darkcomet | 102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf

Analysis

max time kernel
120s
max time network
17s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-12-2024 18:35

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General

Target

102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Size

714KB
MD5

15a8803fba095e563aab42c8b0b16c92
SHA1

106790e1f9cbb58a32e05b0be8e94ba068fd1231
SHA256

102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf
SHA512

dc7f0456068a5ee49f70e1a83c52b60073403d216f56c27041f6001d260ec2e13c2570d772d279b38c20fe8db5e5712484f30a2e64b8ae41657079ebd9d53159
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"	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.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	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Executes dropped EXE 1 IoCs

pid	Process
2740	winupdate.exe

Loads dropped DLL 4 IoCs

pid	Process
2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
2740	winupdate.exe
2740	winupdate.exe
2740	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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Windupdt\\winupdate.exe"	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.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	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.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\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	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.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

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	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeSecurityPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeTakeOwnershipPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeLoadDriverPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeSystemProfilePrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeSystemtimePrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeProfSingleProcessPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeIncBasePriorityPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeCreatePagefilePrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeBackupPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeRestorePrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeShutdownPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeDebugPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeSystemEnvironmentPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeChangeNotifyPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeRemoteShutdownPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeUndockPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeManageVolumePrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeImpersonatePrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeCreateGlobalPrivilege	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: 33	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: 34	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: 35	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
Token: SeIncreaseQuotaPrivilege	2740	winupdate.exe
Token: SeSecurityPrivilege	2740	winupdate.exe
Token: SeTakeOwnershipPrivilege	2740	winupdate.exe
Token: SeLoadDriverPrivilege	2740	winupdate.exe
Token: SeSystemProfilePrivilege	2740	winupdate.exe
Token: SeSystemtimePrivilege	2740	winupdate.exe
Token: SeProfSingleProcessPrivilege	2740	winupdate.exe
Token: SeIncBasePriorityPrivilege	2740	winupdate.exe
Token: SeCreatePagefilePrivilege	2740	winupdate.exe
Token: SeBackupPrivilege	2740	winupdate.exe
Token: SeRestorePrivilege	2740	winupdate.exe
Token: SeShutdownPrivilege	2740	winupdate.exe
Token: SeDebugPrivilege	2740	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2740	winupdate.exe
Token: SeChangeNotifyPrivilege	2740	winupdate.exe
Token: SeRemoteShutdownPrivilege	2740	winupdate.exe
Token: SeUndockPrivilege	2740	winupdate.exe
Token: SeManageVolumePrivilege	2740	winupdate.exe
Token: SeImpersonatePrivilege	2740	winupdate.exe
Token: SeCreateGlobalPrivilege	2740	winupdate.exe
Token: 33	2740	winupdate.exe
Token: 34	2740	winupdate.exe
Token: 35	2740	winupdate.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 2740	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe	30
PID 2688 wrote to memory of 2740	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe	30
PID 2688 wrote to memory of 2740	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe	30
PID 2688 wrote to memory of 2740	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe	30
PID 2688 wrote to memory of 2740	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe	30
PID 2688 wrote to memory of 2740	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe	30
PID 2688 wrote to memory of 2740	2688	102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe	30

C:\Users\Admin\AppData\Local\Temp\102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.exe
"C:\Users\Admin\AppData\Local\Temp\102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf.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:2688
- 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:2740

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
15a8803fba095e563aab42c8b0b16c92

SHA1
106790e1f9cbb58a32e05b0be8e94ba068fd1231

SHA256
102e1d4abab91d71ef3c2daa82b63091f640cb4dd28603770198df5d971394cf

SHA512
dc7f0456068a5ee49f70e1a83c52b60073403d216f56c27041f6001d260ec2e13c2570d772d279b38c20fe8db5e5712484f30a2e64b8ae41657079ebd9d53159

Download Submit
memory/2688-0-0x0000000000280000-0x0000000000281000-memory.dmp

Filesize
4KB

Download
memory/2688-8-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-16-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-14-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-15-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-13-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-17-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-18-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-19-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-20-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-21-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-22-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download
memory/2740-23-0x0000000000400000-0x00000000004C0000-memory.dmp

Filesize
768KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads