darkcomet | 6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e

General

Target

6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe
Size

1.5MB
MD5

3588c7e12a3dcf3fdd74ca1828873a05
SHA1

1cae954471e543fdf22e2f332635a92e652c7992
SHA256

6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e
SHA512

6c1b3e3621a3018a87e61259895fe2fe34feef6e6c8836cb32caac7a8d6ceaf4a001dbf014ec226f9ea8c3d5b92f2f97fb78e7189fbf9fc5a0d28fbc716999b4

Score

10^/10

darkcomet sazan persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Sazan

C2

192.168.0.10:1604

Mutex

DC_MUTEX-W4T2SBC

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
nlveCPNhWUHe
install
true
offline_keylogger
true
persistence
true
reg_key
MicroUpdate

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

T1004

Modify Registry

T1112

Processes:

vbc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

3804 msdcsc.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
3804	msdcsc.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

vbc.exe6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe
Key created	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microsoft@Service = "C:\\Users\\Admin\\AppData\\Local\\Temp\\6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe"	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe

description	pid	process	target process
PID 2460 set thread context of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe

Modifies registry class 1 IoCs

Processes:

vbc.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance vbc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance	vbc.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

vbc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	3876	vbc.exe
Token: SeSecurityPrivilege	3876	vbc.exe
Token: SeTakeOwnershipPrivilege	3876	vbc.exe
Token: SeLoadDriverPrivilege	3876	vbc.exe
Token: SeSystemProfilePrivilege	3876	vbc.exe
Token: SeSystemtimePrivilege	3876	vbc.exe
Token: SeProfSingleProcessPrivilege	3876	vbc.exe
Token: SeIncBasePriorityPrivilege	3876	vbc.exe
Token: SeCreatePagefilePrivilege	3876	vbc.exe
Token: SeBackupPrivilege	3876	vbc.exe
Token: SeRestorePrivilege	3876	vbc.exe
Token: SeShutdownPrivilege	3876	vbc.exe
Token: SeDebugPrivilege	3876	vbc.exe
Token: SeSystemEnvironmentPrivilege	3876	vbc.exe
Token: SeChangeNotifyPrivilege	3876	vbc.exe
Token: SeRemoteShutdownPrivilege	3876	vbc.exe
Token: SeUndockPrivilege	3876	vbc.exe
Token: SeManageVolumePrivilege	3876	vbc.exe
Token: SeImpersonatePrivilege	3876	vbc.exe
Token: SeCreateGlobalPrivilege	3876	vbc.exe
Token: 33	3876	vbc.exe
Token: 34	3876	vbc.exe
Token: 35	3876	vbc.exe
Token: 36	3876	vbc.exe

Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe

pid	process
2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe
2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe
2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe

Suspicious use of SendNotifyMessage 3 IoCs

Processes:

6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe

pid	process
2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe
2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe
2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exevbc.exe

description	pid	process	target process
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 2460 wrote to memory of 3876	2460	6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe	vbc.exe
PID 3876 wrote to memory of 3804	3876	vbc.exe	msdcsc.exe
PID 3876 wrote to memory of 3804	3876	vbc.exe	msdcsc.exe
PID 3876 wrote to memory of 3804	3876	vbc.exe	msdcsc.exe

C:\Users\Admin\AppData\Local\Temp\6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe
"C:\Users\Admin\AppData\Local\Temp\6a90e5d6b3a93cf1d6b87a99c6fc23a0c3b798478238a1dc20838c4a25b5cd2e.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2460

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
2⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3876

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:3804

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
MD5
1f7bccc57d21a4bfeddaafe514cfd74d

SHA1
4dab09179a12468cb1757cb7ca26e06d616b0a8d

SHA256
d4cb7377e8275ed47e499ab0d7ee47167829a5931ba41aa5790593595a7e1061

SHA512
9e639c777dc2d456f038c14efb7cbc871ceb1d7380a74d18fb722a28901357ccb1166c0d883562280e030f0252004ca13a1371ea480d0523c435cd0a6d9f43d8

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
MD5
1f7bccc57d21a4bfeddaafe514cfd74d

SHA1
4dab09179a12468cb1757cb7ca26e06d616b0a8d

SHA256
d4cb7377e8275ed47e499ab0d7ee47167829a5931ba41aa5790593595a7e1061

SHA512
9e639c777dc2d456f038c14efb7cbc871ceb1d7380a74d18fb722a28901357ccb1166c0d883562280e030f0252004ca13a1371ea480d0523c435cd0a6d9f43d8

Download Submit
memory/3804-3-0x0000000000000000-mapping.dmp

Download
memory/3876-0-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3876-1-0x000000000048F888-mapping.dmp

Download
memory/3876-2-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads