darkcomet | 90ae5ff01272a009011a6afbd9a6bc116102d14ed3843e42b67c10814107afe3

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
04/03/2024, 03:50

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General

Target
b1259af9107e1e12cda1b55a55999727.exe
Size 1024KB
Sample240304-ed9lrshh85
SHA256 90ae5ff01272a009011a6afbd9a6bc116102d14ed3843e42b67c10814107afe3
MD5 b1259af9107e1e12cda1b55a55999727
SHA1 27ea1754244f3dfb49c298698152de2cf1027f9e
SHA512 aee17a2dee3586c870454b098f376d20a49cffd4c76a16387f1cb5f6a6fe8176190ad7e9e20b44d63d26193b75b2e811943c98229b205f5ad17158b428f23b2d
SSDEEP 24576:EWLJaliyy+4CXeyOeXTT6oW4byedwN00SJ:PLiReXo6cO00S
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet bootkit persistence rat trojan

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

T1547.004

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\\MSDCSC\\msdcsc.exe"	b1259af9107e1e12cda1b55a55999727.exe

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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	b1259af9107e1e12cda1b55a55999727.exe

Executes dropped EXE 3 IoCs

pid	Process
3412	msdcsc.exe
4528	msdcsc.exe
4268	msdcsc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\MSDCSC\\msdcsc.exe"	b1259af9107e1e12cda1b55a55999727.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\MSDCSC\\msdcsc.exe"	msdcsc.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	b1259af9107e1e12cda1b55a55999727.exe
File opened for modification	\??\PhysicalDrive0	msdcsc.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2012 set thread context of 4700	2012	b1259af9107e1e12cda1b55a55999727.exe	89
PID 4700 set thread context of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 3412 set thread context of 4528	3412	msdcsc.exe	95
PID 4528 set thread context of 4268	4528	msdcsc.exe	96

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

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4828	PING.EXE

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeSecurityPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeTakeOwnershipPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeLoadDriverPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeSystemProfilePrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeSystemtimePrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeProfSingleProcessPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeIncBasePriorityPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeCreatePagefilePrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeBackupPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeRestorePrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeShutdownPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeDebugPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeSystemEnvironmentPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeChangeNotifyPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeRemoteShutdownPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeUndockPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeManageVolumePrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeImpersonatePrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeCreateGlobalPrivilege	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: 33	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: 34	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: 35	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: 36	5036	b1259af9107e1e12cda1b55a55999727.exe
Token: SeIncreaseQuotaPrivilege	4268	msdcsc.exe
Token: SeSecurityPrivilege	4268	msdcsc.exe
Token: SeTakeOwnershipPrivilege	4268	msdcsc.exe
Token: SeLoadDriverPrivilege	4268	msdcsc.exe
Token: SeSystemProfilePrivilege	4268	msdcsc.exe
Token: SeSystemtimePrivilege	4268	msdcsc.exe
Token: SeProfSingleProcessPrivilege	4268	msdcsc.exe
Token: SeIncBasePriorityPrivilege	4268	msdcsc.exe
Token: SeCreatePagefilePrivilege	4268	msdcsc.exe
Token: SeBackupPrivilege	4268	msdcsc.exe
Token: SeRestorePrivilege	4268	msdcsc.exe
Token: SeShutdownPrivilege	4268	msdcsc.exe
Token: SeDebugPrivilege	4268	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	4268	msdcsc.exe
Token: SeChangeNotifyPrivilege	4268	msdcsc.exe
Token: SeRemoteShutdownPrivilege	4268	msdcsc.exe
Token: SeUndockPrivilege	4268	msdcsc.exe
Token: SeManageVolumePrivilege	4268	msdcsc.exe
Token: SeImpersonatePrivilege	4268	msdcsc.exe
Token: SeCreateGlobalPrivilege	4268	msdcsc.exe
Token: 33	4268	msdcsc.exe
Token: 34	4268	msdcsc.exe
Token: 35	4268	msdcsc.exe
Token: 36	4268	msdcsc.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
2012	b1259af9107e1e12cda1b55a55999727.exe
4700	b1259af9107e1e12cda1b55a55999727.exe
3412	msdcsc.exe
4528	msdcsc.exe
4268	msdcsc.exe

Suspicious use of WriteProcessMemory 53 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 4700	2012	b1259af9107e1e12cda1b55a55999727.exe	89
PID 2012 wrote to memory of 4700	2012	b1259af9107e1e12cda1b55a55999727.exe	89
PID 2012 wrote to memory of 4700	2012	b1259af9107e1e12cda1b55a55999727.exe	89
PID 2012 wrote to memory of 4700	2012	b1259af9107e1e12cda1b55a55999727.exe	89
PID 2012 wrote to memory of 4700	2012	b1259af9107e1e12cda1b55a55999727.exe	89
PID 2012 wrote to memory of 4700	2012	b1259af9107e1e12cda1b55a55999727.exe	89
PID 2012 wrote to memory of 4700	2012	b1259af9107e1e12cda1b55a55999727.exe	89
PID 2012 wrote to memory of 4700	2012	b1259af9107e1e12cda1b55a55999727.exe	89
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 4700 wrote to memory of 5036	4700	b1259af9107e1e12cda1b55a55999727.exe	90
PID 5036 wrote to memory of 3760	5036	b1259af9107e1e12cda1b55a55999727.exe	91
PID 5036 wrote to memory of 3760	5036	b1259af9107e1e12cda1b55a55999727.exe	91
PID 5036 wrote to memory of 3760	5036	b1259af9107e1e12cda1b55a55999727.exe	91
PID 5036 wrote to memory of 3412	5036	b1259af9107e1e12cda1b55a55999727.exe	93
PID 5036 wrote to memory of 3412	5036	b1259af9107e1e12cda1b55a55999727.exe	93
PID 5036 wrote to memory of 3412	5036	b1259af9107e1e12cda1b55a55999727.exe	93
PID 3760 wrote to memory of 4828	3760	cmd.exe	94
PID 3760 wrote to memory of 4828	3760	cmd.exe	94
PID 3760 wrote to memory of 4828	3760	cmd.exe	94
PID 3412 wrote to memory of 4528	3412	msdcsc.exe	95
PID 3412 wrote to memory of 4528	3412	msdcsc.exe	95
PID 3412 wrote to memory of 4528	3412	msdcsc.exe	95
PID 3412 wrote to memory of 4528	3412	msdcsc.exe	95
PID 3412 wrote to memory of 4528	3412	msdcsc.exe	95
PID 3412 wrote to memory of 4528	3412	msdcsc.exe	95
PID 3412 wrote to memory of 4528	3412	msdcsc.exe	95
PID 3412 wrote to memory of 4528	3412	msdcsc.exe	95
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96
PID 4528 wrote to memory of 4268	4528	msdcsc.exe	96

C:\Users\Admin\AppData\Local\Temp\b1259af9107e1e12cda1b55a55999727.exe
"C:\Users\Admin\AppData\Local\Temp\b1259af9107e1e12cda1b55a55999727.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Users\Admin\AppData\Local\Temp\b1259af9107e1e12cda1b55a55999727.exe
  "C:\Users\Admin\AppData\Local\Temp\b1259af9107e1e12cda1b55a55999727.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4700
- - C:\Users\Admin\AppData\Local\Temp\b1259af9107e1e12cda1b55a55999727.exe
    "C:\Users\Admin\AppData\Local\Temp\b1259af9107e1e12cda1b55a55999727.exe"
    3⤵
    - Modifies WinLogon for persistence
    - Checks computer location settings
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:5036
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3760
    - - C:\Windows\SysWOW64\PING.EXE
        
        ping 127.0.0.1 -n 5
        5⤵
        Runs ping.exe
        
        PID:4828
  - - C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
      "C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3412
    - - C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
        
        "C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"
        5⤵
        Executes dropped EXE
        Writes to the Master Boot Record (MBR)
        Suspicious use of SetThreadContext
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:4528
      - C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
        
        "C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        
        PID:4268

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

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

tmpcmd.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat
Size 99B
SHA256 11b7e28d099d5e270394666fbdf1286d5f77878dc74e627b9247ee832fb87d52
MD5 56e302dc07ce1d68e30fd3f4a9d93df0
SHA1 7692422c09e7b66a382eb0c3e3c3ebb7f7a4a0af
SHA512 b4a22d52103691a35b4b328e8da97d80a11793b7daa211030ffcaa1580ea1355fc5e1315feae63d72d263a6bff9e3e5853bec8085aab10018012f88963ef17fb
MD5 SHA1 SHA512

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msdcsc.exe

Path C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
Size 1024KB
SHA256 90ae5ff01272a009011a6afbd9a6bc116102d14ed3843e42b67c10814107afe3
MD5 b1259af9107e1e12cda1b55a55999727
SHA1 27ea1754244f3dfb49c298698152de2cf1027f9e
SHA512 aee17a2dee3586c870454b098f376d20a49cffd4c76a16387f1cb5f6a6fe8176190ad7e9e20b44d63d26193b75b2e811943c98229b205f5ad17158b428f23b2d
SSDEEP 24576:EWLJaliyy+4CXeyOeXTT6oW4byedwN00SJ:PLiReXo6cO00S
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2012-0-0x0000000000400000-0x00000000004F0000-memory.dmp

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memory/3412-30-0x0000000000400000-0x00000000004F0000-memory.dmp

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memory/4268-57-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-59-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-66-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-65-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-64-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-63-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-62-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-61-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-60-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-58-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-46-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-48-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-49-0x0000000002180000-0x0000000002181000-memory.dmp

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memory/4268-50-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-51-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-52-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-53-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-54-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-55-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4268-56-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4528-45-0x0000000000400000-0x00000000004C0000-memory.dmp

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memory/4700-3-0x0000000000400000-0x00000000004C0000-memory.dmp

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memory/4700-10-0x0000000000400000-0x00000000004C0000-memory.dmp

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memory/4700-5-0x0000000000400000-0x00000000004C0000-memory.dmp

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memory/5036-8-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/5036-31-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/5036-9-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/5036-14-0x00000000022C0000-0x00000000022C1000-memory.dmp

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memory/5036-13-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/5036-11-0x0000000000400000-0x00000000004C3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads