darkcomet | 4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5

General

Target

file.exe
Size

251KB
MD5

b7b88850bc66c349bc02f81a3b443f39
SHA1

4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0
SHA256

4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5
SHA512

47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282

Score

10^/10

darkcomet persistence rat trojan upx

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

T1004

Modify Registry

T1112

Processes:

file.exe

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\\MSDCSC\\msdcsc.exe"	file.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

1684 msdcsc.exe

pid	process
1684	msdcsc.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe	upx
\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe	upx
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe	upx
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe	upx

Loads dropped DLL 2 IoCs

Processes:

file.exe

pid process

2028 file.exe
2028 file.exe

pid	process
2028	file.exe
2028	file.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

file.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	file.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 46 IoCs

Processes:

file.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2028	file.exe
Token: SeSecurityPrivilege	2028	file.exe
Token: SeTakeOwnershipPrivilege	2028	file.exe
Token: SeLoadDriverPrivilege	2028	file.exe
Token: SeSystemProfilePrivilege	2028	file.exe
Token: SeSystemtimePrivilege	2028	file.exe
Token: SeProfSingleProcessPrivilege	2028	file.exe
Token: SeIncBasePriorityPrivilege	2028	file.exe
Token: SeCreatePagefilePrivilege	2028	file.exe
Token: SeBackupPrivilege	2028	file.exe
Token: SeRestorePrivilege	2028	file.exe
Token: SeShutdownPrivilege	2028	file.exe
Token: SeDebugPrivilege	2028	file.exe
Token: SeSystemEnvironmentPrivilege	2028	file.exe
Token: SeChangeNotifyPrivilege	2028	file.exe
Token: SeRemoteShutdownPrivilege	2028	file.exe
Token: SeUndockPrivilege	2028	file.exe
Token: SeManageVolumePrivilege	2028	file.exe
Token: SeImpersonatePrivilege	2028	file.exe
Token: SeCreateGlobalPrivilege	2028	file.exe
Token: 33	2028	file.exe
Token: 34	2028	file.exe
Token: 35	2028	file.exe
Token: SeIncreaseQuotaPrivilege	1684	msdcsc.exe
Token: SeSecurityPrivilege	1684	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1684	msdcsc.exe
Token: SeLoadDriverPrivilege	1684	msdcsc.exe
Token: SeSystemProfilePrivilege	1684	msdcsc.exe
Token: SeSystemtimePrivilege	1684	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1684	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1684	msdcsc.exe
Token: SeCreatePagefilePrivilege	1684	msdcsc.exe
Token: SeBackupPrivilege	1684	msdcsc.exe
Token: SeRestorePrivilege	1684	msdcsc.exe
Token: SeShutdownPrivilege	1684	msdcsc.exe
Token: SeDebugPrivilege	1684	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1684	msdcsc.exe
Token: SeChangeNotifyPrivilege	1684	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1684	msdcsc.exe
Token: SeUndockPrivilege	1684	msdcsc.exe
Token: SeManageVolumePrivilege	1684	msdcsc.exe
Token: SeImpersonatePrivilege	1684	msdcsc.exe
Token: SeCreateGlobalPrivilege	1684	msdcsc.exe
Token: 33	1684	msdcsc.exe
Token: 34	1684	msdcsc.exe
Token: 35	1684	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

1684 msdcsc.exe

pid	process
1684	msdcsc.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

file.exe

description	pid	process	target process
PID 2028 wrote to memory of 1684	2028	file.exe	msdcsc.exe
PID 2028 wrote to memory of 1684	2028	file.exe	msdcsc.exe
PID 2028 wrote to memory of 1684	2028	file.exe	msdcsc.exe
PID 2028 wrote to memory of 1684	2028	file.exe	msdcsc.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2028

C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1684

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
MD5
b7b88850bc66c349bc02f81a3b443f39

SHA1
4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0

SHA256
4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5

SHA512
47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282

Download Submit
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
MD5
b7b88850bc66c349bc02f81a3b443f39

SHA1
4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0

SHA256
4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5

SHA512
47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282

Download Submit
\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
MD5
b7b88850bc66c349bc02f81a3b443f39

SHA1
4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0

SHA256
4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5

SHA512
47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282

Download Submit
\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
MD5
b7b88850bc66c349bc02f81a3b443f39

SHA1
4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0

SHA256
4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5

SHA512
47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282

Download Submit
memory/1684-2-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads