darkcomet | e2836933aa101819ccfd534a7f7565f68e7254925a6060372f4b83f5bf02ed09

Analysis

max time kernel
162s
max time network
176s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/03/2024, 02:50

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General

Target
bd7a6bf0253107186d2858468410e492.exe
Size 1.2MB
Sample240310-dbs1kabb21
SHA256 e2836933aa101819ccfd534a7f7565f68e7254925a6060372f4b83f5bf02ed09
MD5 bd7a6bf0253107186d2858468410e492
SHA1 d99cd5047d7dbd3a8286d3d5dce5d55cfc961d1e
SHA512 56b31cf452c4e03d08d7b9eebd97a4123d6b1b0887bd420de0da27fe07d9476d4305b91c8accef6c4c6e2c85b1f69a22e31b6dd2ca2182481fc24891608bc9cf
SSDEEP 24576:eSg5ZDiPWS1k3U2IIji1Nh6i5iyFsuU0o8:JShR3Hji/
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet 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

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:\\Windupdt\\winupdate.exe"	vbc.exe

Checks BIOS information in registry 2 TTPs 1 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	vbc.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Login Module = "C:\\ProgramData\\winloggon.exe"	bd7a6bf0253107186d2858468410e492.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	vbc.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1220 set thread context of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 4872 set thread context of 3000	4872	vbc.exe	111

Checks processor information in registry 2 TTPs 4 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	vbc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	vbc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	vbc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	vbc.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4872	vbc.exe
Token: SeSecurityPrivilege	4872	vbc.exe
Token: SeTakeOwnershipPrivilege	4872	vbc.exe
Token: SeLoadDriverPrivilege	4872	vbc.exe
Token: SeSystemProfilePrivilege	4872	vbc.exe
Token: SeSystemtimePrivilege	4872	vbc.exe
Token: SeProfSingleProcessPrivilege	4872	vbc.exe
Token: SeIncBasePriorityPrivilege	4872	vbc.exe
Token: SeCreatePagefilePrivilege	4872	vbc.exe
Token: SeBackupPrivilege	4872	vbc.exe
Token: SeRestorePrivilege	4872	vbc.exe
Token: SeShutdownPrivilege	4872	vbc.exe
Token: SeDebugPrivilege	4872	vbc.exe
Token: SeSystemEnvironmentPrivilege	4872	vbc.exe
Token: SeChangeNotifyPrivilege	4872	vbc.exe
Token: SeRemoteShutdownPrivilege	4872	vbc.exe
Token: SeUndockPrivilege	4872	vbc.exe
Token: SeManageVolumePrivilege	4872	vbc.exe
Token: SeImpersonatePrivilege	4872	vbc.exe
Token: SeCreateGlobalPrivilege	4872	vbc.exe
Token: 33	4872	vbc.exe
Token: 34	4872	vbc.exe
Token: 35	4872	vbc.exe
Token: 36	4872	vbc.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 1220 wrote to memory of 4872	1220	bd7a6bf0253107186d2858468410e492.exe	107
PID 4872 wrote to memory of 3000	4872	vbc.exe	111
PID 4872 wrote to memory of 3000	4872	vbc.exe	111
PID 4872 wrote to memory of 3000	4872	vbc.exe	111
PID 4872 wrote to memory of 3000	4872	vbc.exe	111
PID 4872 wrote to memory of 3000	4872	vbc.exe	111

C:\Users\Admin\AppData\Local\Temp\bd7a6bf0253107186d2858468410e492.exe
"C:\Users\Admin\AppData\Local\Temp\bd7a6bf0253107186d2858468410e492.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1220
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4872
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    PID:3000

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3828 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
1⤵
PID:2496

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

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

Scripting

T1064

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1220-13-0x0000000075500000-0x0000000075AB1000-memory.dmp

Download

memory/1220-1-0x0000000075500000-0x0000000075AB1000-memory.dmp

Download

memory/1220-2-0x00000000012F0000-0x0000000001300000-memory.dmp

Download

memory/1220-3-0x0000000075500000-0x0000000075AB1000-memory.dmp

Download

memory/1220-4-0x0000000075500000-0x0000000075AB1000-memory.dmp

Download

memory/1220-5-0x00000000012F0000-0x0000000001300000-memory.dmp

Download

memory/1220-0-0x0000000075500000-0x0000000075AB1000-memory.dmp

Download

memory/3000-23-0x0000000000400000-0x000000000051F000-memory.dmp

Download

memory/3000-21-0x0000000000400000-0x000000000051F000-memory.dmp

Download

memory/4872-8-0x0000000000400000-0x00000000004B8000-memory.dmp

Download

memory/4872-14-0x0000000000400000-0x00000000004B8000-memory.dmp

Download

memory/4872-15-0x0000000002300000-0x0000000002301000-memory.dmp

Download

memory/4872-16-0x0000000000400000-0x00000000004B8000-memory.dmp

Download

memory/4872-19-0x0000000000400000-0x00000000004B8000-memory.dmp

Download

memory/4872-7-0x0000000000400000-0x00000000004B8000-memory.dmp

Download

memory/4872-22-0x0000000000400000-0x00000000004B8000-memory.dmp

Download

memory/4872-6-0x0000000000400000-0x00000000004B8000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads