Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
06/03/2024, 05:53
General
- Target b6ab3d7bdb56f0c8c26d91eae185b923.exe
- Size 647KB
- Sample240306-gllwsacd5v
- SHA256 53acd5f520a5a12605e262e8ac057dc58652bb31adabe17e319e4638e73a51d2
Malware Config
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 2 TTPs 3 IoCs
- Windows security bypass 2 TTPs 1 IoCs
- Drops file in Drivers directory 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
- Windows security modification 2 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Modifies registry class 1 IoCs
- 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\b6ab3d7bdb56f0c8c26d91eae185b923.exe"C:\Users\Admin\AppData\Local\Temp\b6ab3d7bdb56f0c8c26d91eae185b923.exe"1⤵
- Modifies WinLogon for persistence
- Drops file in Drivers directory
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"2⤵
- Modifies firewall policy service
- Windows security bypass
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- 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
1Windows Service
1Replay Monitor
Loading Replay Monitor...
Downloads
msdcsc.exe
memory/3424-66-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/3424-63-0x0000000002700000-0x0000000002701000-memory.dmp
memory/3424-64-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/3424-65-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/3424-67-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/3424-68-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/3424-69-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/3424-70-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/3424-71-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/3424-76-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/4896-62-0x0000000000400000-0x00000000004AF000-memory.dmp
memory/4896-0-0x0000000002390000-0x0000000002391000-memory.dmp