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Windows Analysis Report
oAuym78xev.exe

Overview

General Information

Sample name:	oAuym78xev.exe renamed because original name is a hash value
Original sample name:	78ec0aabbdf53c96bdbf83c3cd42e0eb9c6dfc098977048133b5429c0551438e.exe
Analysis ID:	1631846
MD5:	6333f016a1eb2ef1cca4ec9cce3736ee
SHA1:	9da82c51e330af2ff761a5a05d183fbfcf814d33
SHA256:	78ec0aabbdf53c96bdbf83c3cd42e0eb9c6dfc098977048133b5429c0551438e
Tags:	exesigneduser-adrian__luca
Infos:

Detection

GuLoader

Score:	80
Range:	0 - 100
Confidence:	100%

Signatures

Antivirus / Scanner detection for submitted sample

Multi AV Scanner detection for submitted file

Yara detected GuLoader

AI detected suspicious PE digital signature

Joe Sandbox ML detected suspicious sample

Switches to a custom stack to bypass stack traces

Tries to detect virtualization through RDTSC time measurements

Abnormal high CPU Usage

Contains functionality for read data from the clipboard

Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)

Contains functionality to dynamically determine API calls

Contains functionality to shutdown / reboot the system

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

Creates files inside the system directory

Detected potential crypto function

Drops PE files

Found dropped PE file which has not been started or loaded

JA3 SSL client fingerprint seen in connection with other malware

PE / OLE file has an invalid certificate

Suricata IDS alerts with low severity for network traffic

Uses 32bit PE files

Uses a known web browser user agent for HTTP communication

Uses code obfuscation techniques (call, push, ret)

Classification

Process Tree

System is w10x64

oAuym78xev.exe (PID: 7124 cmdline: "C:\Users\user\Desktop\oAuym78xev.exe" MD5: 6333F016A1EB2EF1CCA4EC9CCE3736EE)

oAuym78xev.exe (PID: 2776 cmdline: "C:\Users\user\Desktop\oAuym78xev.exe" MD5: 6333F016A1EB2EF1CCA4EC9CCE3736EE)

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
CloudEyE, GuLoader	CloudEyE (initially named GuLoader) is a small VB5/6 downloader. It typically downloads RATs/Stealers, such as Agent Tesla, Arkei/Vidar, Formbook, Lokibot, Netwire and Remcos, often but not always from Google Drive. The downloaded payload is xored.	No Attribution	http://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/bluebottle-banks-targeted-africa https://0x00sec.org/t/analyzing-modern-malware-techniques-part-3/18943 https://any.run/cybersecurity-blog/deobfuscating-guloader/ https://asec.ahnlab.com/en/55978/ https://blog.checkpoint.com/security/march-2023s-most-wanted-malware-new-emotet-campaign-bypasses-microsoft-blocks-to-distribute-malicious-onenote-files/	https://malpedia.caad.fkie.fraunhofer.de/details/win.cloudeye

Yara Signatures

Memory Dumps

Source	Rule	Description	Author	Strings
00000000.00000002.3119456623.00000000070CA000.00000040.00001000.00020000.00000000.sdmp	JoeSecurity_GuLoader_2	Yara detected GuLoader	Joe Security

Suricata Signatures

ETPRO MALWARE Common Downloader Header Pattern UHCa

Timestamp	SID	Severity	Classtype	Source IP	Source Port	Destination IP	Destination Port	Protocol
2025-03-07T16:37:27.488371+0100	2803270	2	Potentially Bad Traffic	192.168.2.9	49691	142.250.184.206	443	TCP

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Antivirus / Scanner detection for submitted sample

Source: oAuym78xev.exe

Avira: detected

Multi AV Scanner detection for submitted file

Source: oAuym78xev.exe	Virustotal: Detection: 71%			Perma Link
Source: oAuym78xev.exe	ReversingLabs: Detection: 52%

Joe Sandbox ML detected suspicious sample

Source: Submited Sample

Integrated Neural Analysis Model: Matched 100.0% probability

Source: oAuym78xev.exe

Static PE information: RELOCS_STRIPPED, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, LOCAL_SYMS_STRIPPED, 32BIT_MACHINE

Source: unknown	HTTPS traffic detected: 142.250.184.206:443 -> 192.168.2.9:49691 version: TLS 1.2
Source: unknown	HTTPS traffic detected: 142.250.185.225:443 -> 192.168.2.9:49692 version: TLS 1.2

Source: oAuym78xev.exe

Static PE information: DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE

Source: C:\Users\user\Desktop\oAuym78xev.exe	Code function: 0_2_00406404 FindFirstFileW,FindClose,	0_2_00406404
Source: C:\Users\user\Desktop\oAuym78xev.exe	Code function: 0_2_004058B2 GetTempPathW,DeleteFileW,lstrcatW,lstrcatW,lstrlenW,FindFirstFileW,FindNextFileW,FindClose,	0_2_004058B2
Source: C:\Users\user\Desktop\oAuym78xev.exe	Code function: 0_2_0040287E FindFirstFileW,	0_2_0040287E

Source: Joe Sandbox View

JA3 fingerprint: 37f463bf4616ecd445d4a1937da06e19

Source: Network traffic

Suricata IDS: 2803270 - Severity 2 - ETPRO MALWARE Common Downloader Header Pattern UHCa : 192.168.2.9:49691 -> 142.250.184.206:443

Source: global traffic	HTTP traffic detected: GET /uc?export=download&id=1-ToAtaHbRKlgQ3IAfMQsFD67yEamsGyO HTTP/1.1User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0Host: drive.google.comCache-Control: no-cache
Source: global traffic	HTTP traffic detected: GET /download?id=1-ToAtaHbRKlgQ3IAfMQsFD67yEamsGyO&export=download HTTP/1.1User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0Cache-Control: no-cacheHost: drive.usercontent.google.comConnection: Keep-Alive

Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1

Source: global traffic	HTTP traffic detected: GET /uc?export=download&id=1-ToAtaHbRKlgQ3IAfMQsFD67yEamsGyO HTTP/1.1User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0Host: drive.google.comCache-Control: no-cache
Source: global traffic	HTTP traffic detected: GET /download?id=1-ToAtaHbRKlgQ3IAfMQsFD67yEamsGyO&export=download HTTP/1.1User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0Cache-Control: no-cacheHost: drive.usercontent.google.comConnection: Keep-Alive

Source: global traffic	DNS traffic detected: DNS query: drive.google.com
Source: global traffic	DNS traffic detected: DNS query: drive.usercontent.google.com

Source: oAuym78xev.exe, 00000000.00000000.875776178.000000000040A000.00000008.00000001.01000000.00000003.sdmp, oAuym78xev.exe, 00000000.00000002.3118132739.000000000040A000.00000004.00000001.01000000.00000003.sdmp	String found in binary or memory: http://nsis.sf.net/NSIS_ErrorError
Source: oAuym78xev.exe, 0000000B.00000003.3252009975.0000000007321000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://apis.google.com
Source: oAuym78xev.exe, 0000000B.00000002.3349816236.0000000007278000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://drive.google.com/
Source: oAuym78xev.exe, 0000000B.00000002.3349816236.0000000007278000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://drive.google.com/uc?export=download&id=1-ToAtaHbRKlgQ3IAfMQsFD67yEamsGyO
Source: oAuym78xev.exe, 0000000B.00000002.3349816236.0000000007278000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://drive.google.com/uc?export=download&id=1-ToAtaHbRKlgQ3IAfMQsFD67yEamsGyOK
Source: oAuym78xev.exe, 0000000B.00000002.3349816236.0000000007278000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://drive.google.com/uc?export=download&id=1-ToAtaHbRKlgQ3IAfMQsFD67yEamsGyOS
Source: oAuym78xev.exe, 0000000B.00000003.3319331401.00000000072E3000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://drive.usercontent.google.com/2
Source: oAuym78xev.exe, 0000000B.00000003.3319331401.00000000072E3000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://drive.usercontent.google.com/P
Source: oAuym78xev.exe, 0000000B.00000003.3252009975.0000000007321000.00000004.00000020.00020000.00000000.sdmp, oAuym78xev.exe, 0000000B.00000003.3319331401.00000000072E3000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://drive.usercontent.google.com/download?id=1-ToAtaHbRKlgQ3IAfMQsFD67yEamsGyO&export=download
Source: oAuym78xev.exe, 0000000B.00000002.3349816236.0000000007278000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://drive.usercontent.google.com/download?id=1-ToAtaHbRKlgQ3IAfMQsFD67yEamsGyO&export=downloadi
Source: oAuym78xev.exe, 0000000B.00000003.3319331401.00000000072E3000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://drive.usercontent.google.com/download?id=1-ToAtaHbRKlgQ3IAfMQsFD67yEamsGyO&export=downloadr
Source: oAuym78xev.exe, 0000000B.00000003.3252009975.0000000007321000.00000004.00000020.00020000.00000000.sdmp, oAuym78xev.exe, 0000000B.00000002.3349816236.00000000072CD000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://ssl.gstatic.com
Source: oAuym78xev.exe, 0000000B.00000003.3252009975.0000000007321000.00000004.00000020.00020000.00000000.sdmp, oAuym78xev.exe, 0000000B.00000002.3349816236.00000000072CD000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://www.google-analytics.com;report-uri
Source: oAuym78xev.exe, 0000000B.00000003.3252009975.0000000007321000.00000004.00000020.00020000.00000000.sdmp, oAuym78xev.exe, 0000000B.00000002.3349816236.00000000072CD000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://www.google.com
Source: oAuym78xev.exe, 0000000B.00000003.3252009975.0000000007321000.00000004.00000020.00020000.00000000.sdmp, oAuym78xev.exe, 0000000B.00000002.3349816236.00000000072CD000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://www.googletagmanager.com
Source: oAuym78xev.exe, 0000000B.00000003.3252009975.0000000007321000.00000004.00000020.00020000.00000000.sdmp, oAuym78xev.exe, 0000000B.00000002.3349816236.00000000072CD000.00000004.00000020.00020000.00000000.sdmp	String found in binary or memory: https://www.gstatic.com

Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 49692
Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 49691
Source: unknown	Network traffic detected: HTTP traffic on port 49692 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 49691 -> 443

Source: unknown	HTTPS traffic detected: 142.250.184.206:443 -> 192.168.2.9:49691 version: TLS 1.2
Source: unknown	HTTPS traffic detected: 142.250.185.225:443 -> 192.168.2.9:49692 version: TLS 1.2

Source: C:\Users\user\Desktop\oAuym78xev.exe

Code function: 0_2_0040535F GetDlgItem,GetDlgItem,GetDlgItem,GetDlgItem,GetClientRect,GetSystemMetrics,SendMessageW,SendMessageW,SendMessageW,SendMessageW,SendMessageW,SendMessageW,ShowWindow,ShowWindow,GetDlgItem,SendMessageW,SendMessageW,SendMessageW,GetDlgItem,CreateThread,CloseHandle,ShowWindow,ShowWindow,ShowWindow,ShowWindow,LdrInitializeThunk,SendMessageW,CreatePopupMenu,LdrInitializeThunk,AppendMenuW,GetWindowRect,TrackPopupMenu,SendMessageW,OpenClipboard,EmptyClipboard,GlobalAlloc,GlobalLock,SendMessageW,GlobalUnlock,SetClipboardData,CloseClipboard,

0_2_0040535F

Source: C:\Users\user\Desktop\oAuym78xev.exe

Process Stats: CPU usage > 49%

Source: C:\Users\user\Desktop\oAuym78xev.exe

Code function: 0_2_00403311 EntryPoint,SetErrorMode,GetVersion,lstrlenA,#17,OleInitialize,SHGetFileInfoW,GetCommandLineW,GetModuleHandleW,CharNextW,GetTempPathW,GetTempPathW,GetWindowsDirectoryW,lstrcatW,GetTempPathW,lstrcatW,SetEnvironmentVariableW,SetEnvironmentVariableW,SetEnvironmentVariableW,DeleteFileW,OleUninitialize,ExitProcess,lstrcatW,lstrcatW,lstrcatW,lstrcmpiW,SetCurrentDirectoryW,DeleteFileW,LdrInitializeThunk,CopyFileW,CloseHandle,GetCurrentProcess,OpenProcessToken,LookupPrivilegeValueW,AdjustTokenPrivileges,ExitWindowsEx,ExitProcess,

0_2_00403311

Source: C:\Users\user\Desktop\oAuym78xev.exe

File created: C:\Windows\resources\0809

Jump to behavior

Source: C:\Users\user\Desktop\oAuym78xev.exe

Code function: 0_2_00404B9C

0_2_00404B9C

Source: oAuym78xev.exe

Static PE information: invalid certificate

Source: oAuym78xev.exe

Static PE information: RELOCS_STRIPPED, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, LOCAL_SYMS_STRIPPED, 32BIT_MACHINE

Source: classification engine

Classification label: mal80.troj.evad.winEXE@3/17@2/2

Source: C:\Users\user\Desktop\oAuym78xev.exe

0_2_00403311

Source: C:\Users\user\Desktop\oAuym78xev.exe

Code function: 0_2_0040474E CoTaskMemFree,lstrcmpiW,lstrcatW,SetDlgItemTextW,LdrInitializeThunk,GetDiskFreeSpaceW,MulDiv,SetDlgItemTextW,

0_2_0040474E

Source: C:\Users\user\Desktop\oAuym78xev.exe

Code function: 0_2_0040216A LdrInitializeThunk,CoCreateInstance,LdrInitializeThunk,

0_2_0040216A

Source: C:\Users\user\Desktop\oAuym78xev.exe

File created: C:\Users\user\Pictures\stenografere.ini

Jump to behavior

Source: C:\Users\user\Desktop\oAuym78xev.exe

File created: C:\Users\user\AppData\Local\Temp\nszD81.tmp

Jump to behavior

Source: oAuym78xev.exe

Static PE information: Section: .text IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ

Source: C:\Users\user\Desktop\oAuym78xev.exe

File read: C:\Users\desktop.ini

Jump to behavior

Source: C:\Users\user\Desktop\oAuym78xev.exe

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

Jump to behavior

Source: oAuym78xev.exe	Virustotal: Detection: 71%
Source: oAuym78xev.exe	ReversingLabs: Detection: 52%

Source: C:\Users\user\Desktop\oAuym78xev.exe

File read: C:\Users\user\Desktop\oAuym78xev.exe

Jump to behavior

Source: unknown	Process created: C:\Users\user\Desktop\oAuym78xev.exe "C:\Users\user\Desktop\oAuym78xev.exe"
Source: C:\Users\user\Desktop\oAuym78xev.exe	Process created: C:\Users\user\Desktop\oAuym78xev.exe "C:\Users\user\Desktop\oAuym78xev.exe"
Source: C:\Users\user\Desktop\oAuym78xev.exe	Process created: C:\Users\user\Desktop\oAuym78xev.exe "C:\Users\user\Desktop\oAuym78xev.exe"	Jump to behavior

Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: uxtheme.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: userenv.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: apphelp.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: propsys.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: dwmapi.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: cryptbase.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: oleacc.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: version.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: shfolder.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: kernel.appcore.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: windows.storage.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: wldp.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: riched20.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: usp10.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: msls31.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: textinputframework.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: coreuicomponents.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: coremessaging.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: ntmarta.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: coremessaging.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: wintypes.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: wintypes.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: wintypes.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: textshaping.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: iertutil.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: sspicli.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: powrprof.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: winhttp.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: wkscli.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: netutils.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: umpdc.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: wininet.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: windows.storage.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: wldp.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: profapi.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: kernel.appcore.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: ondemandconnroutehelper.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: mswsock.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: iphlpapi.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: winnsi.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: urlmon.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: srvcli.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: dnsapi.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: rasadhlp.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: fwpuclnt.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: schannel.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: mskeyprotect.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: ntasn1.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: msasn1.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: dpapi.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: cryptsp.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: rsaenh.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: cryptbase.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: gpapi.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: ncrypt.dll	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Section loaded: ncryptsslp.dll	Jump to behavior

Source: C:\Users\user\Desktop\oAuym78xev.exe

Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f486a52-3cb1-48fd-8f50-b8dc300d9f9d}\InProcServer32

Jump to behavior

Source: C:\Users\user\Desktop\oAuym78xev.exe

File written: C:\Users\user\AppData\Roaming\Microsoft\Windows\Templates\Krigsretters95\ekspeditionssedlernes\Granat.ini

Jump to behavior

Source: oAuym78xev.exe

Static PE information: DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE

Data Obfuscation

Yara detected GuLoader

Source: Yara match

File source: 00000000.00000002.3119456623.00000000070CA000.00000040.00001000.00020000.00000000.sdmp, type: MEMORY

Source: C:\Users\user\Desktop\oAuym78xev.exe

Code function: 0_2_10001B18 GlobalAlloc,lstrcpyW,lstrcpyW,GlobalFree,GlobalFree,GlobalFree,GlobalFree,GlobalFree,GlobalFree,lstrcpyW,GetModuleHandleW,LoadLibraryW,GetProcAddress,lstrlenW,

0_2_10001B18

Source: C:\Users\user\Desktop\oAuym78xev.exe

Code function: 0_2_10002DE0 push eax; ret

0_2_10002E0E

Persistence and Installation Behavior

AI detected suspicious PE digital signature

Source: Initial sample

Joe Sandbox AI: Detected suspicious elements in PE signature: Multiple highly suspicious indicators: 1) Self-signed certificate (issuer same as subject) which is not trusted by system. 2) Suspicious email domain 'Perigenital.Ung' appears non-corporate and potentially generated. 3) Organization 'Gearwheels' is not a known legitimate company. 4) Large time gap between compilation date (2016) and certificate dates (2024-2025) suggests certificate was likely created long after the binary. 5) The OU field contains strange concatenated words 'Lancashire Richter Tachygrapher' that appear randomly generated. 6) While the country (FR) is not inherently suspicious, the combination with other factors suggests this is likely a fake French entity. The overall pattern strongly indicates a malicious attempt to appear legitimate while using generated/fake certificate details.

Source: C:\Users\user\Desktop\oAuym78xev.exe	File created: C:\Users\user\AppData\Local\Temp\nsb1264.tmp\LangDLL.dll			Jump to dropped file
Source: C:\Users\user\Desktop\oAuym78xev.exe	File created: C:\Users\user\AppData\Local\Temp\nsb1264.tmp\System.dll			Jump to dropped file

Source: C:\Users\user\Desktop\oAuym78xev.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Users\user\Desktop\oAuym78xev.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior

Malware Analysis System Evasion

Switches to a custom stack to bypass stack traces

Source: C:\Users\user\Desktop\oAuym78xev.exe	API/Special instruction interceptor: Address: 73A89BD
Source: C:\Users\user\Desktop\oAuym78xev.exe	API/Special instruction interceptor: Address: 42389BD

Tries to detect virtualization through RDTSC time measurements

Source: C:\Users\user\Desktop\oAuym78xev.exe	RDTSC instruction interceptor: First address: 7367C61 second address: 7367C61 instructions: 0x00000000 rdtsc 0x00000002 cmp ebx, ecx 0x00000004 jc 00007FDAE8722C08h 0x00000006 cmp ebx, ecx 0x00000008 inc ebp 0x00000009 inc ebx 0x0000000a rdtsc
Source: C:\Users\user\Desktop\oAuym78xev.exe	RDTSC instruction interceptor: First address: 41F7C61 second address: 41F7C61 instructions: 0x00000000 rdtsc 0x00000002 cmp ebx, ecx 0x00000004 jc 00007FDAE8D50978h 0x00000006 cmp ebx, ecx 0x00000008 inc ebp 0x00000009 inc ebx 0x0000000a rdtsc

Source: C:\Users\user\Desktop\oAuym78xev.exe	Dropped PE file which has not been started: C:\Users\user\AppData\Local\Temp\nsb1264.tmp\LangDLL.dll			Jump to dropped file
Source: C:\Users\user\Desktop\oAuym78xev.exe	Dropped PE file which has not been started: C:\Users\user\AppData\Local\Temp\nsb1264.tmp\System.dll			Jump to dropped file

Source: C:\Users\user\Desktop\oAuym78xev.exe	Code function: 0_2_00406404 FindFirstFileW,FindClose,	0_2_00406404
Source: C:\Users\user\Desktop\oAuym78xev.exe	Code function: 0_2_004058B2 GetTempPathW,DeleteFileW,lstrcatW,lstrcatW,lstrlenW,FindFirstFileW,FindNextFileW,FindClose,	0_2_004058B2
Source: C:\Users\user\Desktop\oAuym78xev.exe	Code function: 0_2_0040287E FindFirstFileW,	0_2_0040287E

Source: oAuym78xev.exe, 0000000B.00000002.3349816236.00000000072CD000.00000004.00000020.00020000.00000000.sdmp	Binary or memory string: Hyper-V RAW9m
Source: oAuym78xev.exe, 0000000B.00000002.3349816236.0000000007278000.00000004.00000020.00020000.00000000.sdmp, oAuym78xev.exe, 0000000B.00000002.3349816236.00000000072CD000.00000004.00000020.00020000.00000000.sdmp	Binary or memory string: Hyper-V RAW

Source: C:\Users\user\Desktop\oAuym78xev.exe	API call chain: ExitProcess graph end node			graph_0-4370
Source: C:\Users\user\Desktop\oAuym78xev.exe	API call chain: ExitProcess graph end node			graph_0-4379

Source: C:\Users\user\Desktop\oAuym78xev.exe

Code function: 0_2_00401E43 LdrInitializeThunk,ShowWindow,EnableWindow,

0_2_00401E43

Source: C:\Users\user\Desktop\oAuym78xev.exe

Code function: 0_2_10001B18 GlobalAlloc,lstrcpyW,lstrcpyW,GlobalFree,GlobalFree,GlobalFree,GlobalFree,GlobalFree,GlobalFree,lstrcpyW,GetModuleHandleW,LoadLibraryW,GetProcAddress,lstrlenW,

0_2_10001B18

Source: C:\Users\user\Desktop\oAuym78xev.exe

Process created: C:\Users\user\Desktop\oAuym78xev.exe "C:\Users\user\Desktop\oAuym78xev.exe"

Jump to behavior

Source: C:\Users\user\Desktop\oAuym78xev.exe

0_2_00403311

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	1 Native API	1 DLL Side-Loading	1 Access Token Manipulation	11 Masquerading	OS Credential Dumping	21 Security Software Discovery	Remote Services	1 Archive Collected Data	11 Encrypted Channel	Exfiltration Over Other Network Medium	1 System Shutdown/Reboot
Credentials	Domains	Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	11 Process Injection	1 Access Token Manipulation	LSASS Memory	3 File and Directory Discovery	Remote Desktop Protocol	1 Clipboard Data	1 Ingress Tool Transfer	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	1 DLL Side-Loading	11 Process Injection	Security Account Manager	23 System Information Discovery	SMB/Windows Admin Shares	Data from Network Shared Drive	2 Non-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	System Network Configuration Discovery	Distributed Component Object Model	Input Capture	13 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	Internet Connection Discovery	SSH	Keylogging	Fallback Channels	Scheduled Transfer	Data Encrypted for Impact

Behavior Graph

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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.

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Windows Analysis Report
oAuym78xev.exe

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Threat Intel

Malware Configuration

Yara Signatures

Memory Dumps

Sigma Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Compliance

Spreading

Networking

Key, Mouse, Clipboard, Microphone and Screen Capturing

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

Thumbnails

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Windows Analysis Report oAuym78xev.exe

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Threat Intel

Malware Configuration

Yara Signatures

Memory Dumps

Sigma Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Compliance

Spreading

Networking

Key, Mouse, Clipboard, Microphone and Screen Capturing

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

Thumbnails

Windows Analysis Report
oAuym78xev.exe