darkcomet | 3d445366066d1c084f489995e476abe8e1204fa1918468868c4f90cabd2e5817

General

Target

lab_02_win10x64/6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

Score

10^/10

darkcomet guest16 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

test213.no-ip.info:1604

Mutex

DC_MUTEX-KHNEW06

Attributes

InstallPath
MSDCSC\runddl32.exe
gencode
F6FE8i2BxCpu
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:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.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\\runddl32.exe"	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

Executes dropped EXE 1 IoCs

Processes:

runddl32.exe

pid process

3060 runddl32.exe
Sets file to hidden 1 TTPs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

pid	process
3060	runddl32.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:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Control Panel\International\Geo\Nation	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exerunddl32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\runddl32.exe"	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\runddl32.exe"	runddl32.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:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

runddl32.exe

pid process

3060 runddl32.exe

pid	process
3060	runddl32.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exerunddl32.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSecurityPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeTakeOwnershipPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeLoadDriverPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemProfilePrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemtimePrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeProfSingleProcessPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeIncBasePriorityPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeCreatePagefilePrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeBackupPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeRestorePrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeShutdownPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeDebugPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeSystemEnvironmentPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeChangeNotifyPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeRemoteShutdownPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeUndockPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeManageVolumePrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeImpersonatePrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeCreateGlobalPrivilege	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 33	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 34	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 35	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: 36	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
Token: SeIncreaseQuotaPrivilege	3060	runddl32.exe
Token: SeSecurityPrivilege	3060	runddl32.exe
Token: SeTakeOwnershipPrivilege	3060	runddl32.exe
Token: SeLoadDriverPrivilege	3060	runddl32.exe
Token: SeSystemProfilePrivilege	3060	runddl32.exe
Token: SeSystemtimePrivilege	3060	runddl32.exe
Token: SeProfSingleProcessPrivilege	3060	runddl32.exe
Token: SeIncBasePriorityPrivilege	3060	runddl32.exe
Token: SeCreatePagefilePrivilege	3060	runddl32.exe
Token: SeBackupPrivilege	3060	runddl32.exe
Token: SeRestorePrivilege	3060	runddl32.exe
Token: SeShutdownPrivilege	3060	runddl32.exe
Token: SeDebugPrivilege	3060	runddl32.exe
Token: SeSystemEnvironmentPrivilege	3060	runddl32.exe
Token: SeChangeNotifyPrivilege	3060	runddl32.exe
Token: SeRemoteShutdownPrivilege	3060	runddl32.exe
Token: SeUndockPrivilege	3060	runddl32.exe
Token: SeManageVolumePrivilege	3060	runddl32.exe
Token: SeImpersonatePrivilege	3060	runddl32.exe
Token: SeCreateGlobalPrivilege	3060	runddl32.exe
Token: 33	3060	runddl32.exe
Token: 34	3060	runddl32.exe
Token: 35	3060	runddl32.exe
Token: 36	3060	runddl32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

runddl32.exe

pid process

3060 runddl32.exe

pid	process
3060	runddl32.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.execmd.execmd.exerunddl32.exe

description	pid	process	target process
PID 3212 wrote to memory of 2656	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 3212 wrote to memory of 2656	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 3212 wrote to memory of 2656	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 3212 wrote to memory of 2736	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 3212 wrote to memory of 2736	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 3212 wrote to memory of 2736	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	cmd.exe
PID 2656 wrote to memory of 4048	2656	cmd.exe	attrib.exe
PID 2656 wrote to memory of 4048	2656	cmd.exe	attrib.exe
PID 2656 wrote to memory of 4048	2656	cmd.exe	attrib.exe
PID 2736 wrote to memory of 3936	2736	cmd.exe	attrib.exe
PID 2736 wrote to memory of 3936	2736	cmd.exe	attrib.exe
PID 2736 wrote to memory of 3936	2736	cmd.exe	attrib.exe
PID 3212 wrote to memory of 3060	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	runddl32.exe
PID 3212 wrote to memory of 3060	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	runddl32.exe
PID 3212 wrote to memory of 3060	3212	6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe	runddl32.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe
PID 3060 wrote to memory of 3064	3060	runddl32.exe	notepad.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

4048 attrib.exe
3936 attrib.exe

pid	process
4048	attrib.exe
3936	attrib.exe

C:\Users\Admin\AppData\Local\Temp\lab_02_win10x64\6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe
"C:\Users\Admin\AppData\Local\Temp\lab_02_win10x64\6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3212

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\lab_02_win10x64\6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:2656

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\lab_02_win10x64\6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363.exe" +s +h
3⤵
- Views/modifies file attributes
PID:4048

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\lab_02_win10x64" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:2736

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\lab_02_win10x64" +s +h
3⤵
- Views/modifies file attributes
PID:3936

C:\Users\Admin\AppData\Local\Temp\MSDCSC\runddl32.exe
"C:\Users\Admin\AppData\Local\Temp\MSDCSC\runddl32.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3060

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:3064

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\MSDCSC\runddl32.exe
MD5
f6351da84168d40fae8da0c156fbab0f

SHA1
1a2283c85bc5c655f5f2f77f27ec3a9412e8db7e

SHA256
6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363

SHA512
9948e83f004bb6d0edf14626660365e469dec444128e820f82066e73177f5de109d048fe226a9cbe95cfc6a99a9d4c501ab3f3900aa2e3677434f03d52694607

Download Submit
C:\Users\Admin\AppData\Local\Temp\MSDCSC\runddl32.exe
MD5
f6351da84168d40fae8da0c156fbab0f

SHA1
1a2283c85bc5c655f5f2f77f27ec3a9412e8db7e

SHA256
6d34ded00c0da9887ba752872093f59c649de72a1f629a32014f5ed8be509363

SHA512
9948e83f004bb6d0edf14626660365e469dec444128e820f82066e73177f5de109d048fe226a9cbe95cfc6a99a9d4c501ab3f3900aa2e3677434f03d52694607

Download Submit
memory/2656-114-0x0000000000000000-mapping.dmp

Download
memory/2736-115-0x0000000000000000-mapping.dmp

Download
memory/3060-119-0x0000000000000000-mapping.dmp

Download
memory/3060-123-0x0000000002300000-0x0000000002301000-memory.dmp

Filesize
4KB

Download
memory/3064-122-0x0000000000000000-mapping.dmp

Download
memory/3064-124-0x0000000002B70000-0x0000000002B71000-memory.dmp

Filesize
4KB

Download
memory/3212-118-0x0000000002220000-0x0000000002221000-memory.dmp

Filesize
4KB

Download
memory/3936-117-0x0000000000000000-mapping.dmp

Download
memory/4048-116-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads