darkcomet | bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62b

Analysis

max time kernel
120s
max time network
117s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 23:06

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General

Target

bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Size

714KB
MD5

1de5f79308914006c77e53b78606b900
SHA1

3da4c157515acde4809d584dd0592853ae9dd5d1
SHA256

bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62b
SHA512

8d48391d3e4b4b19c3afd8eed675a425eecafd2e308f80585d95733229d7257aba49b3bcc487f452a44aed271f65a012597549f4e7921dc420a3458ddebf1ccd
SSDEEP

12288:GaAchpWsuVTv7ItY8XljyypHP7cOLBev03hlULsmWZ++09ZcKDVsgdU:XAEENIq8XwyVPQclDq/+WnpsSU

Score

10^/10

darkcomet discovery 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\\AppData\\Local\\Temp\\Windupdt\\winupdate.exe"	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe

Executes dropped EXE 1 IoCs

pid	Process
4976	winupdate.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Windupdt\\winupdate.exe"	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe

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 2 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	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe

Checks processor information in registry 2 TTPs 8 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	winupdate.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeSecurityPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeTakeOwnershipPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeLoadDriverPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeSystemProfilePrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeSystemtimePrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeProfSingleProcessPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeIncBasePriorityPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeCreatePagefilePrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeBackupPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeRestorePrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeShutdownPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeDebugPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeSystemEnvironmentPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeChangeNotifyPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeRemoteShutdownPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeUndockPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeManageVolumePrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeImpersonatePrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeCreateGlobalPrivilege	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: 33	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: 34	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: 35	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: 36	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeIncreaseQuotaPrivilege	4976	winupdate.exe
Token: SeSecurityPrivilege	4976	winupdate.exe
Token: SeTakeOwnershipPrivilege	4976	winupdate.exe
Token: SeLoadDriverPrivilege	4976	winupdate.exe
Token: SeSystemProfilePrivilege	4976	winupdate.exe
Token: SeSystemtimePrivilege	4976	winupdate.exe
Token: SeProfSingleProcessPrivilege	4976	winupdate.exe
Token: SeIncBasePriorityPrivilege	4976	winupdate.exe
Token: SeCreatePagefilePrivilege	4976	winupdate.exe
Token: SeBackupPrivilege	4976	winupdate.exe
Token: SeRestorePrivilege	4976	winupdate.exe
Token: SeShutdownPrivilege	4976	winupdate.exe
Token: SeDebugPrivilege	4976	winupdate.exe
Token: SeSystemEnvironmentPrivilege	4976	winupdate.exe
Token: SeChangeNotifyPrivilege	4976	winupdate.exe
Token: SeRemoteShutdownPrivilege	4976	winupdate.exe
Token: SeUndockPrivilege	4976	winupdate.exe
Token: SeManageVolumePrivilege	4976	winupdate.exe
Token: SeImpersonatePrivilege	4976	winupdate.exe
Token: SeCreateGlobalPrivilege	4976	winupdate.exe
Token: 33	4976	winupdate.exe
Token: 34	4976	winupdate.exe
Token: 35	4976	winupdate.exe
Token: 36	4976	winupdate.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1352 wrote to memory of 4976	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe	83
PID 1352 wrote to memory of 4976	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe	83
PID 1352 wrote to memory of 4976	1352	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe	83

C:\Users\Admin\AppData\Local\Temp\bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
"C:\Users\Admin\AppData\Local\Temp\bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1352
- C:\Users\Admin\AppData\Local\Temp\Windupdt\winupdate.exe
  "C:\Users\Admin\AppData\Local\Temp\Windupdt\winupdate.exe"
  2⤵
  - Checks BIOS information in registry
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:4976

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

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\AppData\Local\Temp\Windupdt\winupdate.exe

Filesize
714KB

MD5
1de5f79308914006c77e53b78606b900

SHA1
3da4c157515acde4809d584dd0592853ae9dd5d1

SHA256
bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62b

SHA512
8d48391d3e4b4b19c3afd8eed675a425eecafd2e308f80585d95733229d7257aba49b3bcc487f452a44aed271f65a012597549f4e7921dc420a3458ddebf1ccd

Download Submit
memory/1352-0-0x0000000002310000-0x0000000002311000-memory.dmp

Filesize
4KB

Download
memory/1352-9-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-16-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-13-0x00000000021C0000-0x00000000021C1000-memory.dmp

Filesize
4KB

Download
memory/4976-12-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-14-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-15-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-11-0x00000000021C0000-0x00000000021C1000-memory.dmp

Filesize
4KB

Download
memory/4976-17-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-18-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-19-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-20-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-21-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-22-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/4976-23-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads