darkcomet | ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c

General

Target

ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Size

668KB
MD5

6886a1bd5f1eb69d90d81f79638bf505
SHA1

fd957160ba84f51f5e29886008fc6eb6d48a3419
SHA256

ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c
SHA512

601b998b4236c63e6d06771a58f66436d744c972ff48671f3fad6626c7dfd4b988c0094583d7e2e4e38b8e0ff633d7f7773c002a76f5b9230e46ed53e21002a9
SSDEEP

12288:A9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hd:kZ1xuVVjfFoynPaVBUR8f+kN10EBf

Score

10^/10

darkcomet coolpol evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Coolpol

C2

instealman.hopto.org:1604

Mutex

DC_MUTEX-F6XBUWE

Attributes

InstallPath
Windupdt\winupdate.exe
gencode
5FHnjxyRWMdT
install
true
offline_keylogger
true
persistence
true
reg_key
winupdater

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:

ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\Windupdt\\winupdate.exe"	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

winupdate.exe

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

Executes dropped EXE 1 IoCs

Processes:

winupdate.exe

pid process

760 winupdate.exe
Loads dropped DLL 4 IoCs

Processes:

ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exewinupdate.exe

pid process

1120 ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
760 winupdate.exe
760 winupdate.exe
760 winupdate.exe

pid	process
760	winupdate.exe

pid	process
1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
760	winupdate.exe
760	winupdate.exe
760	winupdate.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

winupdate.exeac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windows\\system32\\Windupdt\\winupdate.exe"	winupdate.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windows\\system32\\Windupdt\\winupdate.exe"	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe

Drops file in System32 directory 3 IoCs

Processes:

ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Windupdt\	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
File created	C:\Windows\SysWOW64\Windupdt\winupdate.exe	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
File opened for modification	C:\Windows\SysWOW64\Windupdt\winupdate.exe	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 46 IoCs

Processes:

ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exewinupdate.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeSecurityPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeTakeOwnershipPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeLoadDriverPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeSystemProfilePrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeSystemtimePrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeProfSingleProcessPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeIncBasePriorityPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeCreatePagefilePrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeBackupPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeRestorePrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeShutdownPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeDebugPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeSystemEnvironmentPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeChangeNotifyPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeRemoteShutdownPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeUndockPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeManageVolumePrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeImpersonatePrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeCreateGlobalPrivilege	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: 33	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: 34	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: 35	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
Token: SeIncreaseQuotaPrivilege	760	winupdate.exe
Token: SeSecurityPrivilege	760	winupdate.exe
Token: SeTakeOwnershipPrivilege	760	winupdate.exe
Token: SeLoadDriverPrivilege	760	winupdate.exe
Token: SeSystemProfilePrivilege	760	winupdate.exe
Token: SeSystemtimePrivilege	760	winupdate.exe
Token: SeProfSingleProcessPrivilege	760	winupdate.exe
Token: SeIncBasePriorityPrivilege	760	winupdate.exe
Token: SeCreatePagefilePrivilege	760	winupdate.exe
Token: SeBackupPrivilege	760	winupdate.exe
Token: SeRestorePrivilege	760	winupdate.exe
Token: SeShutdownPrivilege	760	winupdate.exe
Token: SeDebugPrivilege	760	winupdate.exe
Token: SeSystemEnvironmentPrivilege	760	winupdate.exe
Token: SeChangeNotifyPrivilege	760	winupdate.exe
Token: SeRemoteShutdownPrivilege	760	winupdate.exe
Token: SeUndockPrivilege	760	winupdate.exe
Token: SeManageVolumePrivilege	760	winupdate.exe
Token: SeImpersonatePrivilege	760	winupdate.exe
Token: SeCreateGlobalPrivilege	760	winupdate.exe
Token: 33	760	winupdate.exe
Token: 34	760	winupdate.exe
Token: 35	760	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

winupdate.exe

pid process

760 winupdate.exe

pid	process
760	winupdate.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exewinupdate.exe

description	pid	process	target process
PID 1120 wrote to memory of 760	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe	winupdate.exe
PID 1120 wrote to memory of 760	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe	winupdate.exe
PID 1120 wrote to memory of 760	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe	winupdate.exe
PID 1120 wrote to memory of 760	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe	winupdate.exe
PID 1120 wrote to memory of 760	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe	winupdate.exe
PID 1120 wrote to memory of 760	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe	winupdate.exe
PID 1120 wrote to memory of 760	1120	ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe	winupdate.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe
PID 760 wrote to memory of 1908	760	winupdate.exe	notepad.exe

C:\Users\Admin\AppData\Local\Temp\ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe
"C:\Users\Admin\AppData\Local\Temp\ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1120

C:\Windows\SysWOW64\Windupdt\winupdate.exe
"C:\Windows\system32\Windupdt\winupdate.exe"
2⤵
- Modifies firewall policy service
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:760

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

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\Windupdt\winupdate.exe
Filesize
668KB

MD5
6886a1bd5f1eb69d90d81f79638bf505

SHA1
fd957160ba84f51f5e29886008fc6eb6d48a3419

SHA256
ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c

SHA512
601b998b4236c63e6d06771a58f66436d744c972ff48671f3fad6626c7dfd4b988c0094583d7e2e4e38b8e0ff633d7f7773c002a76f5b9230e46ed53e21002a9

Download Submit
C:\Windows\SysWOW64\Windupdt\winupdate.exe
Filesize
668KB

MD5
6886a1bd5f1eb69d90d81f79638bf505

SHA1
fd957160ba84f51f5e29886008fc6eb6d48a3419

SHA256
ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c

SHA512
601b998b4236c63e6d06771a58f66436d744c972ff48671f3fad6626c7dfd4b988c0094583d7e2e4e38b8e0ff633d7f7773c002a76f5b9230e46ed53e21002a9

Download Submit
\Windows\SysWOW64\Windupdt\winupdate.exe
Filesize
668KB

MD5
6886a1bd5f1eb69d90d81f79638bf505

SHA1
fd957160ba84f51f5e29886008fc6eb6d48a3419

SHA256
ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c

SHA512
601b998b4236c63e6d06771a58f66436d744c972ff48671f3fad6626c7dfd4b988c0094583d7e2e4e38b8e0ff633d7f7773c002a76f5b9230e46ed53e21002a9

Download Submit
\Windows\SysWOW64\Windupdt\winupdate.exe
Filesize
668KB

MD5
6886a1bd5f1eb69d90d81f79638bf505

SHA1
fd957160ba84f51f5e29886008fc6eb6d48a3419

SHA256
ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c

SHA512
601b998b4236c63e6d06771a58f66436d744c972ff48671f3fad6626c7dfd4b988c0094583d7e2e4e38b8e0ff633d7f7773c002a76f5b9230e46ed53e21002a9

Download Submit
\Windows\SysWOW64\Windupdt\winupdate.exe
Filesize
668KB

MD5
6886a1bd5f1eb69d90d81f79638bf505

SHA1
fd957160ba84f51f5e29886008fc6eb6d48a3419

SHA256
ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c

SHA512
601b998b4236c63e6d06771a58f66436d744c972ff48671f3fad6626c7dfd4b988c0094583d7e2e4e38b8e0ff633d7f7773c002a76f5b9230e46ed53e21002a9

Download Submit
\Windows\SysWOW64\Windupdt\winupdate.exe
Filesize
668KB

MD5
6886a1bd5f1eb69d90d81f79638bf505

SHA1
fd957160ba84f51f5e29886008fc6eb6d48a3419

SHA256
ac8f48948073402bf3304f9912d2f9785dd5ea346aeb90991f76741b3701570c

SHA512
601b998b4236c63e6d06771a58f66436d744c972ff48671f3fad6626c7dfd4b988c0094583d7e2e4e38b8e0ff633d7f7773c002a76f5b9230e46ed53e21002a9

Download Submit
memory/760-56-0x0000000000000000-mapping.dmp

Download
memory/1120-54-0x0000000075291000-0x0000000075293000-memory.dmp

Filesize
8KB

Download
memory/1908-63-0x0000000000000000-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