darkcomet | 0eb05ea65682f093007fd38a0bfa99b66a3a059b54dbb8a1ce4bae7c0d890059

Analysis

max time kernel
150s
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
07-12-2024 01:35

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General

Target

d00c31822087142a7addaf6051bd0812_JaffaCakes118.exe
Size

449KB
MD5

d00c31822087142a7addaf6051bd0812
SHA1

c02363c122ea1a2dc1a6a48037ec7d06f3908caf
SHA256

0eb05ea65682f093007fd38a0bfa99b66a3a059b54dbb8a1ce4bae7c0d890059
SHA512

86152091d1df0a12c906a5f4cdb9e1e1d8f8762ec77fc4136fffadc338d0f6d5009d7c9da317cba62f161d928c61d26d155e1a1ee53ca9fb598a457743e157b6
SSDEEP

12288:pVTHy8bZiuDS925JNwbdM9VQasIwe3/Sckv9Yf:phtbgr925J2baQahVMFYf

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:\\Users\\Admin\\AppData\\Roaming\\Windupdt\\winupdate.exe"	splash.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	splash.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	splash.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	d00c31822087142a7addaf6051bd0812_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
3804	splash.exe
1340	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-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Roaming\\Windupdt\\winupdate.exe"	splash.exe

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 3 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	splash.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d00c31822087142a7addaf6051bd0812_JaffaCakes118.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	splash.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	splash.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	splash.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	splash.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	splash.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	splash.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1340	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3804	splash.exe
Token: SeSecurityPrivilege	3804	splash.exe
Token: SeTakeOwnershipPrivilege	3804	splash.exe
Token: SeLoadDriverPrivilege	3804	splash.exe
Token: SeSystemProfilePrivilege	3804	splash.exe
Token: SeSystemtimePrivilege	3804	splash.exe
Token: SeProfSingleProcessPrivilege	3804	splash.exe
Token: SeIncBasePriorityPrivilege	3804	splash.exe
Token: SeCreatePagefilePrivilege	3804	splash.exe
Token: SeBackupPrivilege	3804	splash.exe
Token: SeRestorePrivilege	3804	splash.exe
Token: SeShutdownPrivilege	3804	splash.exe
Token: SeDebugPrivilege	3804	splash.exe
Token: SeSystemEnvironmentPrivilege	3804	splash.exe
Token: SeChangeNotifyPrivilege	3804	splash.exe
Token: SeRemoteShutdownPrivilege	3804	splash.exe
Token: SeUndockPrivilege	3804	splash.exe
Token: SeManageVolumePrivilege	3804	splash.exe
Token: SeImpersonatePrivilege	3804	splash.exe
Token: SeCreateGlobalPrivilege	3804	splash.exe
Token: 33	3804	splash.exe
Token: 34	3804	splash.exe
Token: 35	3804	splash.exe
Token: 36	3804	splash.exe
Token: SeIncreaseQuotaPrivilege	1340	winupdate.exe
Token: SeSecurityPrivilege	1340	winupdate.exe
Token: SeTakeOwnershipPrivilege	1340	winupdate.exe
Token: SeLoadDriverPrivilege	1340	winupdate.exe
Token: SeSystemProfilePrivilege	1340	winupdate.exe
Token: SeSystemtimePrivilege	1340	winupdate.exe
Token: SeProfSingleProcessPrivilege	1340	winupdate.exe
Token: SeIncBasePriorityPrivilege	1340	winupdate.exe
Token: SeCreatePagefilePrivilege	1340	winupdate.exe
Token: SeBackupPrivilege	1340	winupdate.exe
Token: SeRestorePrivilege	1340	winupdate.exe
Token: SeShutdownPrivilege	1340	winupdate.exe
Token: SeDebugPrivilege	1340	winupdate.exe
Token: SeSystemEnvironmentPrivilege	1340	winupdate.exe
Token: SeChangeNotifyPrivilege	1340	winupdate.exe
Token: SeRemoteShutdownPrivilege	1340	winupdate.exe
Token: SeUndockPrivilege	1340	winupdate.exe
Token: SeManageVolumePrivilege	1340	winupdate.exe
Token: SeImpersonatePrivilege	1340	winupdate.exe
Token: SeCreateGlobalPrivilege	1340	winupdate.exe
Token: 33	1340	winupdate.exe
Token: 34	1340	winupdate.exe
Token: 35	1340	winupdate.exe
Token: 36	1340	winupdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 3804	2904	d00c31822087142a7addaf6051bd0812_JaffaCakes118.exe	84
PID 2904 wrote to memory of 3804	2904	d00c31822087142a7addaf6051bd0812_JaffaCakes118.exe	84
PID 2904 wrote to memory of 3804	2904	d00c31822087142a7addaf6051bd0812_JaffaCakes118.exe	84
PID 3804 wrote to memory of 1340	3804	splash.exe	85
PID 3804 wrote to memory of 1340	3804	splash.exe	85
PID 3804 wrote to memory of 1340	3804	splash.exe	85

C:\Users\Admin\AppData\Local\Temp\d00c31822087142a7addaf6051bd0812_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d00c31822087142a7addaf6051bd0812_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2904
- C:\Users\Admin\AppData\Local\Temp\splash.exe
  "C:\Users\Admin\AppData\Local\Temp\splash.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3804
- - C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe
    "C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe"
    3⤵
    - 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 behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:1340

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:\Users\Admin\AppData\Local\Temp\splash.exe

Filesize
276KB

MD5
8ba1a492c6bf52df90cd908fbaca88ba

SHA1
3df03cf51ed0f09dabb77ed8dda9be7c687d6e7f

SHA256
b81048c7c949e1f453f20ab5d0d58cafa48b98b91d2f7a4ee92aff4af655eeab

SHA512
70053dd61676672ec49602d74ee82e0b6f01e2f024015a3618c516a36efeddd71f6a1827715dd1fdd3c0f307a4f528570d4d63571de0d10e664f71e96428107b

Download Submit
memory/1340-52-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-61-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-51-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-46-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-47-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-48-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-49-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-50-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-60-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-59-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-54-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-53-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-55-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-56-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-57-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/1340-58-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/3804-10-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/3804-45-0x0000000000400000-0x00000000004CAE40-memory.dmp

Filesize
811KB

Download
memory/3804-9-0x0000000000400000-0x0000000000401000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads