Analysis

  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-12-2024 07:43

General

  • Target

    2d8d55b1a2040a041c217333c1fff62f927bf29b3049963a815e29934f3f8418N.exe

  • Size

    911KB

  • MD5

    c6124a942c55b07895302856e06a9d90

  • SHA1

    792dcfe853839096cd815020cc084c00efea3eef

  • SHA256

    2d8d55b1a2040a041c217333c1fff62f927bf29b3049963a815e29934f3f8418

  • SHA512

    a79dee40098c9293de69fdf8564231a1d8cef29e0cb85b7b182e9ae4c5746467c660c6eba7395b04497b7839e6cfd66874697bfb532f479c199e08ffbbf62c1a

  • SSDEEP

    12288:GJd7xDyNZHN32RDRua9FZzrGHQTMDPnA46X3/aeSGxF10mhXWty7Xy5mQmkR/zEC:6dtuNtN32rRLZqQyp4HSGxZhXWO5C

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

efosa94949.no-ip.biz:1604

Mutex

DC_MUTEX-7SCGJWM

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    k0FWSrLTENGX

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies firewall policy service 3 TTPs 3 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 21 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2d8d55b1a2040a041c217333c1fff62f927bf29b3049963a815e29934f3f8418N.exe
    "C:\Users\Admin\AppData\Local\Temp\2d8d55b1a2040a041c217333c1fff62f927bf29b3049963a815e29934f3f8418N.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4120
    • C:\Users\Admin\AppData\Local\Temp\2d8d55b1a2040a041c217333c1fff62f927bf29b3049963a815e29934f3f8418N.exe
      C:\Users\Admin\AppData\Local\Temp\2d8d55b1a2040a041c217333c1fff62f927bf29b3049963a815e29934f3f8418N.exe
      2⤵
      • Modifies WinLogon for persistence
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3284
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4760
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:4280
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • Deletes itself
        • System Location Discovery: System Language Discovery
        PID:4540
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:780
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          4⤵
          • Modifies firewall policy service
          • Modifies security service
          • Windows security bypass
          • Disables RegEdit via registry modification
          • Executes dropped EXE
          • Windows security modification
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:3492
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
            • System Location Discovery: System Language Discovery
            PID:2092

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

    Filesize

    911KB

    MD5

    c6124a942c55b07895302856e06a9d90

    SHA1

    792dcfe853839096cd815020cc084c00efea3eef

    SHA256

    2d8d55b1a2040a041c217333c1fff62f927bf29b3049963a815e29934f3f8418

    SHA512

    a79dee40098c9293de69fdf8564231a1d8cef29e0cb85b7b182e9ae4c5746467c660c6eba7395b04497b7839e6cfd66874697bfb532f479c199e08ffbbf62c1a

  • memory/2092-45-0x0000000000D70000-0x0000000000D71000-memory.dmp

    Filesize

    4KB

  • memory/3284-1-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3284-2-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3284-3-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3284-4-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3284-5-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3284-48-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-56-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-53-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-46-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-44-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-61-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-51-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-52-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-60-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-54-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-55-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-47-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-57-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-58-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3492-59-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/4120-0-0x00000000007B0000-0x00000000007B4000-memory.dmp

    Filesize

    16KB

  • memory/4540-9-0x00000000010C0000-0x00000000010C1000-memory.dmp

    Filesize

    4KB