Analysis
- max time kernel
149s - max time network
134s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
12/09/2024, 00:56
General
- Target db8885eab92eb94b28dd85a582c7d9bc_JaffaCakes118.exe
- Size 253KB
- Sample240912-banncasfmm
- SHA256 86e3c61091234ba56afe43773830504b3d20fd928bb78c75d87452fb3f029264
Malware Config
Extracted
-
darkcomet
-
Guest16
-
127.0.0.1:81
-
DC_MUTEX-AM1FCPH
-
InstallPath
MSDCSC\msdcsc.exe
-
gencode
9gv6ZKaoctbN
-
install
true
-
offline_keylogger
true
-
persistence
true
-
reg_key
MicroUpdate
Signatures
- Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Modifies firewall policy service 3 TTPs 3 IoCs
- Modifies security service 2 TTPs 1 IoCs
- Windows security bypass 2 TTPs 2 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- UPX packed file 16 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Windows security modification 2 TTPs 2 IoCs
- Adds Run key to start application 2 TTPs 2 IoCs
- Drops file in Windows 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.
- Modifies registry class 1 IoCs
- Suspicious use of AdjustPrivilegeToken 48 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
- System policy modification 1 TTPs 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\db8885eab92eb94b28dd85a582c7d9bc_JaffaCakes118.exe"C:\Users\Admin\AppData\Local\Temp\db8885eab92eb94b28dd85a582c7d9bc_JaffaCakes118.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\MSDCSC\msdcsc.exe"C:\Windows\MSDCSC\msdcsc.exe"2⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- System policy modification
-
-
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4304,i,12198811467968044966,17227406646827438786,262144 --variations-seed-version --mojo-platform-channel-handle=3880 /prefetch:81⤵
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
3Disable or Modify System Firewall
1Disable or Modify Tools
2Modify Registry
7Replay Monitor
Loading Replay Monitor...
Downloads
msdcsc.exe
memory/4880-68-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-71-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-62-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-63-0x00000000008D0000-0x00000000008D1000-memory.dmp
memory/4880-80-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-66-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-67-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-79-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-77-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-73-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-69-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-74-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-75-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4880-76-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4968-1-0x00000000023D0000-0x00000000023D1000-memory.dmp
memory/4968-0-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4968-65-0x0000000000400000-0x00000000004BA000-memory.dmp