darkcomet | 07bb3b2e7cf89aba283ffd7af3daba65b50fcd620a25fb945cc85e7d64b9094b

Analysis

max time kernel
141s
max time network
141s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-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
2916	attrib.exe
2708	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
3048	darkcomet.exe

Loads dropped DLL 2 IoCs

pid	Process
1600	xcgb.exe
1600	xcgb.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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\DarkCometInstall = "C:\\Users\\Admin\\Documents\\MSDCSC\\darkcomet.exe"	xcgb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\DarkCometInstall = "C:\\Users\\Admin\\Documents\\MSDCSC\\darkcomet.exe"	darkcomet.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\DarkCometInstall = "C:\\Users\\Admin\\Documents\\MSDCSC\\darkcomet.exe"	iexplore.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3048 set thread context of 2976	3048	darkcomet.exe	37

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

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2976	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1600	xcgb.exe
Token: SeSecurityPrivilege	1600	xcgb.exe
Token: SeTakeOwnershipPrivilege	1600	xcgb.exe
Token: SeLoadDriverPrivilege	1600	xcgb.exe
Token: SeSystemProfilePrivilege	1600	xcgb.exe
Token: SeSystemtimePrivilege	1600	xcgb.exe
Token: SeProfSingleProcessPrivilege	1600	xcgb.exe
Token: SeIncBasePriorityPrivilege	1600	xcgb.exe
Token: SeCreatePagefilePrivilege	1600	xcgb.exe
Token: SeBackupPrivilege	1600	xcgb.exe
Token: SeRestorePrivilege	1600	xcgb.exe
Token: SeShutdownPrivilege	1600	xcgb.exe
Token: SeDebugPrivilege	1600	xcgb.exe
Token: SeSystemEnvironmentPrivilege	1600	xcgb.exe
Token: SeChangeNotifyPrivilege	1600	xcgb.exe
Token: SeRemoteShutdownPrivilege	1600	xcgb.exe
Token: SeUndockPrivilege	1600	xcgb.exe
Token: SeManageVolumePrivilege	1600	xcgb.exe
Token: SeImpersonatePrivilege	1600	xcgb.exe
Token: SeCreateGlobalPrivilege	1600	xcgb.exe
Token: 33	1600	xcgb.exe
Token: 34	1600	xcgb.exe
Token: 35	1600	xcgb.exe
Token: SeIncreaseQuotaPrivilege	3048	darkcomet.exe
Token: SeSecurityPrivilege	3048	darkcomet.exe
Token: SeTakeOwnershipPrivilege	3048	darkcomet.exe
Token: SeLoadDriverPrivilege	3048	darkcomet.exe
Token: SeSystemProfilePrivilege	3048	darkcomet.exe
Token: SeSystemtimePrivilege	3048	darkcomet.exe
Token: SeProfSingleProcessPrivilege	3048	darkcomet.exe
Token: SeIncBasePriorityPrivilege	3048	darkcomet.exe
Token: SeCreatePagefilePrivilege	3048	darkcomet.exe
Token: SeBackupPrivilege	3048	darkcomet.exe
Token: SeRestorePrivilege	3048	darkcomet.exe
Token: SeShutdownPrivilege	3048	darkcomet.exe
Token: SeDebugPrivilege	3048	darkcomet.exe
Token: SeSystemEnvironmentPrivilege	3048	darkcomet.exe
Token: SeChangeNotifyPrivilege	3048	darkcomet.exe
Token: SeRemoteShutdownPrivilege	3048	darkcomet.exe
Token: SeUndockPrivilege	3048	darkcomet.exe
Token: SeManageVolumePrivilege	3048	darkcomet.exe
Token: SeImpersonatePrivilege	3048	darkcomet.exe
Token: SeCreateGlobalPrivilege	3048	darkcomet.exe
Token: 33	3048	darkcomet.exe
Token: 34	3048	darkcomet.exe
Token: 35	3048	darkcomet.exe
Token: SeIncreaseQuotaPrivilege	2976	iexplore.exe
Token: SeSecurityPrivilege	2976	iexplore.exe
Token: SeTakeOwnershipPrivilege	2976	iexplore.exe
Token: SeLoadDriverPrivilege	2976	iexplore.exe
Token: SeSystemProfilePrivilege	2976	iexplore.exe
Token: SeSystemtimePrivilege	2976	iexplore.exe
Token: SeProfSingleProcessPrivilege	2976	iexplore.exe
Token: SeIncBasePriorityPrivilege	2976	iexplore.exe
Token: SeCreatePagefilePrivilege	2976	iexplore.exe
Token: SeBackupPrivilege	2976	iexplore.exe
Token: SeRestorePrivilege	2976	iexplore.exe
Token: SeShutdownPrivilege	2976	iexplore.exe
Token: SeDebugPrivilege	2976	iexplore.exe
Token: SeSystemEnvironmentPrivilege	2976	iexplore.exe
Token: SeChangeNotifyPrivilege	2976	iexplore.exe
Token: SeRemoteShutdownPrivilege	2976	iexplore.exe
Token: SeUndockPrivilege	2976	iexplore.exe
Token: SeManageVolumePrivilege	2976	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2976	iexplore.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1600 wrote to memory of 2888	1600	xcgb.exe	30
PID 1600 wrote to memory of 2888	1600	xcgb.exe	30
PID 1600 wrote to memory of 2888	1600	xcgb.exe	30
PID 1600 wrote to memory of 2888	1600	xcgb.exe	30
PID 1600 wrote to memory of 2892	1600	xcgb.exe	31
PID 1600 wrote to memory of 2892	1600	xcgb.exe	31
PID 1600 wrote to memory of 2892	1600	xcgb.exe	31
PID 1600 wrote to memory of 2892	1600	xcgb.exe	31
PID 1600 wrote to memory of 3048	1600	xcgb.exe	34
PID 1600 wrote to memory of 3048	1600	xcgb.exe	34
PID 1600 wrote to memory of 3048	1600	xcgb.exe	34
PID 1600 wrote to memory of 3048	1600	xcgb.exe	34
PID 2892 wrote to memory of 2916	2892	cmd.exe	35
PID 2892 wrote to memory of 2916	2892	cmd.exe	35
PID 2892 wrote to memory of 2916	2892	cmd.exe	35
PID 2892 wrote to memory of 2916	2892	cmd.exe	35
PID 2888 wrote to memory of 2708	2888	cmd.exe	36
PID 2888 wrote to memory of 2708	2888	cmd.exe	36
PID 2888 wrote to memory of 2708	2888	cmd.exe	36
PID 2888 wrote to memory of 2708	2888	cmd.exe	36
PID 3048 wrote to memory of 2976	3048	darkcomet.exe	37
PID 3048 wrote to memory of 2976	3048	darkcomet.exe	37
PID 3048 wrote to memory of 2976	3048	darkcomet.exe	37
PID 3048 wrote to memory of 2976	3048	darkcomet.exe	37
PID 3048 wrote to memory of 2976	3048	darkcomet.exe	37
PID 3048 wrote to memory of 2976	3048	darkcomet.exe	37

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2916	attrib.exe
2708	attrib.exe

C:\Users\Admin\AppData\Local\Temp\xcgb.exe
"C:\Users\Admin\AppData\Local\Temp\xcgb.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1600
- 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:2888
- - 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:2708
- 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:2892
- - 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:2916
- 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:3048
- - 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:2976

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

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/1600-0-0x00000000002A0000-0x00000000002A1000-memory.dmp

Filesize
4KB

Download
memory/1600-11-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/2976-13-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/3048-14-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads