darkcomet | 24c07c17891cf017be8d95fc1420e436770e0b707a1ce98cb67d128412e88af5

General

Target
67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe
Size 909KB
Sample240723-qxfctasfpp
SHA256 24c07c17891cf017be8d95fc1420e436770e0b707a1ce98cb67d128412e88af5
MD5 67cb1c01c75bff149ff7861c69fc4466
SHA1 24941f17cbfaf6be7983327256234341058d6dc5
SHA512 a1916f2ef82d64cfc34658a94652b0dc018962625edd9ead107544b50c2d146f4e9e1e32f10548e0ba2c00c328eb8eda317031f1d1d0edc7ba4f2e8b1f508902
SSDEEP 24576:fjEqdiCTMMfHNDAxHDGjcAyThDzp+c2Yjk/Pyh7VXr:fjEqk9M/twjkc3zpw87R
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet guest1 persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest1

C2

127.0.0.1:1604

Mutex

DCMIN_MUTEX-UV5JZRV

Attributes

InstallPath
DCSCMIN\IMDCSC.exe
gencode
DvTRSZJUcivg
install
true
offline_keylogger
true
persistence
false
reg_key
DarkComet RAT

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:\\Users\\Admin\\Documents\\DCSCMIN\\IMDCSC.exe"	vbc.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-1-5-21-3419463127-3903270268-2580331543-1000\Control Panel\International\Geo\Nation	vbc.exe

Executes dropped EXE 2 IoCs

pid	Process
2404	vbc.exe
1088	IMDCSC.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-1-5-21-3419463127-3903270268-2580331543-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WinUpdtr = "C:\\Users\\Admin\\AppData\\Roaming\\WinUpdtr\\67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe"	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\DarkComet RAT = "C:\\Users\\Admin\\Documents\\DCSCMIN\\IMDCSC.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 228 set thread context of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2404	vbc.exe
Token: SeSecurityPrivilege	2404	vbc.exe
Token: SeTakeOwnershipPrivilege	2404	vbc.exe
Token: SeLoadDriverPrivilege	2404	vbc.exe
Token: SeSystemProfilePrivilege	2404	vbc.exe
Token: SeSystemtimePrivilege	2404	vbc.exe
Token: SeProfSingleProcessPrivilege	2404	vbc.exe
Token: SeIncBasePriorityPrivilege	2404	vbc.exe
Token: SeCreatePagefilePrivilege	2404	vbc.exe
Token: SeBackupPrivilege	2404	vbc.exe
Token: SeRestorePrivilege	2404	vbc.exe
Token: SeShutdownPrivilege	2404	vbc.exe
Token: SeDebugPrivilege	2404	vbc.exe
Token: SeSystemEnvironmentPrivilege	2404	vbc.exe
Token: SeChangeNotifyPrivilege	2404	vbc.exe
Token: SeRemoteShutdownPrivilege	2404	vbc.exe
Token: SeUndockPrivilege	2404	vbc.exe
Token: SeManageVolumePrivilege	2404	vbc.exe
Token: SeImpersonatePrivilege	2404	vbc.exe
Token: SeCreateGlobalPrivilege	2404	vbc.exe
Token: 33	2404	vbc.exe
Token: 34	2404	vbc.exe
Token: 35	2404	vbc.exe
Token: 36	2404	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 228 wrote to memory of 2404	228	67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe	86
PID 2404 wrote to memory of 1088	2404	vbc.exe	87
PID 2404 wrote to memory of 1088	2404	vbc.exe	87
PID 2404 wrote to memory of 1088	2404	vbc.exe	87

C:\Users\Admin\AppData\Local\Temp\67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\67cb1c01c75bff149ff7861c69fc4466_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:228
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  C:\Users\Admin\AppData\Local\Temp\vbc.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2404
- - C:\Users\Admin\Documents\DCSCMIN\IMDCSC.exe
    "C:\Users\Admin\Documents\DCSCMIN\IMDCSC.exe"
    3⤵
    - Executes dropped EXE
    PID:1088

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

Scripting

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

vbc.exe

Path C:\Users\Admin\AppData\Local\Temp\vbc.exe
Size 1.1MB
SHA256 b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0
MD5 d881de17aa8f2e2c08cbb7b265f928f9
SHA1 08936aebc87decf0af6e8eada191062b5e65ac2a
SHA512 5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34
SSDEEP 24576:jp2silPBMIXGWClfuRcUGIJYK15Qs/QZM:jp2sMO7VzUTJH15QFZM
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/228-0-0x0000000074E62000-0x0000000074E63000-memory.dmp

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memory/228-1-0x0000000074E60000-0x0000000075411000-memory.dmp

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memory/228-2-0x0000000074E60000-0x0000000075411000-memory.dmp

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memory/228-28-0x0000000074E60000-0x0000000075411000-memory.dmp

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memory/2404-7-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/2404-11-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/2404-14-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/2404-12-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/2404-25-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/2404-26-0x00000000023C0000-0x00000000023C1000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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