Analysis
- max time kernel
150s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20250129-en - resource tags
- submitted
29/01/2025, 08:19
General
- Target JaffaCakes118_54ad41a42e0c7ee4443a9be89ca534fe.exe
- Size 756KB
- Sample250129-j7261askft
- SHA256 7ae251af1210de14be1b1729c5d8a5912d0abbd0279f05eab5acaf62d5cded51
Malware Config
Extracted
-
darkcomet
-
Guest16
-
appelsap.no-ip.org:86
-
DC_MUTEX-KFF0744
-
InstallPath
LocalUpdates\Updater.exe
-
gencode
oqbAtc4bt3Sc
-
install
true
-
offline_keylogger
true
-
persistence
false
-
reg_key
UpdateSteamCrack
Signatures
- Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
- Darkcomet family
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Modifies firewall policy service 3 TTPs 3 IoCs
- Modifies security service 2 TTPs 1 IoCs
- 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
- Drops file in System32 directory 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious use of AdjustPrivilegeToken 48 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_54ad41a42e0c7ee4443a9be89ca534fe.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_54ad41a42e0c7ee4443a9be89ca534fe.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\LocalUpdates\Updater.exe"C:\Windows\system32\LocalUpdates\Updater.exe"2⤵
- Modifies firewall policy service
- Modifies security service
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Defense Evasion
Impair Defenses
1Disable or Modify System Firewall
1Modify Registry
4Replay Monitor
Loading Replay Monitor...
Downloads
Updater.exe
memory/3596-19-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-21-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-28-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-15-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-16-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-17-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-18-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-27-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-13-0x00000000022B0000-0x00000000022B1000-memory.dmp
memory/3596-22-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-20-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-23-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-24-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-25-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/3596-26-0x0000000000400000-0x00000000004CA000-memory.dmp
memory/4592-0-0x0000000002380000-0x0000000002381000-memory.dmp
memory/4592-14-0x0000000000400000-0x00000000004CA000-memory.dmp