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 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
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
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	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
Disables RegEdit via registry modification
evasion
Disables Task Manager via registry modification
evasion
Executes dropped EXE 2 IoCs

Processes:

msdcsc.exemsdcsc.exe

pid process

1628 msdcsc.exe
1468 msdcsc.exe
Sets file to hidden 1 TTPs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158
Loads dropped DLL 2 IoCs

Processes:

SBHJYT.exemsdcsc.exe

pid process

748 SBHJYT.exe
1628 msdcsc.exe

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

pid	process
1628	msdcsc.exe
1468	msdcsc.exe

pid	process
748	SBHJYT.exe
1628	msdcsc.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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microdaptxx = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	SBHJYT.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\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 2004 set thread context of 748	2004	SBHJYT.exe	SBHJYT.exe
PID 1628 set thread context of 1468	1628	msdcsc.exe	msdcsc.exe

autoit_exe 5 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
\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
\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
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msdcsc.exe

pid process

1468 msdcsc.exe

pid	process
1468	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

Processes:

SBHJYT.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	748	SBHJYT.exe
Token: SeSecurityPrivilege	748	SBHJYT.exe
Token: SeTakeOwnershipPrivilege	748	SBHJYT.exe
Token: SeLoadDriverPrivilege	748	SBHJYT.exe
Token: SeSystemProfilePrivilege	748	SBHJYT.exe
Token: SeSystemtimePrivilege	748	SBHJYT.exe
Token: SeProfSingleProcessPrivilege	748	SBHJYT.exe
Token: SeIncBasePriorityPrivilege	748	SBHJYT.exe
Token: SeCreatePagefilePrivilege	748	SBHJYT.exe
Token: SeBackupPrivilege	748	SBHJYT.exe
Token: SeRestorePrivilege	748	SBHJYT.exe
Token: SeShutdownPrivilege	748	SBHJYT.exe
Token: SeDebugPrivilege	748	SBHJYT.exe
Token: SeSystemEnvironmentPrivilege	748	SBHJYT.exe
Token: SeChangeNotifyPrivilege	748	SBHJYT.exe
Token: SeRemoteShutdownPrivilege	748	SBHJYT.exe
Token: SeUndockPrivilege	748	SBHJYT.exe
Token: SeManageVolumePrivilege	748	SBHJYT.exe
Token: SeImpersonatePrivilege	748	SBHJYT.exe
Token: SeCreateGlobalPrivilege	748	SBHJYT.exe
Token: 33	748	SBHJYT.exe
Token: 34	748	SBHJYT.exe
Token: 35	748	SBHJYT.exe
Token: SeIncreaseQuotaPrivilege	1468	msdcsc.exe
Token: SeSecurityPrivilege	1468	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1468	msdcsc.exe
Token: SeLoadDriverPrivilege	1468	msdcsc.exe
Token: SeSystemProfilePrivilege	1468	msdcsc.exe
Token: SeSystemtimePrivilege	1468	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1468	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1468	msdcsc.exe
Token: SeCreatePagefilePrivilege	1468	msdcsc.exe
Token: SeBackupPrivilege	1468	msdcsc.exe
Token: SeRestorePrivilege	1468	msdcsc.exe
Token: SeShutdownPrivilege	1468	msdcsc.exe
Token: SeDebugPrivilege	1468	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1468	msdcsc.exe
Token: SeChangeNotifyPrivilege	1468	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1468	msdcsc.exe
Token: SeUndockPrivilege	1468	msdcsc.exe
Token: SeManageVolumePrivilege	1468	msdcsc.exe
Token: SeImpersonatePrivilege	1468	msdcsc.exe
Token: SeCreateGlobalPrivilege	1468	msdcsc.exe
Token: 33	1468	msdcsc.exe
Token: 34	1468	msdcsc.exe
Token: 35	1468	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

1468 msdcsc.exe

pid	process
1468	msdcsc.exe

Suspicious use of WriteProcessMemory 55 IoCs

Processes:

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

description	pid	process	target process
PID 2004 wrote to memory of 748	2004	SBHJYT.exe	SBHJYT.exe
PID 2004 wrote to memory of 748	2004	SBHJYT.exe	SBHJYT.exe
PID 2004 wrote to memory of 748	2004	SBHJYT.exe	SBHJYT.exe
PID 2004 wrote to memory of 748	2004	SBHJYT.exe	SBHJYT.exe
PID 2004 wrote to memory of 748	2004	SBHJYT.exe	SBHJYT.exe
PID 2004 wrote to memory of 748	2004	SBHJYT.exe	SBHJYT.exe
PID 748 wrote to memory of 1900	748	SBHJYT.exe	cmd.exe
PID 748 wrote to memory of 1900	748	SBHJYT.exe	cmd.exe
PID 748 wrote to memory of 1900	748	SBHJYT.exe	cmd.exe
PID 748 wrote to memory of 1900	748	SBHJYT.exe	cmd.exe
PID 748 wrote to memory of 1932	748	SBHJYT.exe	cmd.exe
PID 748 wrote to memory of 1932	748	SBHJYT.exe	cmd.exe
PID 748 wrote to memory of 1932	748	SBHJYT.exe	cmd.exe
PID 748 wrote to memory of 1932	748	SBHJYT.exe	cmd.exe
PID 1900 wrote to memory of 808	1900	cmd.exe	attrib.exe
PID 1900 wrote to memory of 808	1900	cmd.exe	attrib.exe
PID 1900 wrote to memory of 808	1900	cmd.exe	attrib.exe
PID 1900 wrote to memory of 808	1900	cmd.exe	attrib.exe
PID 1932 wrote to memory of 384	1932	cmd.exe	attrib.exe
PID 1932 wrote to memory of 384	1932	cmd.exe	attrib.exe
PID 1932 wrote to memory of 384	1932	cmd.exe	attrib.exe
PID 1932 wrote to memory of 384	1932	cmd.exe	attrib.exe
PID 748 wrote to memory of 1628	748	SBHJYT.exe	msdcsc.exe
PID 748 wrote to memory of 1628	748	SBHJYT.exe	msdcsc.exe
PID 748 wrote to memory of 1628	748	SBHJYT.exe	msdcsc.exe
PID 748 wrote to memory of 1628	748	SBHJYT.exe	msdcsc.exe
PID 1628 wrote to memory of 1468	1628	msdcsc.exe	msdcsc.exe
PID 1628 wrote to memory of 1468	1628	msdcsc.exe	msdcsc.exe
PID 1628 wrote to memory of 1468	1628	msdcsc.exe	msdcsc.exe
PID 1628 wrote to memory of 1468	1628	msdcsc.exe	msdcsc.exe
PID 1628 wrote to memory of 1468	1628	msdcsc.exe	msdcsc.exe
PID 1628 wrote to memory of 1468	1628	msdcsc.exe	msdcsc.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe
PID 1468 wrote to memory of 1672	1468	msdcsc.exe	notepad.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

808 attrib.exe
384 attrib.exe

pid	process
808	attrib.exe
384	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:2004

C:\Users\Admin\AppData\Local\Temp\SBHJYT.exe
"C:\Users\Admin\AppData\Local\Temp\SBHJYT.exe"
2⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:748

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:1900

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\SBHJYT.exe" +s +h
4⤵
- Views/modifies file attributes
PID:808

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:1932

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
4⤵
- Views/modifies file attributes
PID:384

C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1628

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:1468

C:\Windows\SysWOW64\notepad.exe
notepad
5⤵
PID:1672

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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

SHA1
e0e72f3a636f4dcd87bb5606f24fe0ff298fbb74

SHA256
3d96847f7962c01a7951f95acb29dff7999b7e8d54c946b3b1ccd035cbf2bcb1

SHA512
70cd3984c49da18dc9aeb852f745a8324a93583ab892af7f08bf5372cdb4ffc0cb0cce4033988d9088aaf1b0c740f612690addf9598ad3349ef6ef79112b3d16

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

SHA1
e0e72f3a636f4dcd87bb5606f24fe0ff298fbb74

SHA256
3d96847f7962c01a7951f95acb29dff7999b7e8d54c946b3b1ccd035cbf2bcb1

SHA512
70cd3984c49da18dc9aeb852f745a8324a93583ab892af7f08bf5372cdb4ffc0cb0cce4033988d9088aaf1b0c740f612690addf9598ad3349ef6ef79112b3d16

Download Submit
memory/384-69-0x0000000000000000-mapping.dmp

Download
memory/748-64-0x00000000000C0000-0x0000000000176000-memory.dmp

Filesize
728KB

Download
memory/748-65-0x00000000002A0000-0x00000000002A1000-memory.dmp

Filesize
4KB

Download
memory/748-62-0x000000000014F888-mapping.dmp

Download
memory/748-61-0x00000000000C0000-0x0000000000176000-memory.dmp

Filesize
728KB

Download
memory/808-68-0x0000000000000000-mapping.dmp

Download
memory/1468-83-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/1468-82-0x00000000000C0000-0x0000000000176000-memory.dmp

Filesize
728KB

Download
memory/1468-77-0x000000000014F888-mapping.dmp

Download
memory/1628-71-0x0000000000000000-mapping.dmp

Download
memory/1672-80-0x0000000000000000-mapping.dmp

Download
memory/1672-84-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/1900-66-0x0000000000000000-mapping.dmp

Download
memory/1932-67-0x0000000000000000-mapping.dmp

Download
memory/2004-60-0x00000000765F1000-0x00000000765F3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads