darkcomet | 28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5

General

Target

28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe
Size

900KB
MD5

dc9d7b6a5110abb328bf595d056ce40d
SHA1

efab84b08c63cfe9fb703462a24a9961daa05b08
SHA256

28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5
SHA512

053179b603c513c7be82a355c9b7f0b7bf5edf4ccf083f533d8bf7a9da19dfe558c7ff08d3f7d61c4db28a2f2d72a1af5ce40cb580662ce1440bf97e35f7a16f
SSDEEP

12288:k0l9Cga3LAdaU+zV44yzQ9Jf/opEpZI5yRXyoQZDhQruxXV/9rPTzgbLgXy+Vo0K:j4iUCaLRpFX2WuxXVtPTEgC+60K

Score

10^/10

darkcomet summer persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

summer

C2

qsab98.no-ip.biz:1604

Mutex

DC_MUTEX-6G9L12L

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
6QgnJweVD4dH
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

3744 msdcsc.exe

pid	process
3744	msdcsc.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

Processes:

28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4060001867-1434967833-2212371794-1000\Control Panel\International\Geo\Nation	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

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-1-5-21-4060001867-1434967833-2212371794-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe

description	pid	process	target process
PID 1636 set thread context of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.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

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

vbc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1016	vbc.exe
Token: SeSecurityPrivilege	1016	vbc.exe
Token: SeTakeOwnershipPrivilege	1016	vbc.exe
Token: SeLoadDriverPrivilege	1016	vbc.exe
Token: SeSystemProfilePrivilege	1016	vbc.exe
Token: SeSystemtimePrivilege	1016	vbc.exe
Token: SeProfSingleProcessPrivilege	1016	vbc.exe
Token: SeIncBasePriorityPrivilege	1016	vbc.exe
Token: SeCreatePagefilePrivilege	1016	vbc.exe
Token: SeBackupPrivilege	1016	vbc.exe
Token: SeRestorePrivilege	1016	vbc.exe
Token: SeShutdownPrivilege	1016	vbc.exe
Token: SeDebugPrivilege	1016	vbc.exe
Token: SeSystemEnvironmentPrivilege	1016	vbc.exe
Token: SeChangeNotifyPrivilege	1016	vbc.exe
Token: SeRemoteShutdownPrivilege	1016	vbc.exe
Token: SeUndockPrivilege	1016	vbc.exe
Token: SeManageVolumePrivilege	1016	vbc.exe
Token: SeImpersonatePrivilege	1016	vbc.exe
Token: SeCreateGlobalPrivilege	1016	vbc.exe
Token: 33	1016	vbc.exe
Token: 34	1016	vbc.exe
Token: 35	1016	vbc.exe
Token: 36	1016	vbc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.execmd.exevbc.exe

description	pid	process	target process
PID 1636 wrote to memory of 4360	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	cmd.exe
PID 1636 wrote to memory of 4360	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	cmd.exe
PID 1636 wrote to memory of 4360	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	cmd.exe
PID 4360 wrote to memory of 808	4360	cmd.exe	choice.exe
PID 4360 wrote to memory of 808	4360	cmd.exe	choice.exe
PID 4360 wrote to memory of 808	4360	cmd.exe	choice.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1636 wrote to memory of 1016	1636	28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe	vbc.exe
PID 1016 wrote to memory of 3744	1016	vbc.exe	msdcsc.exe
PID 1016 wrote to memory of 3744	1016	vbc.exe	msdcsc.exe
PID 1016 wrote to memory of 3744	1016	vbc.exe	msdcsc.exe

C:\Users\Admin\AppData\Local\Temp\28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe
"C:\Users\Admin\AppData\Local\Temp\28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1636

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C choice /C Y /N /D Y /T 3 & Del C:\Users\Admin\AppData\Local\Temp\28711e96e760a3e740d1bfa3304d86504970fbf8b2184b675774ab3a2148a2f5.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:4360

C:\Windows\SysWOW64\choice.exe
choice /C Y /N /D Y /T 3
3⤵
PID:808

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
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1016

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:3744

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

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Downloads

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/808-136-0x0000000000000000-mapping.dmp

Download
memory/1016-139-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1016-137-0x0000000000000000-mapping.dmp

Download
memory/1016-138-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1016-140-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1016-145-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1636-133-0x0000000075120000-0x00000000756D1000-memory.dmp

Filesize
5.7MB

Download
memory/1636-141-0x0000000075120000-0x00000000756D1000-memory.dmp

Filesize
5.7MB

Download
memory/1636-134-0x0000000075120000-0x00000000756D1000-memory.dmp

Filesize
5.7MB

Download
memory/3744-142-0x0000000000000000-mapping.dmp

Download
memory/4360-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads