darkcomet | 3d96847f7962c01a7951f95acb29dff7999b7e8d54c946b3b1ccd035cbf2bcb1

General

Target

SBHJYT.exe
Size

13.9MB
MD5

20799f295c5b0e5aa27b5896b230b57a
SHA1

e0e72f3a636f4dcd87bb5606f24fe0ff298fbb74
SHA256

3d96847f7962c01a7951f95acb29dff7999b7e8d54c946b3b1ccd035cbf2bcb1
SHA512

70cd3984c49da18dc9aeb852f745a8324a93583ab892af7f08bf5372cdb4ffc0cb0cce4033988d9088aaf1b0c740f612690addf9598ad3349ef6ef79112b3d16

Score

10^/10

darkcomet guest16 evasion persistence rat suricata trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

onlinebonjour1pt.ddns.net:1605

Mutex

DC_MUTEX-K9JEE5J

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
PPlJGVizdNKt
install
true
offline_keylogger
true
persistence
true
reg_key
Microdaptxx

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:

SBHJYT.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"	SBHJYT.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

msdcsc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	msdcsc.exe

Modifies security service 2 TTPs 1 IoCs
evasion

Modify Registry
T1112

Modify Existing Service
T1031

Processes:

msdcsc.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" msdcsc.exe
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
suricata: ET MALWARE Backdoor.Win32.DarkComet Screenshot Upload Successful
suricata: ET MALWARE Backdoor.Win32.DarkComet Screenshot Upload Successful
suricata
Disables RegEdit via registry modification
evasion
Disables Task Manager via registry modification
evasion
Executes dropped EXE 2 IoCs

Processes:

msdcsc.exemsdcsc.exe

pid process

3716 msdcsc.exe
3180 msdcsc.exe
Sets file to hidden 1 TTPs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158
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:

SBHJYT.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\International\Geo\Nation SBHJYT.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	msdcsc.exe

pid	process
3716	msdcsc.exe
3180	msdcsc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\International\Geo\Nation	SBHJYT.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

msdcsc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	msdcsc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

SBHJYT.exemsdcsc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microdaptxx = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	SBHJYT.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microdaptxx = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	msdcsc.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

SBHJYT.exemsdcsc.exe

description	pid	process	target process
PID 4060 set thread context of 2388	4060	SBHJYT.exe	SBHJYT.exe
PID 3716 set thread context of 3180	3716	msdcsc.exe	msdcsc.exe

autoit_exe 3 IoCs

AutoIT scripts compiled to PE executables.

Processes:

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

SBHJYT.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance SBHJYT.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msdcsc.exe

pid process

3180 msdcsc.exe

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

pid	process
3180	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

SBHJYT.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2388	SBHJYT.exe
Token: SeSecurityPrivilege	2388	SBHJYT.exe
Token: SeTakeOwnershipPrivilege	2388	SBHJYT.exe
Token: SeLoadDriverPrivilege	2388	SBHJYT.exe
Token: SeSystemProfilePrivilege	2388	SBHJYT.exe
Token: SeSystemtimePrivilege	2388	SBHJYT.exe
Token: SeProfSingleProcessPrivilege	2388	SBHJYT.exe
Token: SeIncBasePriorityPrivilege	2388	SBHJYT.exe
Token: SeCreatePagefilePrivilege	2388	SBHJYT.exe
Token: SeBackupPrivilege	2388	SBHJYT.exe
Token: SeRestorePrivilege	2388	SBHJYT.exe
Token: SeShutdownPrivilege	2388	SBHJYT.exe
Token: SeDebugPrivilege	2388	SBHJYT.exe
Token: SeSystemEnvironmentPrivilege	2388	SBHJYT.exe
Token: SeChangeNotifyPrivilege	2388	SBHJYT.exe
Token: SeRemoteShutdownPrivilege	2388	SBHJYT.exe
Token: SeUndockPrivilege	2388	SBHJYT.exe
Token: SeManageVolumePrivilege	2388	SBHJYT.exe
Token: SeImpersonatePrivilege	2388	SBHJYT.exe
Token: SeCreateGlobalPrivilege	2388	SBHJYT.exe
Token: 33	2388	SBHJYT.exe
Token: 34	2388	SBHJYT.exe
Token: 35	2388	SBHJYT.exe
Token: 36	2388	SBHJYT.exe
Token: SeIncreaseQuotaPrivilege	3180	msdcsc.exe
Token: SeSecurityPrivilege	3180	msdcsc.exe
Token: SeTakeOwnershipPrivilege	3180	msdcsc.exe
Token: SeLoadDriverPrivilege	3180	msdcsc.exe
Token: SeSystemProfilePrivilege	3180	msdcsc.exe
Token: SeSystemtimePrivilege	3180	msdcsc.exe
Token: SeProfSingleProcessPrivilege	3180	msdcsc.exe
Token: SeIncBasePriorityPrivilege	3180	msdcsc.exe
Token: SeCreatePagefilePrivilege	3180	msdcsc.exe
Token: SeBackupPrivilege	3180	msdcsc.exe
Token: SeRestorePrivilege	3180	msdcsc.exe
Token: SeShutdownPrivilege	3180	msdcsc.exe
Token: SeDebugPrivilege	3180	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	3180	msdcsc.exe
Token: SeChangeNotifyPrivilege	3180	msdcsc.exe
Token: SeRemoteShutdownPrivilege	3180	msdcsc.exe
Token: SeUndockPrivilege	3180	msdcsc.exe
Token: SeManageVolumePrivilege	3180	msdcsc.exe
Token: SeImpersonatePrivilege	3180	msdcsc.exe
Token: SeCreateGlobalPrivilege	3180	msdcsc.exe
Token: 33	3180	msdcsc.exe
Token: 34	3180	msdcsc.exe
Token: 35	3180	msdcsc.exe
Token: 36	3180	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

3180 msdcsc.exe

pid	process
3180	msdcsc.exe

Suspicious use of WriteProcessMemory 47 IoCs

Processes:

SBHJYT.exeSBHJYT.execmd.execmd.exemsdcsc.exemsdcsc.exe

description	pid	process	target process
PID 4060 wrote to memory of 2388	4060	SBHJYT.exe	SBHJYT.exe
PID 4060 wrote to memory of 2388	4060	SBHJYT.exe	SBHJYT.exe
PID 4060 wrote to memory of 2388	4060	SBHJYT.exe	SBHJYT.exe
PID 4060 wrote to memory of 2388	4060	SBHJYT.exe	SBHJYT.exe
PID 4060 wrote to memory of 2388	4060	SBHJYT.exe	SBHJYT.exe
PID 2388 wrote to memory of 2972	2388	SBHJYT.exe	cmd.exe
PID 2388 wrote to memory of 2972	2388	SBHJYT.exe	cmd.exe
PID 2388 wrote to memory of 2972	2388	SBHJYT.exe	cmd.exe
PID 2388 wrote to memory of 2296	2388	SBHJYT.exe	cmd.exe
PID 2388 wrote to memory of 2296	2388	SBHJYT.exe	cmd.exe
PID 2388 wrote to memory of 2296	2388	SBHJYT.exe	cmd.exe
PID 2296 wrote to memory of 3680	2296	cmd.exe	attrib.exe
PID 2296 wrote to memory of 3680	2296	cmd.exe	attrib.exe
PID 2296 wrote to memory of 3680	2296	cmd.exe	attrib.exe
PID 2972 wrote to memory of 3644	2972	cmd.exe	attrib.exe
PID 2972 wrote to memory of 3644	2972	cmd.exe	attrib.exe
PID 2972 wrote to memory of 3644	2972	cmd.exe	attrib.exe
PID 2388 wrote to memory of 3716	2388	SBHJYT.exe	msdcsc.exe
PID 2388 wrote to memory of 3716	2388	SBHJYT.exe	msdcsc.exe
PID 2388 wrote to memory of 3716	2388	SBHJYT.exe	msdcsc.exe
PID 3716 wrote to memory of 3180	3716	msdcsc.exe	msdcsc.exe
PID 3716 wrote to memory of 3180	3716	msdcsc.exe	msdcsc.exe
PID 3716 wrote to memory of 3180	3716	msdcsc.exe	msdcsc.exe
PID 3716 wrote to memory of 3180	3716	msdcsc.exe	msdcsc.exe
PID 3716 wrote to memory of 3180	3716	msdcsc.exe	msdcsc.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe
PID 3180 wrote to memory of 3676	3180	msdcsc.exe	notepad.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

3644 attrib.exe
3680 attrib.exe

pid	process
3644	attrib.exe
3680	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SBHJYT.exe
"C:\Users\Admin\AppData\Local\Temp\SBHJYT.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4060

C:\Users\Admin\AppData\Local\Temp\SBHJYT.exe
"C:\Users\Admin\AppData\Local\Temp\SBHJYT.exe"
2⤵
- 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:2388

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\SBHJYT.exe" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:2972

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\SBHJYT.exe" +s +h
4⤵
- Views/modifies file attributes
PID:3644

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:2296

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
4⤵
- Views/modifies file attributes
PID:3680

C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3716

C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
4⤵
- Modifies firewall policy service
- Modifies security service
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3180

C:\Windows\SysWOW64\notepad.exe
notepad
5⤵
PID:3676

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Modify Existing Service

2

T1031

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

6

T1112

Disabling Security Tools

2

T1089

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
MD5
20799f295c5b0e5aa27b5896b230b57a

SHA1
e0e72f3a636f4dcd87bb5606f24fe0ff298fbb74

SHA256
3d96847f7962c01a7951f95acb29dff7999b7e8d54c946b3b1ccd035cbf2bcb1

SHA512
70cd3984c49da18dc9aeb852f745a8324a93583ab892af7f08bf5372cdb4ffc0cb0cce4033988d9088aaf1b0c740f612690addf9598ad3349ef6ef79112b3d16

Download Submit
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
MD5
20799f295c5b0e5aa27b5896b230b57a

SHA1
e0e72f3a636f4dcd87bb5606f24fe0ff298fbb74

SHA256
3d96847f7962c01a7951f95acb29dff7999b7e8d54c946b3b1ccd035cbf2bcb1

SHA512
70cd3984c49da18dc9aeb852f745a8324a93583ab892af7f08bf5372cdb4ffc0cb0cce4033988d9088aaf1b0c740f612690addf9598ad3349ef6ef79112b3d16

Download Submit
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
MD5
20799f295c5b0e5aa27b5896b230b57a

SHA1
e0e72f3a636f4dcd87bb5606f24fe0ff298fbb74

SHA256
3d96847f7962c01a7951f95acb29dff7999b7e8d54c946b3b1ccd035cbf2bcb1

SHA512
70cd3984c49da18dc9aeb852f745a8324a93583ab892af7f08bf5372cdb4ffc0cb0cce4033988d9088aaf1b0c740f612690addf9598ad3349ef6ef79112b3d16

Download Submit
memory/2296-119-0x0000000000000000-mapping.dmp

Download
memory/2388-115-0x000000000015F888-mapping.dmp

Download
memory/2388-117-0x0000000002B60000-0x0000000002B61000-memory.dmp

Filesize
4KB

Download
memory/2388-116-0x00000000000D0000-0x0000000000186000-memory.dmp

Filesize
728KB

Download
memory/2388-114-0x00000000000D0000-0x0000000000186000-memory.dmp

Filesize
728KB

Download
memory/2972-118-0x0000000000000000-mapping.dmp

Download
memory/3180-126-0x000000000015F888-mapping.dmp

Download
memory/3180-129-0x00000000000D0000-0x0000000000186000-memory.dmp

Filesize
728KB

Download
memory/3180-130-0x0000000000A00000-0x0000000000B4A000-memory.dmp

Filesize
1.3MB

Download
memory/3644-121-0x0000000000000000-mapping.dmp

Download
memory/3676-128-0x0000000000000000-mapping.dmp

Download
memory/3676-131-0x0000000003100000-0x0000000003101000-memory.dmp

Filesize
4KB

Download
memory/3680-120-0x0000000000000000-mapping.dmp

Download
memory/3716-122-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads