darkcomet | 59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23

Analysis

max time kernel
150s
max time network
145s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
26-11-2022 02:04

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General

Target

59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Size

659KB
MD5

4e91146d12250f89a4392770d4e89313
SHA1

b24be6a2eccfb8c6f7955cd5f6929d44ebcdd13e
SHA256

59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23
SHA512

feb1d1055e14c702c61c41bdcee1c76dcef637abe242a46b56b1547f8a5e2a34225f2562379c785ed040c032d3891e5a003271020d958ed1215b7d00786d1d50
SSDEEP

12288:G9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hw:iZ1xuVVjfFoynPaVBUR8f+kN10EBm

Score

10^/10

darkcomet lena evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Lena

94.180.46.70:1604

Mutex

DC_MUTEX-UA0ZG0W

Attributes

InstallPath
windlogon.exe
gencode
wZvu2vV0X3gE
install
true
offline_keylogger
true
persistence
false
reg_key
windlogon

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:\\Windows\\system32\\windlogon.exe"	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

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

Modifies security service 2 TTPs 1 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

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

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	windlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	windlogon.exe

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	windlogon.exe

Executes dropped EXE 1 IoCs

pid	Process
1388	windlogon.exe

Loads dropped DLL 2 IoCs

pid	Process
1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	windlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	windlogon.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\windlogon = "C:\\Windows\\system32\\windlogon.exe"	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\windlogon.exe	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
File opened for modification	C:\Windows\SysWOW64\windlogon.exe	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
File opened for modification	C:\Windows\SysWOW64\	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.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

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeSecurityPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeTakeOwnershipPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeLoadDriverPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeSystemProfilePrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeSystemtimePrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeProfSingleProcessPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeIncBasePriorityPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeCreatePagefilePrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeBackupPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeRestorePrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeShutdownPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeDebugPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeSystemEnvironmentPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeChangeNotifyPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeRemoteShutdownPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeUndockPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeManageVolumePrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeImpersonatePrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeCreateGlobalPrivilege	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: 33	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: 34	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: 35	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
Token: SeIncreaseQuotaPrivilege	1388	windlogon.exe
Token: SeSecurityPrivilege	1388	windlogon.exe
Token: SeTakeOwnershipPrivilege	1388	windlogon.exe
Token: SeLoadDriverPrivilege	1388	windlogon.exe
Token: SeSystemProfilePrivilege	1388	windlogon.exe
Token: SeSystemtimePrivilege	1388	windlogon.exe
Token: SeProfSingleProcessPrivilege	1388	windlogon.exe
Token: SeIncBasePriorityPrivilege	1388	windlogon.exe
Token: SeCreatePagefilePrivilege	1388	windlogon.exe
Token: SeBackupPrivilege	1388	windlogon.exe
Token: SeRestorePrivilege	1388	windlogon.exe
Token: SeShutdownPrivilege	1388	windlogon.exe
Token: SeDebugPrivilege	1388	windlogon.exe
Token: SeSystemEnvironmentPrivilege	1388	windlogon.exe
Token: SeChangeNotifyPrivilege	1388	windlogon.exe
Token: SeRemoteShutdownPrivilege	1388	windlogon.exe
Token: SeUndockPrivilege	1388	windlogon.exe
Token: SeManageVolumePrivilege	1388	windlogon.exe
Token: SeImpersonatePrivilege	1388	windlogon.exe
Token: SeCreateGlobalPrivilege	1388	windlogon.exe
Token: 33	1388	windlogon.exe
Token: 34	1388	windlogon.exe
Token: 35	1388	windlogon.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1388	windlogon.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1492 wrote to memory of 1388	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe	27
PID 1492 wrote to memory of 1388	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe	27
PID 1492 wrote to memory of 1388	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe	27
PID 1492 wrote to memory of 1388	1492	59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe	27
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28
PID 1388 wrote to memory of 576	1388	windlogon.exe	28

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion	windlogon.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern	windlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1"	windlogon.exe

C:\Users\Admin\AppData\Local\Temp\59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.exe
"C:\Users\Admin\AppData\Local\Temp\59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23.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:1492
- C:\Windows\SysWOW64\windlogon.exe
  "C:\Windows\system32\windlogon.exe"
  2⤵
  - Modifies firewall policy service
  - Modifies security service
  - Windows security bypass
  - Disables RegEdit via registry modification
  - Executes dropped EXE
  - Windows security modification
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:1388
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    PID:576

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

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\windlogon.exe

Filesize
659KB

MD5
4e91146d12250f89a4392770d4e89313

SHA1
b24be6a2eccfb8c6f7955cd5f6929d44ebcdd13e

SHA256
59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23

SHA512
feb1d1055e14c702c61c41bdcee1c76dcef637abe242a46b56b1547f8a5e2a34225f2562379c785ed040c032d3891e5a003271020d958ed1215b7d00786d1d50

Download Submit
C:\Windows\SysWOW64\windlogon.exe

Filesize
659KB

MD5
4e91146d12250f89a4392770d4e89313

SHA1
b24be6a2eccfb8c6f7955cd5f6929d44ebcdd13e

SHA256
59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23

SHA512
feb1d1055e14c702c61c41bdcee1c76dcef637abe242a46b56b1547f8a5e2a34225f2562379c785ed040c032d3891e5a003271020d958ed1215b7d00786d1d50

Download Submit
\Windows\SysWOW64\windlogon.exe

Filesize
659KB

MD5
4e91146d12250f89a4392770d4e89313

SHA1
b24be6a2eccfb8c6f7955cd5f6929d44ebcdd13e

SHA256
59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23

SHA512
feb1d1055e14c702c61c41bdcee1c76dcef637abe242a46b56b1547f8a5e2a34225f2562379c785ed040c032d3891e5a003271020d958ed1215b7d00786d1d50

Download Submit
\Windows\SysWOW64\windlogon.exe

Filesize
659KB

MD5
4e91146d12250f89a4392770d4e89313

SHA1
b24be6a2eccfb8c6f7955cd5f6929d44ebcdd13e

SHA256
59235141af41313f250d39a900b34389e30acba1bca01465859e0bd7dc5daf23

SHA512
feb1d1055e14c702c61c41bdcee1c76dcef637abe242a46b56b1547f8a5e2a34225f2562379c785ed040c032d3891e5a003271020d958ed1215b7d00786d1d50

Download Submit
memory/576-61-0x0000000000000000-mapping.dmp

Download
memory/1388-57-0x0000000000000000-mapping.dmp

Download
memory/1492-54-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads