darkcomet | 07bb3b2e7cf89aba283ffd7af3daba65b50fcd620a25fb945cc85e7d64b9094b

Analysis

max time kernel
149s
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
30-12-2024 00:01

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General

Target

xcgb.exe
Size

745KB
MD5

c0e4f49d4ea30fe8e04fdba223b44f24
SHA1

42d85163e18f35fd435b5f96a0bce10b8336b440
SHA256

230351e5b4ee08a6583797d942967b059aec63c32eb26427f45d4ff64701b3fe
SHA512

127923ce8310070ef1083b66f92ad5b7faeabb29f2540554fd833e6132d85478f55415344127760f04fe44a7ef8a0acd243d1dec5279510567a4a64777911abc
SSDEEP

12288:w8UaT9XY2siA0bMG09xD7I3Gg8ecgVvfBoCDBOQQYbVXpuy1f/gORixB:pUKoN0bUxgGa/pfBHDb+y1HgZ

Score

10^/10

darkcomet discovery evasion 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\\Documents\\MSDCSC\\darkcomet.exe"	xcgb.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2160	attrib.exe
4544	attrib.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	xcgb.exe

Executes dropped EXE 1 IoCs

pid	Process
1300	darkcomet.exe

Adds Run key to start application 2 TTPs 3 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\DarkCometInstall = "C:\\Users\\Admin\\Documents\\MSDCSC\\darkcomet.exe"	darkcomet.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\DarkCometInstall = "C:\\Users\\Admin\\Documents\\MSDCSC\\darkcomet.exe"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\DarkCometInstall = "C:\\Users\\Admin\\Documents\\MSDCSC\\darkcomet.exe"	xcgb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1300 set thread context of 4476	1300	darkcomet.exe	88

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 7 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	xcgb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	darkcomet.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4476	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1760	xcgb.exe
Token: SeSecurityPrivilege	1760	xcgb.exe
Token: SeTakeOwnershipPrivilege	1760	xcgb.exe
Token: SeLoadDriverPrivilege	1760	xcgb.exe
Token: SeSystemProfilePrivilege	1760	xcgb.exe
Token: SeSystemtimePrivilege	1760	xcgb.exe
Token: SeProfSingleProcessPrivilege	1760	xcgb.exe
Token: SeIncBasePriorityPrivilege	1760	xcgb.exe
Token: SeCreatePagefilePrivilege	1760	xcgb.exe
Token: SeBackupPrivilege	1760	xcgb.exe
Token: SeRestorePrivilege	1760	xcgb.exe
Token: SeShutdownPrivilege	1760	xcgb.exe
Token: SeDebugPrivilege	1760	xcgb.exe
Token: SeSystemEnvironmentPrivilege	1760	xcgb.exe
Token: SeChangeNotifyPrivilege	1760	xcgb.exe
Token: SeRemoteShutdownPrivilege	1760	xcgb.exe
Token: SeUndockPrivilege	1760	xcgb.exe
Token: SeManageVolumePrivilege	1760	xcgb.exe
Token: SeImpersonatePrivilege	1760	xcgb.exe
Token: SeCreateGlobalPrivilege	1760	xcgb.exe
Token: 33	1760	xcgb.exe
Token: 34	1760	xcgb.exe
Token: 35	1760	xcgb.exe
Token: 36	1760	xcgb.exe
Token: SeIncreaseQuotaPrivilege	1300	darkcomet.exe
Token: SeSecurityPrivilege	1300	darkcomet.exe
Token: SeTakeOwnershipPrivilege	1300	darkcomet.exe
Token: SeLoadDriverPrivilege	1300	darkcomet.exe
Token: SeSystemProfilePrivilege	1300	darkcomet.exe
Token: SeSystemtimePrivilege	1300	darkcomet.exe
Token: SeProfSingleProcessPrivilege	1300	darkcomet.exe
Token: SeIncBasePriorityPrivilege	1300	darkcomet.exe
Token: SeCreatePagefilePrivilege	1300	darkcomet.exe
Token: SeBackupPrivilege	1300	darkcomet.exe
Token: SeRestorePrivilege	1300	darkcomet.exe
Token: SeShutdownPrivilege	1300	darkcomet.exe
Token: SeDebugPrivilege	1300	darkcomet.exe
Token: SeSystemEnvironmentPrivilege	1300	darkcomet.exe
Token: SeChangeNotifyPrivilege	1300	darkcomet.exe
Token: SeRemoteShutdownPrivilege	1300	darkcomet.exe
Token: SeUndockPrivilege	1300	darkcomet.exe
Token: SeManageVolumePrivilege	1300	darkcomet.exe
Token: SeImpersonatePrivilege	1300	darkcomet.exe
Token: SeCreateGlobalPrivilege	1300	darkcomet.exe
Token: 33	1300	darkcomet.exe
Token: 34	1300	darkcomet.exe
Token: 35	1300	darkcomet.exe
Token: 36	1300	darkcomet.exe
Token: SeIncreaseQuotaPrivilege	4476	iexplore.exe
Token: SeSecurityPrivilege	4476	iexplore.exe
Token: SeTakeOwnershipPrivilege	4476	iexplore.exe
Token: SeLoadDriverPrivilege	4476	iexplore.exe
Token: SeSystemProfilePrivilege	4476	iexplore.exe
Token: SeSystemtimePrivilege	4476	iexplore.exe
Token: SeProfSingleProcessPrivilege	4476	iexplore.exe
Token: SeIncBasePriorityPrivilege	4476	iexplore.exe
Token: SeCreatePagefilePrivilege	4476	iexplore.exe
Token: SeBackupPrivilege	4476	iexplore.exe
Token: SeRestorePrivilege	4476	iexplore.exe
Token: SeShutdownPrivilege	4476	iexplore.exe
Token: SeDebugPrivilege	4476	iexplore.exe
Token: SeSystemEnvironmentPrivilege	4476	iexplore.exe
Token: SeChangeNotifyPrivilege	4476	iexplore.exe
Token: SeRemoteShutdownPrivilege	4476	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4476	iexplore.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 2340	1760	xcgb.exe	82
PID 1760 wrote to memory of 2340	1760	xcgb.exe	82
PID 1760 wrote to memory of 2340	1760	xcgb.exe	82
PID 1760 wrote to memory of 432	1760	xcgb.exe	84
PID 1760 wrote to memory of 432	1760	xcgb.exe	84
PID 1760 wrote to memory of 432	1760	xcgb.exe	84
PID 1760 wrote to memory of 1300	1760	xcgb.exe	86
PID 1760 wrote to memory of 1300	1760	xcgb.exe	86
PID 1760 wrote to memory of 1300	1760	xcgb.exe	86
PID 2340 wrote to memory of 4544	2340	cmd.exe	87
PID 2340 wrote to memory of 4544	2340	cmd.exe	87
PID 2340 wrote to memory of 4544	2340	cmd.exe	87
PID 432 wrote to memory of 2160	432	cmd.exe	89
PID 432 wrote to memory of 2160	432	cmd.exe	89
PID 432 wrote to memory of 2160	432	cmd.exe	89
PID 1300 wrote to memory of 4476	1300	darkcomet.exe	88
PID 1300 wrote to memory of 4476	1300	darkcomet.exe	88
PID 1300 wrote to memory of 4476	1300	darkcomet.exe	88
PID 1300 wrote to memory of 4476	1300	darkcomet.exe	88
PID 1300 wrote to memory of 4476	1300	darkcomet.exe	88

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4544	attrib.exe
2160	attrib.exe

C:\Users\Admin\AppData\Local\Temp\xcgb.exe
"C:\Users\Admin\AppData\Local\Temp\xcgb.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
PID:1760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\xcgb.exe" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2340
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\xcgb.exe" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:4544
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:432
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:2160
- C:\Users\Admin\Documents\MSDCSC\darkcomet.exe
  "C:\Users\Admin\Documents\MSDCSC\darkcomet.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1300
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4476

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

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\Documents\MSDCSC\darkcomet.exe

Filesize
745KB

MD5
c0e4f49d4ea30fe8e04fdba223b44f24

SHA1
42d85163e18f35fd435b5f96a0bce10b8336b440

SHA256
230351e5b4ee08a6583797d942967b059aec63c32eb26427f45d4ff64701b3fe

SHA512
127923ce8310070ef1083b66f92ad5b7faeabb29f2540554fd833e6132d85478f55415344127760f04fe44a7ef8a0acd243d1dec5279510567a4a64777911abc

Download Submit
memory/1300-14-0x00000000007F0000-0x00000000007F1000-memory.dmp

Filesize
4KB

Download
memory/1300-16-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1760-0-0x0000000002420000-0x0000000002421000-memory.dmp

Filesize
4KB

Download
memory/1760-13-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/4476-15-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads