darkcomet | cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237

General

Target

cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Size

756KB
MD5

7492e20402c6b8b0a59e276bda7319b8
SHA1

fbaa2a0b58d6728b0e1dc08d13f9a9132277016e
SHA256

cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237
SHA512

02dfff656da997e75ca0ab99f6f8b51d5cf4d9cd709ff5779a36a8d57a386382c270a06ba31d89f9a417c24ffbb7230238f005815889844c5a38edd7814faa9f
SSDEEP

12288:09HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hfU:4Z1xuVVjfFoynPaVBUR8f+kN10EBu

Score

10^/10

darkcomet kurban persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Kurban

C2

emincan.no-ip.org:1604

127.0.0.1:1604

Mutex

DC_MUTEX-YSZXZA3

Attributes

InstallPath
Windupdt\winupdate.exe
gencode
EXR6B1nK6pfE
install
true
offline_keylogger
true
persistence
false
reg_key
Winupdater

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

Processes:

cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\Windupdt\\winupdate.exe"	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

Executes dropped EXE 1 IoCs

Processes:

winupdate.exe

pid process

2288 winupdate.exe

pid	process
2288	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

Processes:

cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winupdater = "C:\\Windows\\Windupdt\\winupdate.exe"	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

Drops file in Windows directory 3 IoCs

Processes:

cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

description	ioc	process
File opened for modification	C:\Windows\Windupdt\	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
File created	C:\Windows\Windupdt\winupdate.exe	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
File opened for modification	C:\Windows\Windupdt\winupdate.exe	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exewinupdate.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeSecurityPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeTakeOwnershipPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeLoadDriverPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeSystemProfilePrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeSystemtimePrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeProfSingleProcessPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeIncBasePriorityPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeCreatePagefilePrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeBackupPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeRestorePrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeShutdownPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeDebugPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeSystemEnvironmentPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeChangeNotifyPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeRemoteShutdownPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeUndockPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeManageVolumePrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeImpersonatePrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeCreateGlobalPrivilege	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: 33	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: 34	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: 35	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: 36	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
Token: SeIncreaseQuotaPrivilege	2288	winupdate.exe
Token: SeSecurityPrivilege	2288	winupdate.exe
Token: SeTakeOwnershipPrivilege	2288	winupdate.exe
Token: SeLoadDriverPrivilege	2288	winupdate.exe
Token: SeSystemProfilePrivilege	2288	winupdate.exe
Token: SeSystemtimePrivilege	2288	winupdate.exe
Token: SeProfSingleProcessPrivilege	2288	winupdate.exe
Token: SeIncBasePriorityPrivilege	2288	winupdate.exe
Token: SeCreatePagefilePrivilege	2288	winupdate.exe
Token: SeBackupPrivilege	2288	winupdate.exe
Token: SeRestorePrivilege	2288	winupdate.exe
Token: SeShutdownPrivilege	2288	winupdate.exe
Token: SeDebugPrivilege	2288	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2288	winupdate.exe
Token: SeChangeNotifyPrivilege	2288	winupdate.exe
Token: SeRemoteShutdownPrivilege	2288	winupdate.exe
Token: SeUndockPrivilege	2288	winupdate.exe
Token: SeManageVolumePrivilege	2288	winupdate.exe
Token: SeImpersonatePrivilege	2288	winupdate.exe
Token: SeCreateGlobalPrivilege	2288	winupdate.exe
Token: 33	2288	winupdate.exe
Token: 34	2288	winupdate.exe
Token: 35	2288	winupdate.exe
Token: 36	2288	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

winupdate.exe

pid process

2288 winupdate.exe

pid	process
2288	winupdate.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe

description	pid	process	target process
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 3528	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	notepad.exe
PID 2444 wrote to memory of 2288	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	winupdate.exe
PID 2444 wrote to memory of 2288	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	winupdate.exe
PID 2444 wrote to memory of 2288	2444	cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe	winupdate.exe

C:\Users\Admin\AppData\Local\Temp\cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe
"C:\Users\Admin\AppData\Local\Temp\cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2444

C:\Windows\SysWOW64\notepad.exe
notepad
2⤵
PID:3528

C:\Windows\Windupdt\winupdate.exe
"C:\Windows\Windupdt\winupdate.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2288

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Windows\Windupdt\winupdate.exe
Filesize
756KB

MD5
7492e20402c6b8b0a59e276bda7319b8

SHA1
fbaa2a0b58d6728b0e1dc08d13f9a9132277016e

SHA256
cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237

SHA512
02dfff656da997e75ca0ab99f6f8b51d5cf4d9cd709ff5779a36a8d57a386382c270a06ba31d89f9a417c24ffbb7230238f005815889844c5a38edd7814faa9f

Download Submit
C:\Windows\Windupdt\winupdate.exe
Filesize
756KB

MD5
7492e20402c6b8b0a59e276bda7319b8

SHA1
fbaa2a0b58d6728b0e1dc08d13f9a9132277016e

SHA256
cc3f7855682a8b1c89973a2ba57c21af884f5f9487149e1bee8b258161bc7237

SHA512
02dfff656da997e75ca0ab99f6f8b51d5cf4d9cd709ff5779a36a8d57a386382c270a06ba31d89f9a417c24ffbb7230238f005815889844c5a38edd7814faa9f

Download Submit
memory/2288-133-0x0000000000000000-mapping.dmp

Download
memory/3528-132-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads