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Windows Analysis Report
stk.dll

Overview

General Information

Sample name:	stk.dll
Analysis ID:	1640273
MD5:	14e800e2bd120aa901d6ad64d4cb2e0d
SHA1:	1c0e573414c9203d21ffaaf0f0e1f7e1ac2c2ef1
SHA256:	fdb66a946c59598ecc3cb143c16582b442ec3642b0df1bb025d9eda304ca2236
Infos:

Detection

Score:	88
Range:	0 - 100
Confidence:	100%

Signatures

Multi AV Scanner detection for submitted file

System process connects to network (likely due to code injection or exploit)

Found direct / indirect Syscall (likely to bypass EDR)

Hides threads from debuggers

Joe Sandbox ML detected suspicious sample

Overwrites code with unconditional jumps - possibly settings hooks in foreign process

PE file contains section with special chars

PE file has nameless sections

Tries to detect debuggers (CloseHandle check)

Tries to evade analysis by execution special instruction (VM detection)

Checks if the current process is being debugged

Creates a process in suspended mode (likely to inject code)

Drops PE files

Entry point lies outside standard sections

Found dropped PE file which has not been started or loaded

Internet Provider seen in connection with other malware

JA3 SSL client fingerprint seen in connection with other malware

May sleep (evasive loops) to hinder dynamic analysis

PE file contains sections with non-standard names

Queries the volume information (name, serial number etc) of a device

Sample execution stops while process was sleeping (likely an evasion)

Suricata IDS alerts with low severity for network traffic

Classification

Process Tree

System is w10x64_ra

loaddll64.exe (PID: 2984 cmdline: loaddll64.exe "C:\Users\user\Desktop\stk.dll" MD5: 763455F9DCB24DFEECC2B9D9F8D46D52)

conhost.exe (PID: 1524 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: 0D698AF330FD17BEE3BF90011D49251D)

cmd.exe (PID: 3816 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\stk.dll",#1 MD5: 8A2122E8162DBEF04694B9C3E0B6CDEE)

rundll32.exe (PID: 4448 cmdline: rundll32.exe "C:\Users\user\Desktop\stk.dll",#1 MD5: EF3179D498793BF4234F708D3BE28633)

rundll32.exe (PID: 6016 cmdline: c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,7295 MD5: EF3179D498793BF4234F708D3BE28633)

rundll32.exe (PID: 2092 cmdline: rundll32.exe C:\Users\user\Desktop\stk.dll,Init MD5: EF3179D498793BF4234F708D3BE28633)

rundll32.exe (PID: 3808 cmdline: c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,6138 MD5: EF3179D498793BF4234F708D3BE28633)

rundll32.exe (PID: 3796 cmdline: c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,5329 MD5: EF3179D498793BF4234F708D3BE28633)

cleanup

Malware Configuration

⊘No configs have been found

Yara Signatures

⊘No yara matches

Sigma Signatures

⊘No Sigma rule has matched

Suricata Signatures

ET JA3 Hash - Possible Malware - Fake Firefox Font Update

Timestamp	SID	Severity	Classtype	Source IP	Source Port	Destination IP	Destination Port	Protocol
2025-03-17T02:49:48.761319+0100	2028371	3	Unknown Traffic	192.168.2.16	49703	172.67.69.236	443	TCP
2025-03-17T02:49:51.725612+0100	2028371	3	Unknown Traffic	192.168.2.16	49705	172.67.69.236	443	TCP

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: stk.dll	Virustotal: Detection: 41%			Perma Link
Source: stk.dll	ReversingLabs: Detection: 21%

Joe Sandbox ML detected suspicious sample

Source: Submited Sample

Integrated Neural Analysis Model: Matched 99.3% probability

Source: unknown	HTTPS traffic detected: 172.67.69.236:443 -> 192.168.2.16:49703 version: TLS 1.2
Source: unknown	HTTPS traffic detected: 172.67.69.236:443 -> 192.168.2.16:49705 version: TLS 1.2

Source: stk.dll

Static PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT

Networking

System process connects to network (likely due to code injection or exploit)

Source: C:\Windows\System32\rundll32.exe

Network Connect: 172.67.69.236 443

Jump to behavior

Source: Joe Sandbox View

ASN Name: CLOUDFLARENETUS CLOUDFLARENETUS

Source: Joe Sandbox View

JA3 fingerprint: a0e9f5d64349fb13191bc781f81f42e1

Source: Network traffic	Suricata IDS: 2028371 - Severity 3 - ET JA3 Hash - Possible Malware - Fake Firefox Font Update : 192.168.2.16:49703 -> 172.67.69.236:443
Source: Network traffic	Suricata IDS: 2028371 - Severity 3 - ET JA3 Hash - Possible Malware - Fake Firefox Font Update : 192.168.2.16:49705 -> 172.67.69.236:443

Source: unknown

UDP traffic detected without corresponding DNS query: 1.1.1.1

Source: global traffic

DNS traffic detected: DNS query: auth.patched.to

Source: unknown

HTTP traffic detected: POST /hmc HTTP/1.1Connection: Keep-AliveContent-Type: application/octet-streamAuthorization: User-Agent: PatchedAgent-v1Content-Length: 304Host: auth.patched.to

Source: rundll32.exe, 00000006.00000002.2277487443.000002359C399000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2277302967.000002501BD77000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://crl.cloudflare.com/088a8c70-dba9-4e0a-9bf3-879e0aef6a77.crl0
Source: rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2295176726.0000025022ACA000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702
Source: rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702%3
Source: rundll32.exe, 00000007.00000002.2295176726.0000025022ACA000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702(
Source: rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-securitypolicy/2007024
Source: rundll32.exe, 00000006.00000002.2296471862.00000235A317B000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-securitypolicy/2007025
Source: rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702P
Source: rundll32.exe, 00000006.00000002.2277487443.000002359C399000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702ty
Source: rundll32.exe, 00000007.00000003.1902121125.0000025022B33000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-trust/200512
Source: rundll32.exe, 00000007.00000002.2295176726.0000025022B09000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-trust/200512%0
Source: rundll32.exe, 00000006.00000002.2277487443.000002359C399000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-trust/200512E
Source: rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/ws-sx/ws-trust/200512ifest
Source: rundll32.exe, 00000006.00000002.2304381812.00000235A357F000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000002.2277487443.000002359C399000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1902556440.0000025022A96000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1899345625.0000025022A77000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2290886534.0000025020730000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2308103522.00000250230FE000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd
Source: rundll32.exe, 00000007.00000002.2295176726.00000250229A5000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsdA
Source: rundll32.exe, 00000007.00000003.1902556440.0000025022A96000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1899345625.0000025022A77000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsdW
Source: rundll32.exe, 00000007.00000003.1902556440.0000025022A96000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1899345625.0000025022A77000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsdX
Source: rundll32.exe, 00000006.00000002.2277487443.000002359C464000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1902121125.0000025022B1F000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2295176726.0000025022ACA000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2004/09/policy
Source: rundll32.exe, 00000006.00000002.2277487443.000002359C464000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2004/09/policygT
Source: rundll32.exe, 00000007.00000003.1899345625.00000250229F8000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1904440404.0000025022A1A000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2004/09/policyx
Source: rundll32.exe, 00000007.00000003.1899345625.00000250229F8000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1904440404.0000025022A1A000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2005/02/trust
Source: rundll32.exe, 00000007.00000002.2295176726.0000025022ACA000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2005/02/trust/
Source: rundll32.exe, 00000006.00000002.2277487443.000002359C464000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2005/02/trustGU
Source: rundll32.exe, 00000006.00000002.2277487443.000002359C399000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2295176726.0000025022B09000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2005/07/securitypolicy
Source: rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2005/07/securitypolicy61a
Source: rundll32.exe, 00000007.00000002.2295176726.0000025022B09000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2005/07/securitypolicy80w
Source: rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2005/07/securitypolicynp:
Source: rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/ws/2005/07/securitypolicyt
Source: rundll32.exe, 00000007.00000003.1899345625.0000025022B43000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/wsdl/
Source: rundll32.exe, 00000007.00000002.2295176726.00000250229CB000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/wsdl/3ws
Source: rundll32.exe, 00000007.00000002.2295176726.00000250229CB000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/wsdl/B
Source: rundll32.exe, 00000006.00000003.1943852891.00000235A3533000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1939761812.00000235A352B000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/wsdl/c
Source: rundll32.exe, 00000007.00000003.1899345625.0000025022B43000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/wsdl/soap12/
Source: rundll32.exe, 00000007.00000002.2277302967.000002501BD77000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/wsdl/soap12/Z
Source: rundll32.exe, 00000006.00000003.1943852891.00000235A3533000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1939761812.00000235A352B000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/wsdl/soap12/h
Source: rundll32.exe, 00000006.00000003.1943852891.00000235A3533000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1939761812.00000235A352B000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/wsdl/u
Source: rundll32.exe, 00000007.00000003.1899345625.0000025022B43000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/wsdl/wskL

Source: unknown	Network traffic detected: HTTP traffic on port 49705 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 49703 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 49705
Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 49703

Source: unknown	HTTPS traffic detected: 172.67.69.236:443 -> 192.168.2.16:49703 version: TLS 1.2
Source: unknown	HTTPS traffic detected: 172.67.69.236:443 -> 192.168.2.16:49705 version: TLS 1.2

System Summary

PE file contains section with special chars

Source: stk.dll

Static PE information: section name: .>O"

PE file has nameless sections

Source: PTOAuthEx.dll.3.dr	Static PE information: section name:
Source: PTOAuthEx.dll.3.dr	Static PE information: section name:
Source: PTOAuthEx.dll.3.dr	Static PE information: section name:

Source: PTOAuthEx.dll.3.dr

Static PE information: Section: ZLIB complexity 0.991611328125

Source: classification engine

Classification label: mal88.evad.winDLL@14/1@1/1

Source: C:\Windows\System32\conhost.exe

Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:1524:120:WilError_03

Source: C:\Windows\System32\loaddll64.exe

File created: C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll

Jump to behavior

Source: C:\Windows\System32\loaddll64.exe

Key opened: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers

Jump to behavior

Source: C:\Windows\System32\loaddll64.exe

Process created: C:\Windows\System32\rundll32.exe rundll32.exe C:\Users\user\Desktop\stk.dll,Init

Source: stk.dll	Virustotal: Detection: 41%
Source: stk.dll	ReversingLabs: Detection: 21%

Source: unknown	Process created: C:\Windows\System32\loaddll64.exe loaddll64.exe "C:\Users\user\Desktop\stk.dll"
Source: C:\Windows\System32\loaddll64.exe	Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll64.exe	Process created: C:\Windows\System32\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\stk.dll",#1
Source: C:\Windows\System32\loaddll64.exe	Process created: C:\Windows\System32\rundll32.exe rundll32.exe C:\Users\user\Desktop\stk.dll,Init
Source: C:\Windows\System32\cmd.exe	Process created: C:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\stk.dll",#1
Source: C:\Windows\System32\rundll32.exe	Process created: C:\Windows\System32\rundll32.exe c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,6138
Source: C:\Windows\System32\rundll32.exe	Process created: C:\Windows\System32\rundll32.exe c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,7295
Source: C:\Windows\System32\loaddll64.exe	Process created: C:\Windows\System32\rundll32.exe c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,5329
Source: C:\Windows\System32\loaddll64.exe	Process created: C:\Windows\System32\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\stk.dll",#1	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	Process created: C:\Windows\System32\rundll32.exe rundll32.exe C:\Users\user\Desktop\stk.dll,Init	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	Process created: C:\Windows\System32\rundll32.exe c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,5329	Jump to behavior
Source: C:\Windows\System32\cmd.exe	Process created: C:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\stk.dll",#1	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process created: C:\Windows\System32\rundll32.exe c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,6138	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process created: C:\Windows\System32\rundll32.exe c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,7295	Jump to behavior

Source: C:\Windows\System32\loaddll64.exe

Section loaded: apphelp.dll

Jump to behavior

Source: C:\Windows\System32\rundll32.exe

Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{96b42929-01f1-468c-b521-6294ab438f4a}\InProcServer32

Jump to behavior

Source: C:\Windows\System32\rundll32.exe

File opened: C:\Windows\SYSTEM32\msftedit.dll

Jump to behavior

Source: Window Recorder

Window detected: More than 3 window changes detected

Source: stk.dll

Static PE information: Image base 0x180000000 > 0x60000000

Source: stk.dll

Static file information: File size 5388288 > 1048576

Source: stk.dll

Static PE information: Raw size of .pzT is bigger than: 0x100000 < 0x523000

Source: stk.dll

Static PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT

Source: initial sample

Static PE information: section where entry point is pointing to: .pzT

Source: stk.dll	Static PE information: section name: .IP3
Source: stk.dll	Static PE information: section name: .>O"
Source: stk.dll	Static PE information: section name: .pzT
Source: PTOAuthEx.dll.3.dr	Static PE information: section name:
Source: PTOAuthEx.dll.3.dr	Static PE information: section name:
Source: PTOAuthEx.dll.3.dr	Static PE information: section name:

Source: PTOAuthEx.dll.3.dr

Static PE information: section name: entropy: 7.916340828238215

Source: C:\Windows\System32\rundll32.exe

File created: C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll

Jump to dropped file

Hooking and other Techniques for Hiding and Protection

Overwrites code with unconditional jumps - possibly settings hooks in foreign process

Source: C:\Windows\System32\loaddll64.exe	Memory written: PID: 2984 base: 7FF814A1000D value: E9 BB CB EC FF	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	Memory written: PID: 2984 base: 7FF8148DCBC0 value: E9 5A 34 13 00	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Memory written: PID: 2092 base: 7FF814A1000D value: E9 BB CB EC FF	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Memory written: PID: 2092 base: 7FF8148DCBC0 value: E9 5A 34 13 00	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Memory written: PID: 4448 base: 7FF814A1000D value: E9 BB CB EC FF	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Memory written: PID: 4448 base: 7FF8148DCBC0 value: E9 5A 34 13 00	Jump to behavior

Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior

Malware Analysis System Evasion

Tries to evade analysis by execution special instruction (VM detection)

Source: C:\Windows\System32\loaddll64.exe

Special instruction interceptor: First address: 7FFFEEFD0773 instructions rdtsc caused by: RDTSC with Trap Flag (TF)

Source: C:\Windows\System32\rundll32.exe

Dropped PE file which has not been started: C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll

Jump to dropped file

Source: C:\Windows\System32\rundll32.exe TID: 552	Thread sleep time: -30000s >= -30000s			Jump to behavior
Source: C:\Windows\System32\rundll32.exe TID: 6976	Thread sleep time: -30000s >= -30000s			Jump to behavior

Source: C:\Windows\System32\conhost.exe

Last function: Thread delayed

Source: rundll32.exe, 00000007.00000002.2277302967.000002501BD77000.00000004.00000020.00020000.00000000.sdmp	Binary or memory string: Hyper-V RAWP
Source: rundll32.exe, 00000007.00000002.2308103522.00000250230FE000.00000004.00000020.00020000.00000000.sdmp	Binary or memory string: NXTVMWare
Source: rundll32.exe, 00000006.00000002.2296471862.00000235A317B000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.2006592710.00000235A36BE000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000002.2296471862.00000235A315F000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2295176726.0000025022B09000.00000004.00000020.00020000.00000000.sdmp	Binary or memory string: Hyper-V RAW
Source: rundll32.exe, 00000007.00000002.2303997272.0000025022FC0000.00000004.00000020.00020000.00000000.sdmp	Binary or memory string: Hyper-V RAWf

Source: C:\Windows\System32\loaddll64.exe

Process information queried: ProcessInformation

Jump to behavior

Anti Debugging

Hides threads from debuggers

Source: C:\Windows\System32\loaddll64.exe	Thread information set: HideFromDebugger	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	Thread information set: HideFromDebugger	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Thread information set: HideFromDebugger	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Thread information set: HideFromDebugger	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Thread information set: HideFromDebugger	Jump to behavior

Tries to detect debuggers (CloseHandle check)

Source: C:\Windows\System32\loaddll64.exe	Handle closed: DEADC0DE
Source: C:\Windows\System32\rundll32.exe	Handle closed: DEADC0DE
Source: C:\Windows\System32\rundll32.exe	Handle closed: DEADC0DE

Source: C:\Windows\System32\loaddll64.exe	Process queried: DebugPort	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	Process queried: DebugPort	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugPort	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugPort	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugPort	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugObjectHandle	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Process queried: DebugPort	Jump to behavior

HIPS / PFW / Operating System Protection Evasion

System process connects to network (likely due to code injection or exploit)

Source: C:\Windows\System32\rundll32.exe

Network Connect: 172.67.69.236 443

Jump to behavior

Found direct / indirect Syscall (likely to bypass EDR)

Source: C:\Windows\System32\loaddll64.exe	NtSetInformationThread: Direct from: 0x7FFFEEFB2772	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtProtectVirtualMemory: Direct from: 0x7FFFEEC3FD03	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtSetInformationThread: Direct from: 0x7FFFEEEAD53C	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtProtectVirtualMemory: Direct from: 0x7FFFEEC383AF	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtProtectVirtualMemory: Direct from: 0x7FFFEEEAE9D9	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtProtectVirtualMemory: Direct from: 0x7FFFEEC0A963	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtProtectVirtualMemory: Direct from: 0x7FFFEEBFC9D3	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtClose: Indirect: 0x7FFFEEFD0755
Source: C:\Windows\System32\loaddll64.exe	NtSetInformationProcess: Direct from: 0x7FFFEEFAE013	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtQueryInformationProcess: Direct from: 0x7FFFEEFB30A6	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtQueryInformationProcess: Direct from: 0x7FFFEEFB4626	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtProtectVirtualMemory: Direct from: 0x7FFFEEC484C9	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtQueryInformationProcess: Direct from: 0x7FFFEEFA9310	Jump to behavior
Source: C:\Windows\System32\loaddll64.exe	NtProtectVirtualMemory: Direct from: 0x7FFFEEBF9167	Jump to behavior

Source: C:\Windows\System32\cmd.exe

Process created: C:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\stk.dll",#1

Jump to behavior

Source: C:\Windows\System32\rundll32.exe	Queries volume information: C:\Windows\Fonts\segoeui.ttf VolumeInformation	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Queries volume information: C:\Windows\Fonts\segmdl2.ttf VolumeInformation	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Queries volume information: C:\ProgramData\Microsoft\User Account Pictures\user.png VolumeInformation	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Queries volume information: C:\ProgramData\Microsoft\User Account Pictures\user.png VolumeInformation	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Queries volume information: C:\Windows\Fonts\segoeui.ttf VolumeInformation	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Queries volume information: C:\ProgramData\Microsoft\User Account Pictures\user.png VolumeInformation	Jump to behavior
Source: C:\Windows\System32\rundll32.exe	Queries volume information: C:\ProgramData\Microsoft\User Account Pictures\user.png VolumeInformation	Jump to behavior

Mitre Att&ck Matrix

Reconnaissance	Resource Development	Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Command and Control	Exfiltration	Impact
Gather Victim Identity Information	Acquire Infrastructure	Valid Accounts	Windows Management Instrumentation	1 DLL Side-Loading	111 Process Injection	12 Virtualization/Sandbox Evasion	1 Credential API Hooking	311 Security Software Discovery	Remote Services	1 Credential API Hooking	1 Encrypted Channel	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	1 Abuse Elevation Control Mechanism	111 Process Injection	LSASS Memory	12 Virtualization/Sandbox Evasion	Remote Desktop Protocol	Data from Removable Media	2 Non-Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	1 DLL Side-Loading	1 Abuse Elevation Control Mechanism	Security Account Manager	1 Process Discovery	SMB/Windows Admin Shares	Data from Network Shared Drive	3 Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact
Employee Names	Virtual Private Server	Local Accounts	Cron	Login Hook	Login Hook	1 Obfuscated Files or Information	NTDS	111 System Information Discovery	Distributed Component Object Model	Input Capture	Protocol Impersonation	Traffic Duplication	Data Destruction
Gather Victim Network Information	Server	Cloud Accounts	Launchd	Network Logon Script	Network Logon Script	1 Rundll32	LSA Secrets	Internet Connection Discovery	SSH	Keylogging	Fallback Channels	Scheduled Transfer	Data Encrypted for Impact
Domain Properties	Botnet	Replication Through Removable Media	Scheduled Task	RC Scripts	RC Scripts	2 Software Packing	Cached Domain Credentials	Wi-Fi Discovery	VNC	GUI Input Capture	Multiband Communication	Data Transfer Size Limits	Service Stop
DNS	Web Services	External Remote Services	Systemd Timers	Startup Items	Startup Items	1 DLL Side-Loading	DCSync	Remote System Discovery	Windows Remote Management	Web Portal Capture	Commonly Used Port	Exfiltration Over C2 Channel	Inhibit System Recovery

Behavior Graph

Hide Legend

Legend:

Process
Signature
Created File
DNS/IP Info
Is Dropped
Is Windows Process
Number of created Registry Values
Number of created Files
Visual Basic
Delphi
Java
.Net C# or VB.NET
C, C++ or other language
Is malicious
Internet

Screenshots

Thumbnails

This section contains all screenshots as thumbnails, including those not shown in the slideshow.

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
stk.dll	42%	Virustotal		Browse
stk.dll	22%	ReversingLabs

Dropped Files

Source	Detection	Scanner	Label	Link
C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll	7%	ReversingLabs

Unpacked PE Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

Source	Detection	Scanner	Label	Link
http://crl.cloudflare.com/088a8c70-dba9-4e0a-9bf3-879e0aef6a77.crl0	0%	Avira URL Cloud	safe
https://auth.patched.to/hmc	0%	Avira URL Cloud	safe

Domains and IPs

Contacted Domains

Name	IP	Active	Malicious	Antivirus Detection	Reputation
auth.patched.to	172.67.69.236	true	true		unknown

Contacted URLs

Name	Malicious	Antivirus Detection	Reputation
https://auth.patched.to/hmc	true	Avira URL Cloud: safe	unknown

URLs from Memory and Binaries

Name	Source	Malicious	Antivirus Detection	Reputation
http://schemas.xmlsoap.org/ws/2005/07/securitypolicy80w	rundll32.exe, 00000007.00000002.2295176726.0000025022B09000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702	rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2295176726.0000025022ACA000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/ws/2004/09/policy	rundll32.exe, 00000006.00000002.2277487443.000002359C464000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1902121125.0000025022B1F000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2295176726.0000025022ACA000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/wsdl/soap12/h	rundll32.exe, 00000006.00000003.1943852891.00000235A3533000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1939761812.00000235A352B000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/ws/2004/09/policyx	rundll32.exe, 00000007.00000003.1899345625.00000250229F8000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1904440404.0000025022A1A000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/ws/2005/07/securitypolicy61a	rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/wsdl/c	rundll32.exe, 00000006.00000003.1943852891.00000235A3533000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1939761812.00000235A352B000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/ws/2005/02/trustGU	rundll32.exe, 00000006.00000002.2277487443.000002359C464000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/ws/2005/02/trust	rundll32.exe, 00000007.00000003.1899345625.00000250229F8000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1904440404.0000025022A1A000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-trust/200512E	rundll32.exe, 00000006.00000002.2277487443.000002359C399000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-trust/200512ifest	rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702(	rundll32.exe, 00000007.00000002.2295176726.0000025022ACA000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/ws/2004/09/policygT	rundll32.exe, 00000006.00000002.2277487443.000002359C464000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-securitypolicy/2007025	rundll32.exe, 00000006.00000002.2296471862.00000235A317B000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-securitypolicy/2007024	rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsdA	rundll32.exe, 00000007.00000002.2295176726.00000250229A5000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/wsdl/u	rundll32.exe, 00000006.00000003.1943852891.00000235A3533000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1939761812.00000235A352B000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/ws/2005/07/securitypolicy	rundll32.exe, 00000006.00000002.2277487443.000002359C399000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2295176726.0000025022B09000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-trust/200512%0	rundll32.exe, 00000007.00000002.2295176726.0000025022B09000.00000004.00000020.00020000.00000000.sdmp	false		high
http://crl.cloudflare.com/088a8c70-dba9-4e0a-9bf3-879e0aef6a77.crl0	rundll32.exe, 00000006.00000002.2277487443.000002359C399000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2277302967.000002501BD77000.00000004.00000020.00020000.00000000.sdmp	false	Avira URL Cloud: safe	unknown
http://schemas.xmlsoap.org/wsdl/soap12/	rundll32.exe, 00000007.00000003.1899345625.0000025022B43000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702%3	rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/wsdl/	rundll32.exe, 00000007.00000003.1899345625.0000025022B43000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702ty	rundll32.exe, 00000006.00000002.2277487443.000002359C399000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsdX	rundll32.exe, 00000007.00000003.1902556440.0000025022A96000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1899345625.0000025022A77000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsdW	rundll32.exe, 00000007.00000003.1902556440.0000025022A96000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1899345625.0000025022A77000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/wsdl/B	rundll32.exe, 00000007.00000002.2295176726.00000250229CB000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-trust/200512	rundll32.exe, 00000007.00000003.1902121125.0000025022B33000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd	rundll32.exe, 00000006.00000002.2304381812.00000235A357F000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000006.00000002.2277487443.000002359C399000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1902556440.0000025022A96000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000003.1899345625.0000025022A77000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2290886534.0000025020730000.00000004.00000020.00020000.00000000.sdmp, rundll32.exe, 00000007.00000002.2308103522.00000250230FE000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/wsdl/3ws	rundll32.exe, 00000007.00000002.2295176726.00000250229CB000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/ws/2005/02/trust/	rundll32.exe, 00000007.00000002.2295176726.0000025022ACA000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/ws/2005/07/securitypolicyt	rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/ws/2005/07/securitypolicynp:	rundll32.exe, 00000006.00000003.1936194539.00000235A34FF000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/wsdl/soap12/Z	rundll32.exe, 00000007.00000002.2277302967.000002501BD77000.00000004.00000020.00020000.00000000.sdmp	false		high
http://schemas.xmlsoap.org/wsdl/wskL	rundll32.exe, 00000007.00000003.1899345625.0000025022B43000.00000004.00000020.00020000.00000000.sdmp	false		high
http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702P	rundll32.exe, 00000007.00000003.1899345625.0000025022B07000.00000004.00000020.00020000.00000000.sdmp	false		high

World Map of Contacted IPs

No. of IPs < 25%
25% < No. of IPs < 50%
50% < No. of IPs < 75%
75% < No. of IPs

Public IPs

IP	Domain	Country	Flag	ASN	ASN Name	Malicious
172.67.69.236	auth.patched.to	United States		13335	CLOUDFLARENETUS	true

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1640273
Start date and time:	2025-03-17 02:47:48 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 24s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	defaultwindowsinteractivecookbook.jbs
Analysis system description:	Windows 10 x64 22H2 with Office Professional Plus 2019, Chrome 117, Firefox 118, Adobe Reader DC 23, Java 8 Update 381, 7zip 23.01
Number of analysed new started processes analysed:	19
Number of new started drivers analysed:	0
Number of existing processes analysed:	0
Number of existing drivers analysed:	0
Number of injected processes analysed:	0
Technologies:	EGA enabled AMSI enabled
Analysis Mode:	default
Analysis stop reason:	Timeout
Sample name:	stk.dll
Detection:	MAL
Classification:	mal88.evad.winDLL@14/1@1/1
Cookbook Comments:	Found application associated with file extension: .dll

Warnings

Exclude process from analysis (whitelisted): MpCmdRun.exe, SIHClient.exe, SgrmBroker.exe, backgroundTaskHost.exe, conhost.exe, svchost.exe
Excluded IPs from analysis (whitelisted): 20.109.210.53, 23.199.214.10, 20.190.159.131, 2.19.122.30
Excluded domains from analysis (whitelisted): www.bing.com, fs.microsoft.com, slscr.update.microsoft.com, login.live.com, ctldl.windowsupdate.com, c.pki.goog, fe3cr.delivery.mp.microsoft.com
Not all processes where analyzed, report is missing behavior information
Report size getting too big, too many NtOpenKeyEx calls found.
Report size getting too big, too many NtProtectVirtualMemory calls found.
Report size getting too big, too many NtQueryValueKey calls found.

Simulations

Behavior and APIs

Time	Type	Description
21:49:48	API Interceptor	2x Sleep call for process: rundll32.exe modified

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
172.67.69.236	stk.vmp.dll	Get hash	malicious	Unknown	Browse

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
auth.patched.to	stk.vmp.dll	Get hash	malicious	Unknown	Browse	172.67.69.236

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CLOUDFLARENETUS	re.bot.arm5.elf	Get hash	malicious	Unknown	Browse	1.1.1.1
	re.bot.mpsl.elf	Get hash	malicious	Unknown	Browse	1.1.1.1
	re.bot.mips.elf	Get hash	malicious	Unknown	Browse	1.1.1.1
	CloudServices.exe	Get hash	malicious	MSIL Logger, MassLogger RAT	Browse	104.21.48.1
	re.bot.arm7.elf	Get hash	malicious	Unknown	Browse	1.1.1.1
	CloudServices.exe	Get hash	malicious	MSIL Logger, MassLogger RAT	Browse	104.21.48.1
	RFQ_250037_S12_C01_R0_RU pdf.exe	Get hash	malicious	MSIL Logger, MassLogger RAT	Browse	104.21.48.1
	needagoodplanforsuccesstogetbackbest.hta	Get hash	malicious	Cobalt Strike, MSIL Logger, MassLogger RAT	Browse	104.21.48.1
	needagoodplanforsuccesstogetbackbest.hta	Get hash	malicious	Cobalt Strike, MSIL Logger, MassLogger RAT	Browse	104.21.96.1
	niceworkingskillgivenmebest.hta	Get hash	malicious	Cobalt Strike, MSIL Logger, MassLogger RAT	Browse	104.21.112.1

JA3 Fingerprints

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
a0e9f5d64349fb13191bc781f81f42e1	12Kp1xbcjv.exe	Get hash	malicious	Unknown	Browse	172.67.69.236
	SystemProcess18.exe	Get hash	malicious	GhostRat, Mimikatz, Nitol	Browse	172.67.69.236
	Setup.exe	Get hash	malicious	Unknown	Browse	172.67.69.236
	Setup.exe	Get hash	malicious	Unknown	Browse	172.67.69.236
	#Ud835#Udde6#Ud835#Uddd8#Ud835#Udde7#Ud835#Udde8#Ud835#Udde3.exe	Get hash	malicious	Unknown	Browse	172.67.69.236
	2PFebPN0qK.exe	Get hash	malicious	Latrodectus, LummaC Stealer	Browse	172.67.69.236
	#Ud835#Udde6#Ud835#Uddd8#Ud835#Udde7#Ud835#Udde8#Ud835#Udde3.exe	Get hash	malicious	Unknown	Browse	172.67.69.236
	LaunchV.2.exe	Get hash	malicious	LummaC Stealer	Browse	172.67.69.236
	16Vzai4jwT.exe	Get hash	malicious	CobaltStrike	Browse	172.67.69.236
	Nexol.exe.bin.exe	Get hash	malicious	LummaC Stealer	Browse	172.67.69.236

Dropped Files

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll	stk.vmp.dll	Get hash	malicious	Unknown	Browse

Created / dropped Files

C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll

Download File

Process:	C:\Windows\System32\rundll32.exe
File Type:	PE32+ executable (DLL) (GUI) x86-64, for MS Windows
Category:	dropped
Size (bytes):	923136
Entropy (8bit):	7.914890739598155
Encrypted:	false
SSDEEP:	24576:YorBV6NfBR73yzmt9hao0OvQ1Y6uInOyY:5ifB1yGaMQXnO
MD5:	CAE32DD0E5196AD1BBF0B3C49691EF28
SHA1:	6258071DDC5583B2CA96B3AFC04EF6F2148181F5
SHA-256:	E1D01ACA1736C2B469A92EBDBF1ED000169A357D83A7E1B9AADDA03E990C7BF7
SHA-512:	71B7029CFE7ECC5AE57C365565AFB4EAC8359E4BAE26C722E9CB18613E305A6E999F9D1E3E6544252CDBF1BA8CC60D1339CCA1F4731BCDC0424BE3CCDEFD5506
Malicious:	false
Antivirus:	Antivirus: ReversingLabs, Detection: 7%
Joe Sandbox View:	Filename: stk.vmp.dll, Detection: malicious, Browse
Reputation:	low
Preview:	MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$.......PE..d.....tb.........." ................0........................................0............`..........................................!..H.... ..............................."..........................................@.......................................................................................................................@................ ......................@.............$....O.._5T...........I.......@SH.. H....H..%T...W..S.o...H...H.......a\..). [.vK.....Q.7....ma.H..H.E. E\$.Wc..6.%.S............X....t........H$.6.g.30o._E....B@...:w...A.Q'A..T.n.2..N.HL$.f. y.=.{..cx.B....S......)?..@r.R.Rdwe.=(7..&G......?.....kwJR....`t.9.`.p....D....7.....LU.m.....):..?..... .........9.(8c....W.v..%@.4L...p.$..o..Y..C<D...4....(.......Y3.^....J...L.F..M...q.....D...1&......%.^.mu.c.O27...W.4..s.g........ ..},\|Q.....%......*.8&.

Static File Info

General

File type:	PE32+ executable (DLL) (GUI) x86-64, for MS Windows
Entropy (8bit):	7.869288162468326
TrID:	Win64 Dynamic Link Library (generic) (102004/3) 86.43% Win64 Executable (generic) (12005/4) 10.17% Generic Win/DOS Executable (2004/3) 1.70% DOS Executable Generic (2002/1) 1.70% Autodesk FLIC Image File (extensions: flc, fli, cel) (7/3) 0.01%
File name:	stk.dll
File size:	5'388'288 bytes
MD5:	14e800e2bd120aa901d6ad64d4cb2e0d
SHA1:	1c0e573414c9203d21ffaaf0f0e1f7e1ac2c2ef1
SHA256:	fdb66a946c59598ecc3cb143c16582b442ec3642b0df1bb025d9eda304ca2236
SHA512:	81f6f28c1856a35ebae86ccf268ece3abc6a41386f363d919cee1b101af31bdf5a769975652d82d9d2df0e70494d2d1b6086b7341fe62e04476792b382377592
SSDEEP:	98304:P4BletPVjYYoBSOsxglL0vDtqZpFJrQe/lZbJquCKSY/j3bq2tAG5D8B+ZnPF:GOjUsx6L0vJqZL9QeLJqILqI5x
TLSH:	F04623CB18BBC2F5CC834964D65E1D449EE4D47CC3A9793830CA280BA5BBDA581CE776
File Content Preview:	MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$.......PE..d.....,g.........." ...)..............x...................................................`................................

File Icon


Icon Hash:	7ae282899bbab082

Static PE Info

General

Entrypoint:	0x1807885b0
Entrypoint Section:	.pzT
Digitally signed:	false
Imagebase:	0x180000000
Subsystem:	windows gui
Image File Characteristics:	EXECUTABLE_IMAGE, LARGE_ADDRESS_AWARE, DLL
DLL Characteristics:	HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT
Time Stamp:	0x672CBB9A [Thu Nov 7 13:07:38 2024 UTC]
TLS Callbacks:
CLR (.Net) Version:
OS Version Major:	6
OS Version Minor:	0
File Version Major:	6
File Version Minor:	0
Subsystem Version Major:	6
Subsystem Version Minor:	0
Import Hash:	9e5b39b8c7d85940f81712ccd1ea65c6

Entrypoint Preview

Instruction
call 00007FC800C72A5Bh
clc
call 00007FC7D434FAFBh
cmpsd
hlt
retf
pop eax
jmp 00007FC800DCD638h
les ecx, ebx
pop eax

Data Directories

Name	Virtual Address	Virtual Size	Is in Section
IMAGE_DIRECTORY_ENTRY_EXPORT	0x3e2248	0x3f	.pzT
IMAGE_DIRECTORY_ENTRY_IMPORT	0x6904f8	0x50	.pzT
IMAGE_DIRECTORY_ENTRY_RESOURCE	0x0	0x0
IMAGE_DIRECTORY_ENTRY_EXCEPTION	0x8f4b70	0x5418	.pzT
IMAGE_DIRECTORY_ENTRY_SECURITY	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BASERELOC	0x8fa000	0x58	.reloc
IMAGE_DIRECTORY_ENTRY_DEBUG	0x0	0x0
IMAGE_DIRECTORY_ENTRY_COPYRIGHT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_GLOBALPTR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_TLS	0x0	0x0
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG	0x8f4a30	0x140	.pzT
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IAT	0x3d6000	0x30	.>O"
IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_RESERVED	0x0	0x0

Sections

Name	Virtual Address	Virtual Size	Raw Size	MD5	Xored PE	ZLIB Complexity	File Type	Entropy	Characteristics
.text	0x1000	0x2e174	0x0	d41d8cd98f00b204e9800998ecf8427e	False	0	empty	0.0	IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
.rdata	0x30000	0xf2058	0x0	d41d8cd98f00b204e9800998ecf8427e	False	0	empty	0.0	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
.data	0x123000	0x2d38	0x0	d41d8cd98f00b204e9800998ecf8427e	False	0	empty	0.0	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
.pdata	0x126000	0x2b98	0x0	d41d8cd98f00b204e9800998ecf8427e	False	0	empty	0.0	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
.IP3	0x129000	0x2acfd8	0x0	d41d8cd98f00b204e9800998ecf8427e	unknown	unknown	unknown	unknown	IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
.>O"	0x3d6000	0x60	0x200	277e2cdb6f7b886b62331f45d26d79b9	False	0.05078125	data	0.1833387916558982	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
.pzT	0x3d7000	0x522f88	0x523000	547958910b75896f701a7c2178b33358	unknown	unknown	unknown	unknown	IMAGE_SCN_CNT_CODE, IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_NOT_PAGED, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
.reloc	0x8fa000	0x58	0x200	93a71c14cf058bb3d6cffb82726743fc	False	0.16796875	data	0.9708175080753592	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ

Imports

DLL	Import
KERNEL32.dll	WriteFile
SHLWAPI.dll	PathMatchSpecW
ntdll.dll	RtlCaptureContext

Exports

Name	Ordinal	Address
Init	1	0x18000dc00

Network Behavior

Suricata IDS Alerts

Timestamp	SID	Signature	Severity	Source IP	Source Port	Dest IP	Dest Port	Protocol
2025-03-17T02:49:48.761319+0100	2028371	ET JA3 Hash - Possible Malware - Fake Firefox Font Update	3	192.168.2.16	49703	172.67.69.236	443	TCP
2025-03-17T02:49:51.725612+0100	2028371	ET JA3 Hash - Possible Malware - Fake Firefox Font Update	3	192.168.2.16	49705	172.67.69.236	443	TCP

Network Port Distribution

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 17, 2025 02:49:47.590724945 CET	49703	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:47.590764999 CET	443	49703	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:47.590852976 CET	49703	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:48.291430950 CET	49703	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:48.291462898 CET	443	49703	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:48.761219025 CET	443	49703	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:48.761318922 CET	49703	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:48.796641111 CET	49703	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:48.796662092 CET	443	49703	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:48.796854973 CET	443	49703	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:48.798948050 CET	49703	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:48.798974991 CET	49703	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:48.798979044 CET	443	49703	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:48.919038057 CET	443	49703	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:48.919095993 CET	443	49703	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:48.919153929 CET	49703	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:48.919399023 CET	49703	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:48.919408083 CET	443	49703	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:48.919420004 CET	49703	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:48.919425011 CET	443	49703	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:51.248087883 CET	49705	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:51.248122931 CET	443	49705	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:51.248234034 CET	49705	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:51.250375032 CET	49705	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:51.250391960 CET	443	49705	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:51.725400925 CET	443	49705	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:51.725611925 CET	49705	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:51.775381088 CET	49705	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:51.775394917 CET	443	49705	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:51.775588036 CET	443	49705	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:51.777138948 CET	49705	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:51.777153969 CET	49705	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:51.777158976 CET	443	49705	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:51.912969112 CET	443	49705	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:51.913029909 CET	443	49705	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:51.913121939 CET	49705	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:51.915046930 CET	49705	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:51.915062904 CET	443	49705	172.67.69.236	192.168.2.16
Mar 17, 2025 02:49:51.915111065 CET	49705	443	192.168.2.16	172.67.69.236
Mar 17, 2025 02:49:51.915119886 CET	443	49705	172.67.69.236	192.168.2.16

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 17, 2025 02:49:47.577632904 CET	58485	53	192.168.2.16	1.1.1.1
Mar 17, 2025 02:49:47.586819887 CET	53	58485	1.1.1.1	192.168.2.16

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Mar 17, 2025 02:49:47.577632904 CET	192.168.2.16	1.1.1.1	0x62cb	Standard query (0)	auth.patched.to	A (IP address)	IN (0x0001)	false

DNS Answers

Timestamp	Source IP	Dest IP	Trans ID	Reply Code	Name	Address	Type	Class	DNS over HTTPS
Mar 17, 2025 02:49:47.586819887 CET	1.1.1.1	192.168.2.16	0x62cb	No error (0)	auth.patched.to	172.67.69.236	A (IP address)	IN (0x0001)	false
Mar 17, 2025 02:49:47.586819887 CET	1.1.1.1	192.168.2.16	0x62cb	No error (0)	auth.patched.to	104.26.14.16	A (IP address)	IN (0x0001)	false
Mar 17, 2025 02:49:47.586819887 CET	1.1.1.1	192.168.2.16	0x62cb	No error (0)	auth.patched.to	104.26.15.16	A (IP address)	IN (0x0001)	false

HTTP Request Dependency Graph

auth.patched.to

HTTPS Proxied Packets

Session ID	Source IP	Source Port	Destination IP	Destination Port	PID	Process
0	192.168.2.16	49703	172.67.69.236	443	3796	C:\Windows\System32\rundll32.exe

Timestamp	Bytes transferred	Direction	Data
2025-03-17 01:49:48 UTC	176	OUT	POST /hmc HTTP/1.1 Connection: Keep-Alive Content-Type: application/octet-stream Authorization: User-Agent: PatchedAgent-v1 Content-Length: 304 Host: auth.patched.to
2025-03-17 01:49:48 UTC	304	OUT	Data Raw: 11 10 48 71 b3 47 c6 5a 28 b3 e0 e8 68 38 48 28 77 ba 44 8c 2c 8d 61 5f 4f e6 53 ac e0 54 74 44 44 17 e4 f9 05 2a b6 40 12 91 b7 a9 90 29 b8 5a 37 a5 de 90 9a f7 bd d3 eb b8 50 11 93 d6 16 cb 50 6b b1 7b cd 26 7b fc 36 94 80 a0 c6 f2 99 c9 cb 25 82 12 89 c4 19 7d c2 f7 c5 b9 b7 21 8d b1 a2 4f 3a da 92 7a b9 c6 e4 2d 7b a7 6b 01 4d 4e 91 3a 3a aa 53 a9 7d b3 90 df 5b 3e a9 f7 27 0f 54 d1 b3 9a 8d 83 a1 d2 6a d8 37 89 db 76 54 f9 dc 7c 3b 31 4b cd 39 31 d4 d7 65 7b 50 a7 8e 2a 5e a8 5b 84 8e cb 8f 34 42 c0 17 b6 8b b2 5a 20 87 9d ba 41 80 4e 0b 6b f8 8a cd 23 fa ca e5 1f 12 fb 4e e0 79 3a 94 6f 56 9f 6f 82 35 78 a5 02 25 78 41 be e5 f0 50 89 eb 1f 1b 1b 2c 42 b4 51 67 54 8c 18 a1 ee 0c d1 e3 aa 82 e8 9b 2d 83 82 95 f3 87 ff 4c 51 8d b5 18 58 b7 ab 82 f9 0f Data Ascii: HqGZ(h8H(wD,a_OSTtDD@)Z7PPk{&{6%}!O:z-{kMN::S}[>'Tj7vT\|;1K91e{P^[4BZ ANk#Ny:oVo5x%xAP,BQgT-LQX
2025-03-17 01:49:48 UTC	1038	IN	HTTP/1.1 400 Bad Request Date: Mon, 17 Mar 2025 01:49:48 GMT Content-Type: application/octet-stream Content-Length: 16 Connection: close X-Auth-Code: 400 X-Auth-Result: Bad request Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=zlRGppMc2JTopqFY24UjQ6uf1ZjI7t9UWehMCrqEbShR3aX84y722U0JvEsJiTWU4HdrKnzMJlBvPcsYXF6NSa69Y0TReZ25HeGqh6KAINMAZGTETrJIGCUuB88XCBVAzw%3D%3D"}],"group":"cf-nel","max_age":604800} NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800} Strict-Transport-Security: max-age=15552000; includeSubDomains; preload expect-ct: max-age=86400, enforce referrer-policy: same-origin x-content-type-options: nosniff x-frame-options: SAMEORIGIN x-xss-protection: 1; mode=block Server: cloudflare CF-RAY: 9218d5fc4a1d8c39-EWR alt-svc: h3=":443"; ma=86400 server-timing: cfL4;desc="?proto=TCP&rtt=1996&min_rtt=1990&rtt_var=759&sent=6&recv=8&lost=0&retrans=0&sent_bytes=2820&recv_bytes=1116&delivery_rate=1429270&cwnd=188&unsent_bytes=0&cid=98257ed8be6f24eb&ts=168&x=0"
2025-03-17 01:49:48 UTC	16	IN	Data Raw: 1f b0 11 99 ea 54 0e cb d3 53 ba 14 eb e7 75 df Data Ascii: TSu

Session ID	Source IP	Source Port	Destination IP	Destination Port	PID	Process
1	192.168.2.16	49705	172.67.69.236	443	6016	C:\Windows\System32\rundll32.exe

Timestamp	Bytes transferred	Direction	Data
2025-03-17 01:49:51 UTC	179	OUT	POST /hmc HTTP/1.1 Connection: Keep-Alive Content-Type: application/octet-stream Authorization: 900 User-Agent: PatchedAgent-v1 Content-Length: 304 Host: auth.patched.to
2025-03-17 01:49:51 UTC	304	OUT	Data Raw: 45 60 a1 34 b1 31 02 48 54 45 fd 9e d0 58 c0 17 7c 6e da 04 e8 ba fd d0 e1 45 f9 b3 bb 93 ae 37 9a 95 9d d3 07 c8 35 e4 56 21 ee c8 6f b7 11 8f e7 08 66 68 97 14 0a 1c f4 96 b7 6d 03 bc 0f df c7 ed 04 0e 9d 60 32 b9 94 cc 9e cc 22 13 e7 a7 4f 5c 8d a2 03 28 36 1e cd 1d ad 87 1c 51 2b be d2 61 e1 87 a9 e6 e7 78 d6 38 06 7d 44 c4 e5 8f a9 04 c3 d7 72 1d 1e e3 d9 bf 19 54 a7 a8 f0 a1 8e 36 58 1f 52 43 b2 b7 d4 e7 11 21 b9 57 07 28 e8 a5 d5 b1 94 17 9e 2e 17 67 17 71 ff 6e 70 f1 2b a8 08 99 ef 29 0a e0 c2 d7 c7 bd cf 75 27 61 1f a7 18 a2 95 5d 7a a4 63 19 fa bc fa f2 f1 fb 37 f2 c7 52 81 00 49 2b 2a ff 24 14 6d 5c 45 f0 1b 88 b6 bf d9 7f bf 8f 57 87 ea fb 26 d5 38 7f 52 f3 32 84 26 6d 11 9a 11 27 bf 71 d5 93 a6 57 a5 a2 ab 35 ab b9 f7 2a dc e2 5f fe c9 a4 2d Data Ascii: E`41HTEX\|nE75V!ofhm`2"O\(6Q+ax8}DrT6XRC!W(.gqnp+)u'a]zc7RI+$m\EW&8R2&m'qW5_-
2025-03-17 01:49:51 UTC	1050	IN	HTTP/1.1 400 Bad Request Date: Mon, 17 Mar 2025 01:49:51 GMT Content-Type: application/octet-stream Content-Length: 16 Connection: close X-Auth-Code: 400 X-Auth-Result: Bad request Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=35YodwgdNDC7mvUxe%2FsfH%2FizOAIyl6rV1Xfkqnk%2BaWOpDeRA3JnkjWlCgXHnClwR%2BFnN4n7iLE5iF5q0K6ygWYmF9cRxd5fB6eBsFZZTr%2FLlDPg9LK9Nty6fjolm%2BZnkoA%3D%3D"}],"group":"cf-nel","max_age":604800} NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800} Strict-Transport-Security: max-age=15552000; includeSubDomains; preload expect-ct: max-age=86400, enforce referrer-policy: same-origin x-content-type-options: nosniff x-frame-options: SAMEORIGIN x-xss-protection: 1; mode=block Server: cloudflare CF-RAY: 9218d60eed0443a6-EWR alt-svc: h3=":443"; ma=86400 server-timing: cfL4;desc="?proto=TCP&rtt=1704&min_rtt=1648&rtt_var=658&sent=6&recv=8&lost=0&retrans=0&sent_bytes=2821&recv_bytes=1119&delivery_rate=1771844&cwnd=142&unsent_bytes=0&cid=ff933ee528b4d908&ts=198&x=0"
2025-03-17 01:49:51 UTC	16	IN	Data Raw: f9 84 57 18 22 11 63 ff 93 16 d4 8a 00 ec 7a b8 Data Ascii: W"cz

Statistics

CPU Usage

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Memory Usage

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Behavior

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System Behavior

Analysis Process: loaddll64.exePID: 2984, Parent PID: 4100

General

Target ID:	0
Start time:	21:48:19
Start date:	16/03/2025
Path:	C:\Windows\System32\loaddll64.exe
Wow64 process (32bit):	false
Commandline:	loaddll64.exe "C:\Users\user\Desktop\stk.dll"
Imagebase:	0x7ff76a5d0000
File size:	165'888 bytes
MD5 hash:	763455F9DCB24DFEECC2B9D9F8D46D52
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	false

Show Windows behavior

Chronological Activities

Analysis Process: conhost.exePID: 1524, Parent PID: 2984

General

Target ID:	1
Start time:	21:48:19
Start date:	16/03/2025
Path:	C:\Windows\System32\conhost.exe
Wow64 process (32bit):	false
Commandline:	C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Imagebase:	0x7ff6aa7d0000
File size:	862'208 bytes
MD5 hash:	0D698AF330FD17BEE3BF90011D49251D
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	false

Show Windows behavior

Chronological Activities

Analysis Process: cmd.exePID: 3816, Parent PID: 2984

General

Target ID:	2
Start time:	21:48:19
Start date:	16/03/2025
Path:	C:\Windows\System32\cmd.exe
Wow64 process (32bit):	false
Commandline:	cmd.exe /C rundll32.exe "C:\Users\user\Desktop\stk.dll",#1
Imagebase:	0x7ff7d5190000
File size:	289'792 bytes
MD5 hash:	8A2122E8162DBEF04694B9C3E0B6CDEE
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	false

Show Windows behavior

Chronological Activities

Analysis Process: rundll32.exePID: 2092, Parent PID: 2984

General

Target ID:	3
Start time:	21:48:19
Start date:	16/03/2025
Path:	C:\Windows\System32\rundll32.exe
Wow64 process (32bit):	false
Commandline:	rundll32.exe C:\Users\user\Desktop\stk.dll,Init
Imagebase:	0x7ff619460000
File size:	71'680 bytes
MD5 hash:	EF3179D498793BF4234F708D3BE28633
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	false

Show Windows behavior

Chronological Activities

Analysis Process: rundll32.exePID: 4448, Parent PID: 3816

General

Target ID:	4
Start time:	21:48:19
Start date:	16/03/2025
Path:	C:\Windows\System32\rundll32.exe
Wow64 process (32bit):	false
Commandline:	rundll32.exe "C:\Users\user\Desktop\stk.dll",#1
Imagebase:	0x7ff619460000
File size:	71'680 bytes
MD5 hash:	EF3179D498793BF4234F708D3BE28633
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	false

Show Windows behavior

Chronological Activities

Analysis Process: rundll32.exePID: 3808, Parent PID: 2092

General

Target ID:	5
Start time:	21:48:20
Start date:	16/03/2025
Path:	C:\Windows\System32\rundll32.exe
Wow64 process (32bit):	false
Commandline:	c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,6138
Imagebase:	0x7ff619460000
File size:	71'680 bytes
MD5 hash:	EF3179D498793BF4234F708D3BE28633
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	false

Show Windows behavior

Chronological Activities

Analysis Process: rundll32.exePID: 6016, Parent PID: 4448

General

Target ID:	6
Start time:	21:48:20
Start date:	16/03/2025
Path:	C:\Windows\System32\rundll32.exe
Wow64 process (32bit):	false
Commandline:	c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,7295
Imagebase:	0x7ff619460000
File size:	71'680 bytes
MD5 hash:	EF3179D498793BF4234F708D3BE28633
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	false

Show Windows behavior

Chronological Activities

Analysis Process: rundll32.exePID: 3796, Parent PID: 2984

General

Target ID:	7
Start time:	21:48:22
Start date:	16/03/2025
Path:	C:\Windows\System32\rundll32.exe
Wow64 process (32bit):	false
Commandline:	c:\windows\system32\rundll32.exe "C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll",Init hmc,5329
Imagebase:	0x7ff619460000
File size:	71'680 bytes
MD5 hash:	EF3179D498793BF4234F708D3BE28633
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high
Has exited:	false

Show Windows behavior

Chronological Activities

Disassembly

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Description:	Adversaries may execute their own malicious payloads by side-loading DLLs. Similar to DLL Search Order Hijacking , side-loading involves hijacking which DLL a program loads. But rather than just planting the DLL within the search order of a program then waiting for the victim application to be invoked, adversaries may directly side-load their payloads by planting then invoking a legitimate application that executes their payload(s).
Tactics:	Defense Evasion, Persistence, Privilege Escalation
Data Sources:	File: File Creation, File: File Modification, Module: Module Load, Process: Process Creation
Platforms:	Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may inject code into processes in order to evade process-based defenses as well as possibly elevate privileges. Process injection is a method of executing arbitrary code in the address space of a separate live process. Running code in the context of another process may allow access to the process's memory, system/network resources, and possibly elevated privileges. Execution via process injection may also evade detection from security products since the execution is masked under a legitimate process.
Tactics:	Defense Evasion, Privilege Escalation
Data Sources:	File: File Metadata, File: File Modification, Module: Module Load, Process: OS API Execution, Process: Process Access, Process: Process Metadata, Process: Process Modification
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may circumvent mechanisms designed to control elevate privileges to gain higher-level permissions. Most modern systems contain native elevation control mechanisms that are intended to limit privileges that a user can perform on a machine. Authorization has to be granted to specific users in order to perform tasks that can be considered of higher risk. An adversary can perform several methods to take advantage of built-in control mechanisms in order to escalate privileges on a system.
Tactics:	Defense Evasion, Privilege Escalation
Data Sources:	Command: Command Execution, File: File Metadata, File: File Modification, Process: OS API Execution, Process: Process Creation, Process: Process Metadata, User Account: User Account Modification, Windows Registry: Windows Registry Key Modification
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Office 365, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may employ various means to detect and avoid virtualization and analysis environments. This may include changing behaviors based on the results of checks for the presence of artifacts indicative of a virtual machine environment (VME) or sandbox. If the adversary detects a VME, they may alter their malware to disengage from the victim or conceal the core functions of the implant. They may also search for VME artifacts before dropping secondary or additional payloads. Adversaries may use the information learned from [Virtualization/Sandbox Evasion](https://attack.mitre.org/techniques/T1497) during automated discovery to shape follow-on behaviors.
Tactics:	Defense Evasion, Discovery
Data Sources:	Command: Command Execution, Process: OS API Execution, Process: Process Creation
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. This is common behavior that can be used across different platforms and the network to evade defenses.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Creation, File: File Metadata, Module: Module Load, Process: OS API Execution, Process: Process Creation, Script: Script Execution, WMI: WMI Creation, Windows Registry: Windows Registry Key Creation
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may abuse rundll32.exe to proxy execution of malicious code. Using rundll32.exe, vice executing directly (i.e. Shared Modules ), may avoid triggering security tools that may not monitor execution of the rundll32.exe process because of allowlists or false positives from normal operations. Rundll32.exe is commonly associated with executing DLL payloads (ex: `rundll32.exe {DLLname, DLLfunction}` ).
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Metadata, Module: Module Load, Process: Process Creation
Platforms:	Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may perform software packing or virtual machine software protection to conceal their code. Software packing is a method of compressing or encrypting an executable. Packing an executable changes the file signature in an attempt to avoid signature-based detection. Most decompression techniques decompress the executable code in memory. Virtual machine software protection translates an executable's original code into a special format that only a special virtual machine can run. A virtual machine is then called to run this code.
Tactics:	Defense Evasion
Data Sources:	File: File Metadata
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may hook into Windows application programming interface (API) functions to collect user credentials. Malicious hooking mechanisms may capture API calls that include parameters that reveal user authentication credentials.Unlike Keylogging , this technique focuses specifically on API functions that include parameters that reveal user credentials. Hooking involves redirecting calls to these functions and can be implemented via:
Tactics:	Collection, Credential Access
Data Sources:	Process: OS API Execution, Process: Process Metadata
Platforms:	Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get a listing of security software, configurations, defensive tools, and sensors that are installed on a system or in a cloud environment. This may include things such as firewall rules and anti-virus. Adversaries may use the information from Security Software Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Firewall: Firewall Enumeration, Firewall: Firewall Metadata, Process: OS API Execution, Process: Process Creation
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Office 365, SaaS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get information about running processes on a system. Information obtained could be used to gain an understanding of common software/applications running on systems within the network. Adversaries may use the information from Process Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Process: OS API Execution, Process: Process Creation
Platforms:	Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture. Adversaries may use the information from System Information Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Process: OS API Execution, Process: Process Creation
Platforms:	IaaS, Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol. Despite the use of a secure algorithm, these implementations may be vulnerable to reverse engineering if secret keys are encoded and/or generated within malware samples/configuration files.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may use an OSI non-application layer protocol for communication between host and C2 server or among infected hosts within a network. The list of possible protocols is extensive.Specific examples include use of network layer protocols, such as the Internet Control Message Protocol (ICMP), transport layer protocols, such as the User Datagram Protocol (UDP), session layer protocols, such as Socket Secure (SOCKS), as well as redirected/tunneled protocols, such as Serial over LAN (SOL).
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may communicate using OSI application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Windows Analysis Report stk.dll

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Configuration

Yara Signatures

Sigma Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Compliance

Networking

System Summary

Data Obfuscation

Persistence and Installation Behavior

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

Anti Debugging

HIPS / PFW / Operating System Protection Evasion

Language, Device and Operating System Detection

Mitre Att&ck Matrix

Behavior Graph

Screenshots

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Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Unpacked PE Files

Domains

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Domains and IPs

Contacted Domains

Contacted URLs

URLs from Memory and Binaries

World Map of Contacted IPs

Public IPs

General Information

Warnings

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Behavior and APIs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

C:\Users\user\AppData\Local\Temp\PTOAuthEx.dll

Static File Info

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Static PE Info

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Entrypoint Preview

Data Directories

Sections

Imports

Exports

Network Behavior

Suricata IDS Alerts

Network Port Distribution

TCP Packets

UDP Packets

DNS Queries

DNS Answers

HTTP Request Dependency Graph

HTTPS Proxied Packets

Statistics

CPU Usage

Memory Usage

Windows Analysis Report
stk.dll