darkcomet | de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a

Analysis

max time kernel
114s
max time network
206s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
14/10/2022, 04:32

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General

Target
de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a.exe
Size 749KB
Sample221014-e51g6sgdck
SHA256 de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a
MD5 6ec0d920ad862c940991fff3d4c1e77f
SHA1 e78fb8c7c755a153284f212ec1132001e81acaaf
SHA512 1a404022e2720186de203334dab9e3dead20d52645399517f211e4b503d9306a80c627dad52eba19174df53bca4a2b1245ee05bff7a0299c39fbcabacb941fcc
SSDEEP 12288:X4dMRU/UP4heFjLDFtooSQ/UXZRY49SA7GI/p7a6o2Mhi9b+y6BxtwJdIkZjOK48:cwU/UwhWvsXZpSRSJo2xb+y7JdIkoI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet evasion persistence rat trojan upx

Malware Config

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

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\windupdt\\winupdate.exe"	Server.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
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
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	winupdate.exe

Executes dropped EXE 3 IoCs

pid	Process
4216	7za.exe
2316	Server.exe
4840	winupdate.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2220-132-0x0000000000400000-0x0000000000478000-memory.dmp	upx
behavioral2/files/0x0006000000022e26-138.dat	upx
behavioral2/files/0x0006000000022e26-140.dat	upx
behavioral2/memory/2316-141-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/files/0x0006000000022e28-143.dat	upx
behavioral2/files/0x0006000000022e28-144.dat	upx
behavioral2/memory/2316-146-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/4840-148-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/2220-149-0x0000000000400000-0x0000000000478000-memory.dmp	upx
behavioral2/memory/4840-150-0x0000000000400000-0x00000000004BA000-memory.dmp	upx

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	Server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Roaming\\windupdt\\winupdate.exe"	Server.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Roaming\\windupdt\\winupdate.exe"	winupdate.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

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

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4076	PING.EXE

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2316	Server.exe
Token: SeSecurityPrivilege	2316	Server.exe
Token: SeTakeOwnershipPrivilege	2316	Server.exe
Token: SeLoadDriverPrivilege	2316	Server.exe
Token: SeSystemProfilePrivilege	2316	Server.exe
Token: SeSystemtimePrivilege	2316	Server.exe
Token: SeProfSingleProcessPrivilege	2316	Server.exe
Token: SeIncBasePriorityPrivilege	2316	Server.exe
Token: SeCreatePagefilePrivilege	2316	Server.exe
Token: SeBackupPrivilege	2316	Server.exe
Token: SeRestorePrivilege	2316	Server.exe
Token: SeShutdownPrivilege	2316	Server.exe
Token: SeDebugPrivilege	2316	Server.exe
Token: SeSystemEnvironmentPrivilege	2316	Server.exe
Token: SeChangeNotifyPrivilege	2316	Server.exe
Token: SeRemoteShutdownPrivilege	2316	Server.exe
Token: SeUndockPrivilege	2316	Server.exe
Token: SeManageVolumePrivilege	2316	Server.exe
Token: SeImpersonatePrivilege	2316	Server.exe
Token: SeCreateGlobalPrivilege	2316	Server.exe
Token: 33	2316	Server.exe
Token: 34	2316	Server.exe
Token: 35	2316	Server.exe
Token: 36	2316	Server.exe
Token: SeIncreaseQuotaPrivilege	4840	winupdate.exe
Token: SeSecurityPrivilege	4840	winupdate.exe
Token: SeTakeOwnershipPrivilege	4840	winupdate.exe
Token: SeLoadDriverPrivilege	4840	winupdate.exe
Token: SeSystemProfilePrivilege	4840	winupdate.exe
Token: SeSystemtimePrivilege	4840	winupdate.exe
Token: SeProfSingleProcessPrivilege	4840	winupdate.exe
Token: SeIncBasePriorityPrivilege	4840	winupdate.exe
Token: SeCreatePagefilePrivilege	4840	winupdate.exe
Token: SeBackupPrivilege	4840	winupdate.exe
Token: SeRestorePrivilege	4840	winupdate.exe
Token: SeShutdownPrivilege	4840	winupdate.exe
Token: SeDebugPrivilege	4840	winupdate.exe
Token: SeSystemEnvironmentPrivilege	4840	winupdate.exe
Token: SeChangeNotifyPrivilege	4840	winupdate.exe
Token: SeRemoteShutdownPrivilege	4840	winupdate.exe
Token: SeUndockPrivilege	4840	winupdate.exe
Token: SeManageVolumePrivilege	4840	winupdate.exe
Token: SeImpersonatePrivilege	4840	winupdate.exe
Token: SeCreateGlobalPrivilege	4840	winupdate.exe
Token: 33	4840	winupdate.exe
Token: 34	4840	winupdate.exe
Token: 35	4840	winupdate.exe
Token: 36	4840	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4840	winupdate.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 4936	2220	de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a.exe	82
PID 2220 wrote to memory of 4936	2220	de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a.exe	82
PID 2220 wrote to memory of 4936	2220	de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a.exe	82
PID 4936 wrote to memory of 4216	4936	cmd.exe	84
PID 4936 wrote to memory of 4216	4936	cmd.exe	84
PID 4936 wrote to memory of 4216	4936	cmd.exe	84
PID 2220 wrote to memory of 2316	2220	de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a.exe	86
PID 2220 wrote to memory of 2316	2220	de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a.exe	86
PID 2220 wrote to memory of 2316	2220	de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a.exe	86
PID 2316 wrote to memory of 4840	2316	Server.exe	87
PID 2316 wrote to memory of 4840	2316	Server.exe	87
PID 2316 wrote to memory of 4840	2316	Server.exe	87
PID 2316 wrote to memory of 3148	2316	Server.exe	88
PID 2316 wrote to memory of 3148	2316	Server.exe	88
PID 2316 wrote to memory of 3148	2316	Server.exe	88
PID 3148 wrote to memory of 4076	3148	cmd.exe	90
PID 3148 wrote to memory of 4076	3148	cmd.exe	90
PID 3148 wrote to memory of 4076	3148	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a.exe
"C:\Users\Admin\AppData\Local\Temp\de179a93b75cc446beedf255e93d6fab354cfd2850ec1e71cd2d03e113306f3a.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\7za.exe" "x" "-y" "C:\Users\Admin\AppData\Roaming\Server.7z" "-pHVLnt5Dy""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4936
- - C:\Users\Admin\AppData\Roaming\7za.exe
    "C:\Users\Admin\AppData\Roaming\7za.exe" "x" "-y" "C:\Users\Admin\AppData\Roaming\Server.7z" "-pHVLnt5Dy"
    3⤵
    - Executes dropped EXE
    PID:4216
- C:\Users\Admin\AppData\Roaming\Server.exe
  C:\Users\Admin\AppData\Roaming\Server.exe
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Checks computer location settings
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2316
- - C:\Users\Admin\AppData\Roaming\windupdt\winupdate.exe
    "C:\Users\Admin\AppData\Roaming\windupdt\winupdate.exe"
    3⤵
    - Modifies firewall policy service
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4840
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 5 > NUL&del "C:\Users\Admin\AppData\Roaming\Server.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3148
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 5
      4⤵
      Runs ping.exe
      PID:4076

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Server.exe

Path C:\Users\Admin\AppData\Local\Temp\Server.exe
Size 240KB
SHA256 ab02bf0f4ceb942f441da1a1c761ea1b2c29af379d00be92510d3963813b817d
MD5 6361d6891bbbf269ad4a14541e79f8c0
SHA1 4ebd2c400000e22e4b1963999a90e3ac60e1fe86
SHA512 5a74021eb9aa2cd31325252af16df03627bacde201808c8fee19537f2bf987b8a549f9642b4511194c6db2a93808756293a338ae0ca6596610eea5cc15501e90
SSDEEP 6144:uUc8SY8u+rv6Kl9QFhC6z3sbS4P2UI9icyXV13kPKuzGnVAmsy:uUcrY8driIQHG2D1axkPKdpsy
MD5 SHA1 SHA512 SSDEEP

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7za.exe

Path C:\Users\Admin\AppData\Roaming\7za.exe
Size 574KB
SHA256 c136b1467d669a725478a6110ebaaab3cb88a3d389dfa688e06173c066b76fcf
MD5 42badc1d2f03a8b1e4875740d3d49336
SHA1 cee178da1fb05f99af7a3547093122893bd1eb46
SHA512 6bc519a7368ee6bd8c8f69f2d634dd18799b4ca31fbc284d2580ba625f3a88b6a52d2bc17bea0e75e63ca11c10356c47ee00c2c500294abcb5141424fc5dc71c
SSDEEP 12288:myyKdVnyNhXCV4EkP7AIfzNXZ0b5NrnkcAqIV0A1caRI:mKvyNhXCV4E8BXAfrnkcAqU0A
MD5 SHA1 SHA512 SSDEEP

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7za.exe

Path C:\Users\Admin\AppData\Roaming\7za.exe
Size 574KB
SHA256 c136b1467d669a725478a6110ebaaab3cb88a3d389dfa688e06173c066b76fcf
MD5 42badc1d2f03a8b1e4875740d3d49336
SHA1 cee178da1fb05f99af7a3547093122893bd1eb46
SHA512 6bc519a7368ee6bd8c8f69f2d634dd18799b4ca31fbc284d2580ba625f3a88b6a52d2bc17bea0e75e63ca11c10356c47ee00c2c500294abcb5141424fc5dc71c
SSDEEP 12288:myyKdVnyNhXCV4EkP7AIfzNXZ0b5NrnkcAqIV0A1caRI:mKvyNhXCV4E8BXAfrnkcAqU0A
MD5 SHA1 SHA512 SSDEEP

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Server.7z

Path C:\Users\Admin\AppData\Roaming\Server.7z
Size 235KB
SHA256 c97219f5a46fa8de3e98160f5fa1d61ebf2857244b3facd615158d7265b321e5
MD5 6f7a2f8c619e7bd86e9e67fa3db96a89
SHA1 460800b35f9db8fca565d9885e35c49dc742e7bb
SHA512 15d6b22197d589141b4111080a03ee00c3bbf733a8c57bf8940f184916c9339e0a1670c4c0f263e3b95cc80fb107a08e8fa3b864214fe729d7f71e91335495ce
SSDEEP 6144:foLxn9bG52yaF8sIGaUV1VlhEQmyItDYxQEJ0QNOrSX:fol9G52yzsGwVlhEd+hJfOuX
MD5 SHA1 SHA512 SSDEEP

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Server.exe

Path C:\Users\Admin\AppData\Roaming\Server.exe
Size 240KB
SHA256 ab02bf0f4ceb942f441da1a1c761ea1b2c29af379d00be92510d3963813b817d
MD5 6361d6891bbbf269ad4a14541e79f8c0
SHA1 4ebd2c400000e22e4b1963999a90e3ac60e1fe86
SHA512 5a74021eb9aa2cd31325252af16df03627bacde201808c8fee19537f2bf987b8a549f9642b4511194c6db2a93808756293a338ae0ca6596610eea5cc15501e90
SSDEEP 6144:uUc8SY8u+rv6Kl9QFhC6z3sbS4P2UI9icyXV13kPKuzGnVAmsy:uUcrY8driIQHG2D1axkPKdpsy
MD5 SHA1 SHA512 SSDEEP

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winupdate.exe

Path C:\Users\Admin\AppData\Roaming\windupdt\winupdate.exe
Size 240KB
SHA256 ab02bf0f4ceb942f441da1a1c761ea1b2c29af379d00be92510d3963813b817d
MD5 6361d6891bbbf269ad4a14541e79f8c0
SHA1 4ebd2c400000e22e4b1963999a90e3ac60e1fe86
SHA512 5a74021eb9aa2cd31325252af16df03627bacde201808c8fee19537f2bf987b8a549f9642b4511194c6db2a93808756293a338ae0ca6596610eea5cc15501e90
SSDEEP 6144:uUc8SY8u+rv6Kl9QFhC6z3sbS4P2UI9icyXV13kPKuzGnVAmsy:uUcrY8driIQHG2D1axkPKdpsy
MD5 SHA1 SHA512 SSDEEP

Submit Download

winupdate.exe

Path C:\Users\Admin\AppData\Roaming\windupdt\winupdate.exe
Size 240KB
SHA256 ab02bf0f4ceb942f441da1a1c761ea1b2c29af379d00be92510d3963813b817d
MD5 6361d6891bbbf269ad4a14541e79f8c0
SHA1 4ebd2c400000e22e4b1963999a90e3ac60e1fe86
SHA512 5a74021eb9aa2cd31325252af16df03627bacde201808c8fee19537f2bf987b8a549f9642b4511194c6db2a93808756293a338ae0ca6596610eea5cc15501e90
SSDEEP 6144:uUc8SY8u+rv6Kl9QFhC6z3sbS4P2UI9icyXV13kPKuzGnVAmsy:uUcrY8driIQHG2D1axkPKdpsy
MD5 SHA1 SHA512 SSDEEP

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memory/2220-132-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/2220-149-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/2316-141-0x0000000000400000-0x00000000004BA000-memory.dmp

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memory/2316-146-0x0000000000400000-0x00000000004BA000-memory.dmp

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memory/4840-148-0x0000000000400000-0x00000000004BA000-memory.dmp

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memory/4840-150-0x0000000000400000-0x00000000004BA000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads