darkcomet | b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0

General

Target

b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0.exe
Size

834KB
MD5

642cc235b6552c524c89441d23053420
SHA1

64ea644a56e14d2062f76374176785a45515b9fd
SHA256

b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0
SHA512

1ade8c82a148496a47c46dc3567deb20a98d512ead13f5cf533d22ef0fbfbcaf2c9ad691c95717d956533875ec0f6aafc68764842f00129b1370cd3b25d49883
SSDEEP

24576:jG94QklbgNXrs5jkPENZI9k6Ts84PCx7/NBEn:jg4owbZI7cPc7Un

Score

10^/10

darkcomet guest2 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest2

C2

myvault.no-ip.info:999

Mutex

DC_MUTEX-ZCH6G3K

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
L8vg77ELMAXt
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:

5.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\\Microsoft\\Windows\\INetCookies\\MSDCSC\\msdcsc.exe"	5.EXE

Executes dropped EXE 1 IoCs

Processes:

5.EXE

pid process

1872 5.EXE
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

228 attrib.exe
224 attrib.exe

pid	process
1872	5.EXE

pid	process
228	attrib.exe
224	attrib.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0.exe5.EXE

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	5.EXE

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

5.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\\AppData\\Local\\Microsoft\\Windows\\INetCookies\\MSDCSC\\msdcsc.exe"	5.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:

5.EXE

description ioc process

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

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

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

5.EXE

description	pid	process
Token: SeIncreaseQuotaPrivilege	1872	5.EXE
Token: SeSecurityPrivilege	1872	5.EXE
Token: SeTakeOwnershipPrivilege	1872	5.EXE
Token: SeLoadDriverPrivilege	1872	5.EXE
Token: SeSystemProfilePrivilege	1872	5.EXE
Token: SeSystemtimePrivilege	1872	5.EXE
Token: SeProfSingleProcessPrivilege	1872	5.EXE
Token: SeIncBasePriorityPrivilege	1872	5.EXE
Token: SeCreatePagefilePrivilege	1872	5.EXE
Token: SeBackupPrivilege	1872	5.EXE
Token: SeRestorePrivilege	1872	5.EXE
Token: SeShutdownPrivilege	1872	5.EXE
Token: SeDebugPrivilege	1872	5.EXE
Token: SeSystemEnvironmentPrivilege	1872	5.EXE
Token: SeChangeNotifyPrivilege	1872	5.EXE
Token: SeRemoteShutdownPrivilege	1872	5.EXE
Token: SeUndockPrivilege	1872	5.EXE
Token: SeManageVolumePrivilege	1872	5.EXE
Token: SeImpersonatePrivilege	1872	5.EXE
Token: SeCreateGlobalPrivilege	1872	5.EXE
Token: 33	1872	5.EXE
Token: 34	1872	5.EXE
Token: 35	1872	5.EXE
Token: 36	1872	5.EXE

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0.exe5.EXEcmd.execmd.exe

description	pid	process	target process
PID 3076 wrote to memory of 1872	3076	b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0.exe	5.EXE
PID 3076 wrote to memory of 1872	3076	b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0.exe	5.EXE
PID 3076 wrote to memory of 1872	3076	b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0.exe	5.EXE
PID 1872 wrote to memory of 4944	1872	5.EXE	cmd.exe
PID 1872 wrote to memory of 4944	1872	5.EXE	cmd.exe
PID 1872 wrote to memory of 4944	1872	5.EXE	cmd.exe
PID 1872 wrote to memory of 2776	1872	5.EXE	cmd.exe
PID 1872 wrote to memory of 2776	1872	5.EXE	cmd.exe
PID 1872 wrote to memory of 2776	1872	5.EXE	cmd.exe
PID 2776 wrote to memory of 228	2776	cmd.exe	attrib.exe
PID 2776 wrote to memory of 228	2776	cmd.exe	attrib.exe
PID 2776 wrote to memory of 228	2776	cmd.exe	attrib.exe
PID 4944 wrote to memory of 224	4944	cmd.exe	attrib.exe
PID 4944 wrote to memory of 224	4944	cmd.exe	attrib.exe
PID 4944 wrote to memory of 224	4944	cmd.exe	attrib.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe
PID 1872 wrote to memory of 204	1872	5.EXE	notepad.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

228 attrib.exe
224 attrib.exe

pid	process
228	attrib.exe
224	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0.exe
"C:\Users\Admin\AppData\Local\Temp\b0dc3dbef3c1ecec8099f9531b9c0b4b913dbc244bfb0a6c399b40c66c81ccc0.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3076

C:\Users\Admin\AppData\Local\Temp\5.EXE
"C:\Users\Admin\AppData\Local\Temp\5.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:1872

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\5.EXE" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:4944

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\5.EXE" +s +h
4⤵
- Sets file to hidden
- Views/modifies file attributes
PID:224

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:2776

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
4⤵
- Sets file to hidden
- Views/modifies file attributes
PID:228

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:204

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Hidden Files and Directories

2

T1158

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\AppData\Local\Temp\5.EXE
Filesize
629KB

MD5
c4ce3a50c3a1cee27ff75153d047a547

SHA1
9d2117b1004e3dc45d421b8fd670168c77d8f834

SHA256
ef1f09a0fac40e5153c090639f161e122c77eab49ef74041fc0f04c66fbeba05

SHA512
0f923ad200f019bf9ddb966723cf2ff95df1243a879729139b6060a733d7ee1c40eef9f0627a2ab5e96b664d656ea56b9a276ac104162be7b41d5efef8e8a09c

Download Submit
C:\Users\Admin\AppData\Local\Temp\5.EXE
Filesize
629KB

MD5
c4ce3a50c3a1cee27ff75153d047a547

SHA1
9d2117b1004e3dc45d421b8fd670168c77d8f834

SHA256
ef1f09a0fac40e5153c090639f161e122c77eab49ef74041fc0f04c66fbeba05

SHA512
0f923ad200f019bf9ddb966723cf2ff95df1243a879729139b6060a733d7ee1c40eef9f0627a2ab5e96b664d656ea56b9a276ac104162be7b41d5efef8e8a09c

Download Submit
memory/204-140-0x0000000000000000-mapping.dmp

Download
memory/224-139-0x0000000000000000-mapping.dmp

Download
memory/228-138-0x0000000000000000-mapping.dmp

Download
memory/1872-132-0x0000000000000000-mapping.dmp

Download
memory/1872-135-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/1872-141-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/2776-137-0x0000000000000000-mapping.dmp

Download
memory/4944-136-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads