darkcomet | 3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0

Analysis

max time kernel
151s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
29/10/2022, 08:33

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General

Target

3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Size

904KB
MD5

4795b8ece18861e875923d3f3b797f6b
SHA1

03a40021d1c9f72ca38519cf6cb3001b49a8fef8
SHA256

3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0
SHA512

d9369c8cf723158dd2aec959192f27a970e3f377db90fbc11441dd9f4caee251388ea71bb80be1e5c01ac82078dbdd11191916fb342e768b463ba8786ce8f1c7
SSDEEP

12288:d0mO7YrTeojkWYsZwQftO9ZxQQV2BbxkHO8ONFmByxYPAGEE23JB0EBHxn8uEJBV:dLtrTtzVZnfkZsRcAE2zdHxRmiE6Eh

Score

10^/10

darkcomet bootkit persistence rat trojan

Malware Config

Signatures

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

T1004

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"	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe

Executes dropped EXE 3 IoCs

pid	Process
4988	winupdate.exe
3744	winupdate.exe
1304	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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
File opened for modification	\??\PhysicalDrive0	winupdate.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4844 set thread context of 4860	4844	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	87
PID 4860 set thread context of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4988 set thread context of 3744	4988	winupdate.exe	93
PID 3744 set thread context of 1304	3744	winupdate.exe	94

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeSecurityPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeTakeOwnershipPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeLoadDriverPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeSystemProfilePrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeSystemtimePrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeProfSingleProcessPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeIncBasePriorityPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeCreatePagefilePrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeBackupPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeRestorePrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeShutdownPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeDebugPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeSystemEnvironmentPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeChangeNotifyPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeRemoteShutdownPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeUndockPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeManageVolumePrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeImpersonatePrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeCreateGlobalPrivilege	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: 33	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: 34	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: 35	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: 36	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
Token: SeIncreaseQuotaPrivilege	1304	winupdate.exe
Token: SeSecurityPrivilege	1304	winupdate.exe
Token: SeTakeOwnershipPrivilege	1304	winupdate.exe
Token: SeLoadDriverPrivilege	1304	winupdate.exe
Token: SeSystemProfilePrivilege	1304	winupdate.exe
Token: SeSystemtimePrivilege	1304	winupdate.exe
Token: SeProfSingleProcessPrivilege	1304	winupdate.exe
Token: SeIncBasePriorityPrivilege	1304	winupdate.exe
Token: SeCreatePagefilePrivilege	1304	winupdate.exe
Token: SeBackupPrivilege	1304	winupdate.exe
Token: SeRestorePrivilege	1304	winupdate.exe
Token: SeShutdownPrivilege	1304	winupdate.exe
Token: SeDebugPrivilege	1304	winupdate.exe
Token: SeSystemEnvironmentPrivilege	1304	winupdate.exe
Token: SeChangeNotifyPrivilege	1304	winupdate.exe
Token: SeRemoteShutdownPrivilege	1304	winupdate.exe
Token: SeUndockPrivilege	1304	winupdate.exe
Token: SeManageVolumePrivilege	1304	winupdate.exe
Token: SeImpersonatePrivilege	1304	winupdate.exe
Token: SeCreateGlobalPrivilege	1304	winupdate.exe
Token: 33	1304	winupdate.exe
Token: 34	1304	winupdate.exe
Token: 35	1304	winupdate.exe
Token: 36	1304	winupdate.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
4844	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
4988	winupdate.exe
3744	winupdate.exe
1304	winupdate.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 4844 wrote to memory of 4860	4844	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	87
PID 4844 wrote to memory of 4860	4844	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	87
PID 4844 wrote to memory of 4860	4844	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	87
PID 4844 wrote to memory of 4860	4844	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	87
PID 4844 wrote to memory of 4860	4844	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	87
PID 4844 wrote to memory of 4860	4844	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	87
PID 4844 wrote to memory of 4860	4844	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	87
PID 4844 wrote to memory of 4860	4844	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	87
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4860 wrote to memory of 4632	4860	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	88
PID 4632 wrote to memory of 4988	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	90
PID 4632 wrote to memory of 4988	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	90
PID 4632 wrote to memory of 4988	4632	3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe	90
PID 4988 wrote to memory of 3744	4988	winupdate.exe	93
PID 4988 wrote to memory of 3744	4988	winupdate.exe	93
PID 4988 wrote to memory of 3744	4988	winupdate.exe	93
PID 4988 wrote to memory of 3744	4988	winupdate.exe	93
PID 4988 wrote to memory of 3744	4988	winupdate.exe	93
PID 4988 wrote to memory of 3744	4988	winupdate.exe	93
PID 4988 wrote to memory of 3744	4988	winupdate.exe	93
PID 4988 wrote to memory of 3744	4988	winupdate.exe	93
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 3744 wrote to memory of 1304	3744	winupdate.exe	94
PID 1304 wrote to memory of 5032	1304	winupdate.exe	95
PID 1304 wrote to memory of 5032	1304	winupdate.exe	95
PID 1304 wrote to memory of 5032	1304	winupdate.exe	95
PID 1304 wrote to memory of 4712	1304	winupdate.exe	96
PID 1304 wrote to memory of 4712	1304	winupdate.exe	96

C:\Users\Admin\AppData\Local\Temp\3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
"C:\Users\Admin\AppData\Local\Temp\3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4844
- C:\Users\Admin\AppData\Local\Temp\3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
  "C:\Users\Admin\AppData\Local\Temp\3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4860
- - C:\Users\Admin\AppData\Local\Temp\3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe
    "C:\Users\Admin\AppData\Local\Temp\3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0.exe"
    3⤵
    - Modifies WinLogon for persistence
    - Checks computer location settings
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4632
  - - C:\Windupdt\winupdate.exe
      "C:\Windupdt\winupdate.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4988
    - - C:\Windupdt\winupdate.exe
        
        "C:\Windupdt\winupdate.exe"
        5⤵
        Executes dropped EXE
        Writes to the Master Boot Record (MBR)
        Suspicious use of SetThreadContext
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:3744
      - C:\Windupdt\winupdate.exe
        
        "C:\Windupdt\winupdate.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:1304
        
        C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        7⤵
        
        PID:5032
        
        C:\Windows\explorer.exe
        
        "C:\Windows\explorer.exe"
        7⤵
        
        PID:4712

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windupdt\winupdate.exe

Filesize
904KB

MD5
4795b8ece18861e875923d3f3b797f6b

SHA1
03a40021d1c9f72ca38519cf6cb3001b49a8fef8

SHA256
3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0

SHA512
d9369c8cf723158dd2aec959192f27a970e3f377db90fbc11441dd9f4caee251388ea71bb80be1e5c01ac82078dbdd11191916fb342e768b463ba8786ce8f1c7

Download Submit
C:\Windupdt\winupdate.exe

Filesize
904KB

MD5
4795b8ece18861e875923d3f3b797f6b

SHA1
03a40021d1c9f72ca38519cf6cb3001b49a8fef8

SHA256
3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0

SHA512
d9369c8cf723158dd2aec959192f27a970e3f377db90fbc11441dd9f4caee251388ea71bb80be1e5c01ac82078dbdd11191916fb342e768b463ba8786ce8f1c7

Download Submit
C:\Windupdt\winupdate.exe

Filesize
904KB

MD5
4795b8ece18861e875923d3f3b797f6b

SHA1
03a40021d1c9f72ca38519cf6cb3001b49a8fef8

SHA256
3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0

SHA512
d9369c8cf723158dd2aec959192f27a970e3f377db90fbc11441dd9f4caee251388ea71bb80be1e5c01ac82078dbdd11191916fb342e768b463ba8786ce8f1c7

Download Submit
C:\Windupdt\winupdate.exe

Filesize
904KB

MD5
4795b8ece18861e875923d3f3b797f6b

SHA1
03a40021d1c9f72ca38519cf6cb3001b49a8fef8

SHA256
3333946afecebf58c7d4a0c4a6d55cdf40bf20a209cd31a7abe803042cc7eca0

SHA512
d9369c8cf723158dd2aec959192f27a970e3f377db90fbc11441dd9f4caee251388ea71bb80be1e5c01ac82078dbdd11191916fb342e768b463ba8786ce8f1c7

Download Submit
memory/1304-165-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download
memory/1304-164-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download
memory/1304-162-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download
memory/3744-161-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/4632-149-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download
memory/4632-141-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download
memory/4632-144-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download
memory/4632-142-0x0000000000400000-0x00000000004B4000-memory.dmp

Filesize
720KB

Download
memory/4860-139-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/4860-135-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/4860-143-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads