darkcomet | a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2

General

Target

a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe
Size

452KB
MD5

95338d4bf0749e280fb3dd156c173e65
SHA1

18e760995c269c6f052c476cda1e981df13828ec
SHA256

a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2
SHA512

a4cccd475eebba68bb2a36d819435bf83fabd7d6741dd51a794879dad88594e676a7d5542e7be0c04ee4476d1bb2743fd3238c1227b207e1dcd3dcf09c442533
SSDEEP

6144:fcV+uhsCuKQ+FD+TG1hPApaKYoCG9+ExwPIGFGZgH/Rgy/eQq3EK42Nlw3Zp/7US:fyTuKQyD+TKSBwA2ZgbQqAH4G2htZm

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:

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 2 IoCs

Processes:

vbc.exemsdcsc.exe

pid process

2680 vbc.exe
4804 msdcsc.exe

pid	process
2680	vbc.exe
4804	msdcsc.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2680-138-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral2/memory/2680-140-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral2/memory/2680-135-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral2/memory/2680-143-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral2/memory/2680-144-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral2/memory/2680-145-0x0000000000400000-0x00000000004F9000-memory.dmp	upx

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

Processes:

vbc.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation vbc.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	vbc.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

vbc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe

description	pid	process	target process
PID 1824 set thread context of 2680	1824	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe

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

System Information Discovery
T1082
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	2680	vbc.exe
Token: SeSecurityPrivilege	2680	vbc.exe
Token: SeTakeOwnershipPrivilege	2680	vbc.exe
Token: SeLoadDriverPrivilege	2680	vbc.exe
Token: SeSystemProfilePrivilege	2680	vbc.exe
Token: SeSystemtimePrivilege	2680	vbc.exe
Token: SeProfSingleProcessPrivilege	2680	vbc.exe
Token: SeIncBasePriorityPrivilege	2680	vbc.exe
Token: SeCreatePagefilePrivilege	2680	vbc.exe
Token: SeBackupPrivilege	2680	vbc.exe
Token: SeRestorePrivilege	2680	vbc.exe
Token: SeShutdownPrivilege	2680	vbc.exe
Token: SeDebugPrivilege	2680	vbc.exe
Token: SeSystemEnvironmentPrivilege	2680	vbc.exe
Token: SeChangeNotifyPrivilege	2680	vbc.exe
Token: SeRemoteShutdownPrivilege	2680	vbc.exe
Token: SeUndockPrivilege	2680	vbc.exe
Token: SeManageVolumePrivilege	2680	vbc.exe
Token: SeImpersonatePrivilege	2680	vbc.exe
Token: SeCreateGlobalPrivilege	2680	vbc.exe
Token: 33	2680	vbc.exe
Token: 34	2680	vbc.exe
Token: 35	2680	vbc.exe
Token: 36	2680	vbc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exevbc.exe

description	pid	process	target process
PID 1824 wrote to memory of 2680	1824	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1824 wrote to memory of 2680	1824	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1824 wrote to memory of 2680	1824	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1824 wrote to memory of 2680	1824	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1824 wrote to memory of 2680	1824	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1824 wrote to memory of 2680	1824	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1824 wrote to memory of 2680	1824	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1824 wrote to memory of 2680	1824	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 2680 wrote to memory of 4804	2680	vbc.exe	msdcsc.exe
PID 2680 wrote to memory of 4804	2680	vbc.exe	msdcsc.exe
PID 2680 wrote to memory of 4804	2680	vbc.exe	msdcsc.exe

C:\Users\Admin\AppData\Local\Temp\a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe
"C:\Users\Admin\AppData\Local\Temp\a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1824

C:\Users\Admin\AppData\Local\Temp\vbc.exe
C:\Users\Admin\AppData\Local\Temp\vbc.exe
2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2680

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:4804

Network

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\vbc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\AppData\Local\Temp\vbc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/1824-142-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/1824-139-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1824-132-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1824-133-0x0000000075410000-0x00000000759C1000-memory.dmp

Filesize
5.7MB

Download
memory/2680-140-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/2680-135-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/2680-143-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/2680-138-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/2680-144-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/2680-145-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/2680-134-0x0000000000000000-mapping.dmp

Download
memory/4804-146-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads