darkcomet | 1fa7e74c0d21f999c2f9ad0c080e324ac02b667d1b4814e766d55311b919c17f

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-12-2024 19:22

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General

Target

d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Size

688KB
MD5

d3398c0f3840bd9f87a7cbc161c7a525
SHA1

482006b6d7e63f08376ccb36c0ddcac005ad052d
SHA256

1fa7e74c0d21f999c2f9ad0c080e324ac02b667d1b4814e766d55311b919c17f
SHA512

eb327bb376b54ee101f94999609bd3f7119edbaf9e5b6e214e1d1dd67349595e8fc67575904892b018fc39267d8d9dd30d4c9184580ec4f620c9e5516ac0b0e6
SSDEEP

12288:dzfULRmROHbwBqtOxbvuhgMtS/42LBEKIT87S0+ONA1TPK5LapDZrW:VfaR9GqcuKh/42tE/O+OuuyDZy

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
Darkcomet family
darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	d3398c0f3840bd9f87a7cbc161c7a525_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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	d3398c0f3840bd9f87a7cbc161c7a525_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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
2424	winupdate.exe
556	winupdate.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2840 set thread context of 2296	2840	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	85
PID 2296 set thread context of 3292	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	86
PID 3292 set thread context of 3188	3292	explorer.exe	87
PID 2424 set thread context of 556	2424	winupdate.exe	92

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
820	3188	WerFault.exe	87

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.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

description	ioc	Process
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	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	d3398c0f3840bd9f87a7cbc161c7a525_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

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeSecurityPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeSystemtimePrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeBackupPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeRestorePrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeShutdownPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeDebugPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeUndockPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeManageVolumePrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeImpersonatePrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: 33	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: 34	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: 35	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: 36	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	556	winupdate.exe
Token: SeSecurityPrivilege	556	winupdate.exe
Token: SeTakeOwnershipPrivilege	556	winupdate.exe
Token: SeLoadDriverPrivilege	556	winupdate.exe
Token: SeSystemProfilePrivilege	556	winupdate.exe
Token: SeSystemtimePrivilege	556	winupdate.exe
Token: SeProfSingleProcessPrivilege	556	winupdate.exe
Token: SeIncBasePriorityPrivilege	556	winupdate.exe
Token: SeCreatePagefilePrivilege	556	winupdate.exe
Token: SeBackupPrivilege	556	winupdate.exe
Token: SeRestorePrivilege	556	winupdate.exe
Token: SeShutdownPrivilege	556	winupdate.exe
Token: SeDebugPrivilege	556	winupdate.exe
Token: SeSystemEnvironmentPrivilege	556	winupdate.exe
Token: SeChangeNotifyPrivilege	556	winupdate.exe
Token: SeRemoteShutdownPrivilege	556	winupdate.exe
Token: SeUndockPrivilege	556	winupdate.exe
Token: SeManageVolumePrivilege	556	winupdate.exe
Token: SeImpersonatePrivilege	556	winupdate.exe
Token: SeCreateGlobalPrivilege	556	winupdate.exe
Token: 33	556	winupdate.exe
Token: 34	556	winupdate.exe
Token: 35	556	winupdate.exe
Token: 36	556	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
556	winupdate.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2840 wrote to memory of 2296	2840	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	85
PID 2840 wrote to memory of 2296	2840	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	85
PID 2840 wrote to memory of 2296	2840	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	85
PID 2840 wrote to memory of 2296	2840	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	85
PID 2840 wrote to memory of 2296	2840	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	85
PID 2296 wrote to memory of 3292	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	86
PID 2296 wrote to memory of 3292	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	86
PID 2296 wrote to memory of 3292	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	86
PID 2296 wrote to memory of 3292	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	86
PID 2296 wrote to memory of 3292	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	86
PID 3292 wrote to memory of 3188	3292	explorer.exe	87
PID 3292 wrote to memory of 3188	3292	explorer.exe	87
PID 3292 wrote to memory of 3188	3292	explorer.exe	87
PID 3292 wrote to memory of 3188	3292	explorer.exe	87
PID 2296 wrote to memory of 2424	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	90
PID 2296 wrote to memory of 2424	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	90
PID 2296 wrote to memory of 2424	2296	d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe	90
PID 2424 wrote to memory of 556	2424	winupdate.exe	92
PID 2424 wrote to memory of 556	2424	winupdate.exe	92
PID 2424 wrote to memory of 556	2424	winupdate.exe	92
PID 2424 wrote to memory of 556	2424	winupdate.exe	92
PID 2424 wrote to memory of 556	2424	winupdate.exe	92

C:\Users\Admin\AppData\Local\Temp\d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2840
- C:\Users\Admin\AppData\Local\Temp\d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\d3398c0f3840bd9f87a7cbc161c7a525_JaffaCakes118.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Adds Run key to start application
  - 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:2296
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3292
  - - C:\Windows\SysWOW64\explorer.exe
      C:\Windows\SysWOW64\explorer.exe
      4⤵
      PID:3188
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3188 -s 80
        5⤵
        Program crash
        
        PID:820
- - 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 WriteProcessMemory
    PID:2424
  - - C:\Windupdt\winupdate.exe
      C:\Windupdt\winupdate.exe
      4⤵
      Checks BIOS information in registry
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:556

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3188 -ip 3188
1⤵
PID:3472

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

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Downloads

C:\Windupdt\winupdate.exe

Filesize
688KB

MD5
d3398c0f3840bd9f87a7cbc161c7a525

SHA1
482006b6d7e63f08376ccb36c0ddcac005ad052d

SHA256
1fa7e74c0d21f999c2f9ad0c080e324ac02b667d1b4814e766d55311b919c17f

SHA512
eb327bb376b54ee101f94999609bd3f7119edbaf9e5b6e214e1d1dd67349595e8fc67575904892b018fc39267d8d9dd30d4c9184580ec4f620c9e5516ac0b0e6

Download Submit
memory/556-30-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/556-29-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/556-31-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/556-28-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/556-27-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download
memory/2296-5-0x0000000000800000-0x0000000000801000-memory.dmp

Filesize
4KB

Download
memory/2296-3-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2296-1-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2296-4-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2296-20-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2296-6-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2296-0-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2424-26-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download
memory/2840-2-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download
memory/3292-10-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download
memory/3292-11-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download
memory/3292-9-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download
memory/3292-13-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download
memory/3292-32-0x0000000010000000-0x00000000100B3000-memory.dmp

Filesize
716KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads