darkcomet | a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566

Analysis

max time kernel
149s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
26/04/2026, 19:09

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General

Target
_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Size 757KB
Sample260426-xt19fae13x
SHA256 a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566
MD5 d9ab48ca40d5ff52c62352c014ab623a
SHA1 731c734b87cb5d26d9006cf8265da09d7688b360
SHA512 20e5979ec50705ae4e4730832c62070a3d8fe1c786a1cb10bd67866c0271b247c67fde30b700f4aed5b650f1e86ae585b310fc5876e8728be202ea3fb4a1bf91
SSDEEP 12288:z9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hVO4VZ:9Z1xuVVjfFoynPaVBUR8f+kN10EBTZ
TLSH
T130F47D31B1808837D96239F89C5B92E5582A7E202E29754B3AF63F4C5E39183FD152DF
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

guest56 discovery darkcomet persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest56

kyb.uk.com:1604
acash.gb.net:1604

Mutex

DC_MUTEX-2R68XE1

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
JrrL5yuJ70yy
install
true
offline_keylogger
true
persistence
true
reg_key
MicroUpdate

rc4.plain

Signatures

Family: 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

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\\msdcsc.exe"	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.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-1-5-21-2714754311-527593155-1440850301-1000\Control Panel\International\Geo\Nation	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe

Executes dropped EXE 2 IoCs

pid	Process
4064	msdcsc.exe
4784	msdcsc.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-1-5-21-2714754311-527593155-1440850301-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2714754311-527593155-1440850301-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	msdcsc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2714754311-527593155-1440850301-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	iexplore.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4064 set thread context of 3068	4064	msdcsc.exe	86

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
1936	4996	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	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeSecurityPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeTakeOwnershipPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeLoadDriverPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeSystemProfilePrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeSystemtimePrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeProfSingleProcessPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeIncBasePriorityPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeCreatePagefilePrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeBackupPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeRestorePrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeShutdownPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeDebugPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeSystemEnvironmentPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeChangeNotifyPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeRemoteShutdownPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeUndockPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeManageVolumePrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeImpersonatePrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeCreateGlobalPrivilege	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: 33	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: 34	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: 35	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: 36	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
Token: SeIncreaseQuotaPrivilege	4064	msdcsc.exe
Token: SeSecurityPrivilege	4064	msdcsc.exe
Token: SeTakeOwnershipPrivilege	4064	msdcsc.exe
Token: SeLoadDriverPrivilege	4064	msdcsc.exe
Token: SeSystemProfilePrivilege	4064	msdcsc.exe
Token: SeSystemtimePrivilege	4064	msdcsc.exe
Token: SeProfSingleProcessPrivilege	4064	msdcsc.exe
Token: SeIncBasePriorityPrivilege	4064	msdcsc.exe
Token: SeCreatePagefilePrivilege	4064	msdcsc.exe
Token: SeBackupPrivilege	4064	msdcsc.exe
Token: SeRestorePrivilege	4064	msdcsc.exe
Token: SeShutdownPrivilege	4064	msdcsc.exe
Token: SeDebugPrivilege	4064	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	4064	msdcsc.exe
Token: SeChangeNotifyPrivilege	4064	msdcsc.exe
Token: SeRemoteShutdownPrivilege	4064	msdcsc.exe
Token: SeUndockPrivilege	4064	msdcsc.exe
Token: SeManageVolumePrivilege	4064	msdcsc.exe
Token: SeImpersonatePrivilege	4064	msdcsc.exe
Token: SeCreateGlobalPrivilege	4064	msdcsc.exe
Token: 33	4064	msdcsc.exe
Token: 34	4064	msdcsc.exe
Token: 35	4064	msdcsc.exe
Token: 36	4064	msdcsc.exe
Token: SeIncreaseQuotaPrivilege	3068	iexplore.exe
Token: SeSecurityPrivilege	3068	iexplore.exe
Token: SeTakeOwnershipPrivilege	3068	iexplore.exe
Token: SeLoadDriverPrivilege	3068	iexplore.exe
Token: SeSystemProfilePrivilege	3068	iexplore.exe
Token: SeSystemtimePrivilege	3068	iexplore.exe
Token: SeProfSingleProcessPrivilege	3068	iexplore.exe
Token: SeIncBasePriorityPrivilege	3068	iexplore.exe
Token: SeCreatePagefilePrivilege	3068	iexplore.exe
Token: SeBackupPrivilege	3068	iexplore.exe
Token: SeRestorePrivilege	3068	iexplore.exe
Token: SeShutdownPrivilege	3068	iexplore.exe
Token: SeDebugPrivilege	3068	iexplore.exe
Token: SeSystemEnvironmentPrivilege	3068	iexplore.exe
Token: SeChangeNotifyPrivilege	3068	iexplore.exe
Token: SeRemoteShutdownPrivilege	3068	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3068	iexplore.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 3068	4064	msdcsc.exe	86
PID 4064 wrote to memory of 3068	4064	msdcsc.exe	86
PID 3388 wrote to memory of 4996	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe	87
PID 3388 wrote to memory of 4996	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe	87
PID 3388 wrote to memory of 4784	3388	_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe	90

C:\Users\Admin\AppData\Local\Temp\_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.exe
"C:\Users\Admin\AppData\Local\Temp\_a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566.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:3388
- C:\Windows\SysWOW64\notepad.exe
  notepad
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4996
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4996 -s 72
    3⤵
    - Program crash
    PID:1936
- C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
  "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4784

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
1⤵
- 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:4064
- C:\Program Files (x86)\Internet Explorer\iexplore.exe
  "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:3068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4996 -ip 4996
1⤵
PID:5056

Network

MITRE ATT&CK Enterprise v16

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

msdcsc.exe

Path C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Size 757KB
SHA256 a88cfb093e1297165940818f7bb6e8441fb34462c021c525cba8683b8630e566
MD5 d9ab48ca40d5ff52c62352c014ab623a
SHA1 731c734b87cb5d26d9006cf8265da09d7688b360
SHA512 20e5979ec50705ae4e4730832c62070a3d8fe1c786a1cb10bd67866c0271b247c67fde30b700f4aed5b650f1e86ae585b310fc5876e8728be202ea3fb4a1bf91
SSDEEP 12288:z9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hVO4VZ:9Z1xuVVjfFoynPaVBUR8f+kN10EBTZ
TLSH
T130F47D31B1808837D96239F89C5B92E5582A7E202E29754B3AF63F4C5E39183FD152DF
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3068-8-0x0000000000400000-0x00000000004CA000-memory.dmp

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memory/3388-0-0x00000000023F0000-0x00000000023F1000-memory.dmp

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memory/3388-1-0x000000000049D000-0x000000000049F000-memory.dmp

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memory/3388-11-0x00000000023F0000-0x00000000023F1000-memory.dmp

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memory/3388-16-0x0000000000400000-0x00000000004CA000-memory.dmp

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memory/4064-7-0x0000000000400000-0x00000000004CA000-memory.dmp

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memory/4064-6-0x0000000000400000-0x00000000004CA000-memory.dmp

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memory/4064-10-0x0000000000400000-0x00000000004CA000-memory.dmp

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memory/4784-14-0x0000000000400000-0x00000000004CA000-memory.dmp

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memory/4996-12-0x00000000009B0000-0x00000000009B1000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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