darkcomet | 6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90

General

Target

6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Size

283KB
MD5

ebf9b9aa46566390172fc9929cd2fc14
SHA1

0673fbd0e76b828cae642eee449a7cb3745ca250
SHA256

6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90
SHA512

5c5d6d7b1b4044a8fac3ce1a7b11b066743b4f681050f6965cbb0cb58b9fff183538b172a82f6c7daa1b7ac4f98059b564d4461f5a173544af17cab3fb182fa5

Score

10^/10

darkcomet guest16 evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

sms4kaka.hopto.org:5555

Mutex

DC_MUTEX-592DL0X

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
MuNYS9T6SHPe
install
true
offline_keylogger
true
persistence
false
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:

6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.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"	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.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

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

msdcsc.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	msdcsc.exe

Disables Task Manager via registry modification
evasion
Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

940 msdcsc.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

944 attrib.exe
1720 attrib.exe

pid	process
940	msdcsc.exe

pid	process
944	attrib.exe
1720	attrib.exe

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/1604-55-0x0000000000400000-0x00000000004C7000-memory.dmp	upx
\Users\Admin\Documents\MSDCSC\msdcsc.exe	upx
\Users\Admin\Documents\MSDCSC\msdcsc.exe	upx
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe	upx
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe	upx
behavioral1/memory/940-69-0x0000000000400000-0x00000000004C7000-memory.dmp	upx
behavioral1/memory/1604-70-0x0000000000400000-0x00000000004C7000-memory.dmp	upx
behavioral1/memory/940-71-0x0000000000400000-0x00000000004C7000-memory.dmp	upx

Loads dropped DLL 2 IoCs

Processes:

6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe

pid	process
1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.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

940 msdcsc.exe

pid	process
940	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

Processes:

6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeSecurityPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeTakeOwnershipPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeLoadDriverPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeSystemProfilePrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeSystemtimePrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeProfSingleProcessPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeIncBasePriorityPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeCreatePagefilePrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeBackupPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeRestorePrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeShutdownPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeDebugPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeSystemEnvironmentPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeChangeNotifyPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeRemoteShutdownPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeUndockPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeManageVolumePrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeImpersonatePrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeCreateGlobalPrivilege	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: 33	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: 34	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: 35	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
Token: SeIncreaseQuotaPrivilege	940	msdcsc.exe
Token: SeSecurityPrivilege	940	msdcsc.exe
Token: SeTakeOwnershipPrivilege	940	msdcsc.exe
Token: SeLoadDriverPrivilege	940	msdcsc.exe
Token: SeSystemProfilePrivilege	940	msdcsc.exe
Token: SeSystemtimePrivilege	940	msdcsc.exe
Token: SeProfSingleProcessPrivilege	940	msdcsc.exe
Token: SeIncBasePriorityPrivilege	940	msdcsc.exe
Token: SeCreatePagefilePrivilege	940	msdcsc.exe
Token: SeBackupPrivilege	940	msdcsc.exe
Token: SeRestorePrivilege	940	msdcsc.exe
Token: SeShutdownPrivilege	940	msdcsc.exe
Token: SeDebugPrivilege	940	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	940	msdcsc.exe
Token: SeChangeNotifyPrivilege	940	msdcsc.exe
Token: SeRemoteShutdownPrivilege	940	msdcsc.exe
Token: SeUndockPrivilege	940	msdcsc.exe
Token: SeManageVolumePrivilege	940	msdcsc.exe
Token: SeImpersonatePrivilege	940	msdcsc.exe
Token: SeCreateGlobalPrivilege	940	msdcsc.exe
Token: 33	940	msdcsc.exe
Token: 34	940	msdcsc.exe
Token: 35	940	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

940 msdcsc.exe

pid	process
940	msdcsc.exe

Suspicious use of WriteProcessMemory 43 IoCs

Processes:

6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 1604 wrote to memory of 2040	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	cmd.exe
PID 1604 wrote to memory of 2040	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	cmd.exe
PID 1604 wrote to memory of 2040	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	cmd.exe
PID 1604 wrote to memory of 2040	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	cmd.exe
PID 1604 wrote to memory of 824	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	cmd.exe
PID 1604 wrote to memory of 824	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	cmd.exe
PID 1604 wrote to memory of 824	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	cmd.exe
PID 1604 wrote to memory of 824	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	cmd.exe
PID 2040 wrote to memory of 1720	2040	cmd.exe	attrib.exe
PID 2040 wrote to memory of 1720	2040	cmd.exe	attrib.exe
PID 2040 wrote to memory of 1720	2040	cmd.exe	attrib.exe
PID 2040 wrote to memory of 1720	2040	cmd.exe	attrib.exe
PID 824 wrote to memory of 944	824	cmd.exe	attrib.exe
PID 824 wrote to memory of 944	824	cmd.exe	attrib.exe
PID 824 wrote to memory of 944	824	cmd.exe	attrib.exe
PID 824 wrote to memory of 944	824	cmd.exe	attrib.exe
PID 1604 wrote to memory of 940	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	msdcsc.exe
PID 1604 wrote to memory of 940	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	msdcsc.exe
PID 1604 wrote to memory of 940	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	msdcsc.exe
PID 1604 wrote to memory of 940	1604	6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe	msdcsc.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe
PID 940 wrote to memory of 1908	940	msdcsc.exe	notepad.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

1720 attrib.exe
944 attrib.exe

pid	process
1720	attrib.exe
944	attrib.exe

C:\Users\Admin\AppData\Local\Temp\6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe
"C:\Users\Admin\AppData\Local\Temp\6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1604

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:2040

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90.exe" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:1720

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:824

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:944

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
2⤵
- Modifies firewall policy service
- Disables RegEdit via registry modification
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:940

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:1908

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Modify Existing Service

1

T1031

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

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\Documents\MSDCSC\msdcsc.exe
Filesize
283KB

MD5
ebf9b9aa46566390172fc9929cd2fc14

SHA1
0673fbd0e76b828cae642eee449a7cb3745ca250

SHA256
6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90

SHA512
5c5d6d7b1b4044a8fac3ce1a7b11b066743b4f681050f6965cbb0cb58b9fff183538b172a82f6c7daa1b7ac4f98059b564d4461f5a173544af17cab3fb182fa5

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
283KB

MD5
ebf9b9aa46566390172fc9929cd2fc14

SHA1
0673fbd0e76b828cae642eee449a7cb3745ca250

SHA256
6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90

SHA512
5c5d6d7b1b4044a8fac3ce1a7b11b066743b4f681050f6965cbb0cb58b9fff183538b172a82f6c7daa1b7ac4f98059b564d4461f5a173544af17cab3fb182fa5

Download Submit
\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
283KB

MD5
ebf9b9aa46566390172fc9929cd2fc14

SHA1
0673fbd0e76b828cae642eee449a7cb3745ca250

SHA256
6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90

SHA512
5c5d6d7b1b4044a8fac3ce1a7b11b066743b4f681050f6965cbb0cb58b9fff183538b172a82f6c7daa1b7ac4f98059b564d4461f5a173544af17cab3fb182fa5

Download Submit
\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
283KB

MD5
ebf9b9aa46566390172fc9929cd2fc14

SHA1
0673fbd0e76b828cae642eee449a7cb3745ca250

SHA256
6aa1714aa9ab2d0cefb5f8ee9dfa78850fd3dbe32ac9d7b8db0ab0cfaf687a90

SHA512
5c5d6d7b1b4044a8fac3ce1a7b11b066743b4f681050f6965cbb0cb58b9fff183538b172a82f6c7daa1b7ac4f98059b564d4461f5a173544af17cab3fb182fa5

Download Submit
memory/824-57-0x0000000000000000-mapping.dmp

Download
memory/940-69-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/940-62-0x0000000000000000-mapping.dmp

Download
memory/940-71-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/944-59-0x0000000000000000-mapping.dmp

Download
memory/1604-54-0x0000000075A81000-0x0000000075A83000-memory.dmp

Filesize
8KB

Download
memory/1604-63-0x0000000003B40000-0x0000000003C07000-memory.dmp

Filesize
796KB

Download
memory/1604-55-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1604-70-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/1720-58-0x0000000000000000-mapping.dmp

Download
memory/1908-67-0x0000000000000000-mapping.dmp

Download
memory/2040-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads