darkcomet | 78b62ef5ac9210da0730a60efb9d5a88d3cc985b177245ecf26217c2f5fd589e

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-10-2024 10:46

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General

Target

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Size

895KB
MD5

6a19777b81fa1b38bd3dc31922e0f18f
SHA1

7fbef3be7d6dead64878d6fa588fb2c7dc0228d3
SHA256

78b62ef5ac9210da0730a60efb9d5a88d3cc985b177245ecf26217c2f5fd589e
SHA512

96d9edf3dbfae5601c851becfaf18dfe19f95101c47582be78c77057093437182f5655290dc8384a2344289bfbb8ac4a5692251759470bec6b35dba671f007a5
SSDEEP

12288:8qxGhuABkqjSxNLsF6jhdHZGsX4c3CvjKUJuN6OZt8tHY4a+YsTqErMcxP3K:8qxUuA6qOxNLc6j/5h46CDusOunTfnxS

Score

10^/10

darkcomet discovery persistence rat trojan

Malware Config

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exewinupdate.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

Processes:

winupdate.exewinupdate.exe

pid	Process
2796	winupdate.exe
1444	winupdate.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe

Drops file in System32 directory 1 IoCs

Processes:

explorer.exe

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\explorer.exe	explorer.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exewinupdate.exewinupdate.exe

description	pid	Process	procid_target
PID 2180 set thread context of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2796 set thread context of 1444	2796	winupdate.exe	89
PID 1444 set thread context of 2036	1444	winupdate.exe	90

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exewinupdate.exewinupdate.exeexplorer.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Checks processor information in registry 2 TTPs 8 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exewinupdate.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	winupdate.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exewinupdate.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exewinupdate.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeSecurityPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeSystemtimePrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeBackupPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeRestorePrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeShutdownPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeDebugPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeUndockPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeManageVolumePrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeImpersonatePrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: 33	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: 34	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: 35	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: 36	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	1444	winupdate.exe
Token: SeSecurityPrivilege	1444	winupdate.exe
Token: SeTakeOwnershipPrivilege	1444	winupdate.exe
Token: SeLoadDriverPrivilege	1444	winupdate.exe
Token: SeSystemProfilePrivilege	1444	winupdate.exe
Token: SeSystemtimePrivilege	1444	winupdate.exe
Token: SeProfSingleProcessPrivilege	1444	winupdate.exe
Token: SeIncBasePriorityPrivilege	1444	winupdate.exe
Token: SeCreatePagefilePrivilege	1444	winupdate.exe
Token: SeBackupPrivilege	1444	winupdate.exe
Token: SeRestorePrivilege	1444	winupdate.exe
Token: SeShutdownPrivilege	1444	winupdate.exe
Token: SeDebugPrivilege	1444	winupdate.exe
Token: SeSystemEnvironmentPrivilege	1444	winupdate.exe
Token: SeChangeNotifyPrivilege	1444	winupdate.exe
Token: SeRemoteShutdownPrivilege	1444	winupdate.exe
Token: SeUndockPrivilege	1444	winupdate.exe
Token: SeManageVolumePrivilege	1444	winupdate.exe
Token: SeImpersonatePrivilege	1444	winupdate.exe
Token: SeCreateGlobalPrivilege	1444	winupdate.exe
Token: 33	1444	winupdate.exe
Token: 34	1444	winupdate.exe
Token: 35	1444	winupdate.exe
Token: 36	1444	winupdate.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exewinupdate.exeexplorer.exe

pid	Process
2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
2796	winupdate.exe
2036	explorer.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exewinupdate.exewinupdate.exe

description	pid	Process	procid_target
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 2180 wrote to memory of 4068	2180	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	84
PID 4068 wrote to memory of 2588	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	85
PID 4068 wrote to memory of 2588	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	85
PID 4068 wrote to memory of 2588	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	85
PID 4068 wrote to memory of 2796	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	88
PID 4068 wrote to memory of 2796	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	88
PID 4068 wrote to memory of 2796	4068	6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe	88
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 2796 wrote to memory of 1444	2796	winupdate.exe	89
PID 1444 wrote to memory of 2036	1444	winupdate.exe	90
PID 1444 wrote to memory of 2036	1444	winupdate.exe	90
PID 1444 wrote to memory of 2036	1444	winupdate.exe	90
PID 1444 wrote to memory of 2036	1444	winupdate.exe	90
PID 1444 wrote to memory of 2036	1444	winupdate.exe	90

C:\Users\Admin\AppData\Local\Temp\6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2180
- C:\Users\Admin\AppData\Local\Temp\6a19777b81fa1b38bd3dc31922e0f18f_JaffaCakes118.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4068
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    PID:2588
- - C:\Windupdt\winupdate.exe
    "C:\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2796
  - - C:\Windupdt\winupdate.exe
      4⤵
      Checks BIOS information in registry
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1444
    - - C:\Windows\SysWOW64\explorer.exe
        
        "C:\Windows\SysWOW64\explorer.exe"
        5⤵
        Drops file in System32 directory
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2036

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windupdt\winupdate.exe

Filesize
895KB

MD5
6a19777b81fa1b38bd3dc31922e0f18f

SHA1
7fbef3be7d6dead64878d6fa588fb2c7dc0228d3

SHA256
78b62ef5ac9210da0730a60efb9d5a88d3cc985b177245ecf26217c2f5fd589e

SHA512
96d9edf3dbfae5601c851becfaf18dfe19f95101c47582be78c77057093437182f5655290dc8384a2344289bfbb8ac4a5692251759470bec6b35dba671f007a5

Download Submit
memory/1444-29-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1444-28-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1444-30-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1444-32-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2036-34-0x0000000000400000-0x0000000000447000-memory.dmp

Filesize
284KB

Download
memory/2036-31-0x0000000000400000-0x0000000000447000-memory.dmp

Filesize
284KB

Download
memory/4068-4-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4068-5-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4068-6-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4068-7-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4068-2-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4068-19-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4068-3-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download