Analysis
- max time kernel
149s - max time network
128s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
09/08/2024, 21:16
General
- Target 8393b965a4159ab6400d46899c943af1_JaffaCakes118.exe
- Size 234KB
- Sample240809-z4lb3stbrc
- SHA256 a243b4d437e5381ce22852e3bc6f6621dfaf8a618526d37d4e763a43c5634c07
Malware Config
Extracted
-
darkcomet
-
Guest16
-
127.0.0.1:1604
-
DC_MUTEX-F54S21D
-
InstallPath
MSDCSC\msdcsc.exe
-
gencode
VzpgEE93M5fr
-
install
true
-
offline_keylogger
true
-
persistence
false
-
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
- 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 12 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- 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).
- 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\8393b965a4159ab6400d46899c943af1_JaffaCakes118.exe"C:\Users\Admin\AppData\Local\Temp\8393b965a4159ab6400d46899c943af1_JaffaCakes118.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
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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=4336,i,8293235976513689021,7261015831736501466,262144 --variations-seed-version --mojo-platform-channel-handle=4324 /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Replay Monitor
Loading Replay Monitor...
Downloads
msdcsc.exe
memory/1448-22-0x0000000000400000-0x00000000004BB000-memory.dmp
memory/1448-21-0x0000000000400000-0x00000000004BB000-memory.dmp
memory/1448-32-0x0000000000400000-0x00000000004BB000-memory.dmp
memory/1448-16-0x00000000007E0000-0x00000000007E1000-memory.dmp
memory/1448-17-0x0000000000400000-0x00000000004BB000-memory.dmp
memory/1448-19-0x0000000000400000-0x00000000004BB000-memory.dmp
memory/1448-20-0x00000000007E0000-0x00000000007E1000-memory.dmp
memory/1448-27-0x0000000000400000-0x00000000004BB000-memory.dmp
memory/1448-26-0x0000000000400000-0x00000000004BB000-memory.dmp
memory/1448-23-0x0000000000400000-0x00000000004BB000-memory.dmp
memory/1448-24-0x0000000000400000-0x00000000004BB000-memory.dmp
memory/3328-0-0x0000000000400000-0x00000000004BB000-memory.dmp
memory/3328-1-0x0000000000990000-0x0000000000991000-memory.dmp
memory/3328-14-0x0000000000400000-0x00000000004BB000-memory.dmp