darkcomet | bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62b

Analysis

max time kernel
119s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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

Executes dropped EXE 1 IoCs

pid	Process
2836	winupdate.exe

Loads dropped DLL 4 IoCs

pid	Process
2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
2836	winupdate.exe
2836	winupdate.exe
2836	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-1-5-21-3063565911-2056067323-3330884624-1000\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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
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

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

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeSecurityPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeTakeOwnershipPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeLoadDriverPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeSystemProfilePrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeSystemtimePrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeProfSingleProcessPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeIncBasePriorityPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeCreatePagefilePrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeBackupPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeRestorePrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeShutdownPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeDebugPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeSystemEnvironmentPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeChangeNotifyPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeRemoteShutdownPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeUndockPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeManageVolumePrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeImpersonatePrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeCreateGlobalPrivilege	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: 33	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: 34	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: 35	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe
Token: SeIncreaseQuotaPrivilege	2836	winupdate.exe
Token: SeSecurityPrivilege	2836	winupdate.exe
Token: SeTakeOwnershipPrivilege	2836	winupdate.exe
Token: SeLoadDriverPrivilege	2836	winupdate.exe
Token: SeSystemProfilePrivilege	2836	winupdate.exe
Token: SeSystemtimePrivilege	2836	winupdate.exe
Token: SeProfSingleProcessPrivilege	2836	winupdate.exe
Token: SeIncBasePriorityPrivilege	2836	winupdate.exe
Token: SeCreatePagefilePrivilege	2836	winupdate.exe
Token: SeBackupPrivilege	2836	winupdate.exe
Token: SeRestorePrivilege	2836	winupdate.exe
Token: SeShutdownPrivilege	2836	winupdate.exe
Token: SeDebugPrivilege	2836	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2836	winupdate.exe
Token: SeChangeNotifyPrivilege	2836	winupdate.exe
Token: SeRemoteShutdownPrivilege	2836	winupdate.exe
Token: SeUndockPrivilege	2836	winupdate.exe
Token: SeManageVolumePrivilege	2836	winupdate.exe
Token: SeImpersonatePrivilege	2836	winupdate.exe
Token: SeCreateGlobalPrivilege	2836	winupdate.exe
Token: 33	2836	winupdate.exe
Token: 34	2836	winupdate.exe
Token: 35	2836	winupdate.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2892 wrote to memory of 2836	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe	30
PID 2892 wrote to memory of 2836	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe	30
PID 2892 wrote to memory of 2836	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe	30
PID 2892 wrote to memory of 2836	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe	30
PID 2892 wrote to memory of 2836	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe	30
PID 2892 wrote to memory of 2836	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe	30
PID 2892 wrote to memory of 2836	2892	bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62bN.exe	30

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
- Loads dropped DLL
- 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:2892
- 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
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:2836

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

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

Filesize
714KB

MD5
1de5f79308914006c77e53b78606b900

SHA1
3da4c157515acde4809d584dd0592853ae9dd5d1

SHA256
bfb47d2cf87d65d99ee91c56927219281d8866ca818f2613186fd2f671dcb62b

SHA512
8d48391d3e4b4b19c3afd8eed675a425eecafd2e308f80585d95733229d7257aba49b3bcc487f452a44aed271f65a012597549f4e7921dc420a3458ddebf1ccd

Download Submit
memory/2836-16-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2836-13-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2836-14-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2836-15-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2836-17-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2836-18-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2836-19-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2836-20-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2836-21-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2836-22-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2836-23-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2892-8-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2892-0-0x0000000000660000-0x0000000000661000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads