Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
02/06/2024, 19:08
General
- Target 8f1bf9910778b160532b98f5f0489d44_JaffaCakes118.exe
- Size 1.1MB
- Sample240602-xtjz6abg3v
- SHA256 59ca7344c797ca5852080de0fb530162e8e17d4cc253d15c8975a0b87238631f
Malware Config
Signatures
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Modifies registry key 1 TTPs 1 IoCs
- Suspicious use of FindShellTrayWindow 4 IoCs
- Suspicious use of SendNotifyMessage 4 IoCs
- Suspicious use of SetWindowsHookEx 3 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\8f1bf9910778b160532b98f5f0489d44_JaffaCakes118.exe"C:\Users\Admin\AppData\Local\Temp\8f1bf9910778b160532b98f5f0489d44_JaffaCakes118.exe"1⤵
- Checks computer location settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /SC HOURLY /MO 23 /TN "Brynets" /TR "reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "\""Brynets"\"" /f /t REG_SZ /d "\""C:\ProgramData\Cheetie.exe\""2⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /run /tn "Brynets"2⤵
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C:\ProgramData\Cheetie.exe"C:\ProgramData\Cheetie.exe"2⤵
- Executes dropped EXE
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
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C:\Windows\system32\reg.EXEC:\Windows\system32\reg.EXE add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v "Brynets" /f /t REG_SZ /d "C:\ProgramData\Cheetie.exe"1⤵
- Adds Run key to start application
- Modifies registry key
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Cheetie.exe
memory/752-2-0x00000000773F1000-0x0000000077511000-memory.dmp
memory/752-14-0x00000000773F1000-0x0000000077511000-memory.dmp
memory/4596-18-0x0000000000400000-0x000000000041F000-memory.dmp
memory/4596-21-0x0000000000400000-0x000000000041F000-memory.dmp
memory/4596-22-0x0000000000400000-0x000000000041F000-memory.dmp
memory/4596-23-0x0000000000400000-0x0000000000529000-memory.dmp
memory/4596-29-0x0000000000400000-0x000000000041F000-memory.dmp
memory/4596-30-0x0000000000400000-0x0000000000529000-memory.dmp