Analysis

  • max time kernel
    158s
  • max time network
    162s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/01/2024, 03:05

General

  • Target

    latest.exe

  • Size

    756KB

  • MD5

    3d44f7937fb46ea4de708e90a4ca4587

  • SHA1

    db54473365d6aa656523607286c777ce37aee53b

  • SHA256

    f993cc832ebf9603779a0d03ef696305818f27d0edf14dca665eb8571b13b98e

  • SHA512

    c4d686e875ad26e5debed497630d7d1e6acecf64864928375fbd09130b9761fa54e623b9d41b2d984ee4a4f5b83debb2f194a485242fdad70ecec17dbfeae2fe

  • SSDEEP

    12288:x9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hz:rZ1xuVVjfFoynPaVBUR8f+kN10EB1

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

122.176.133.66:2181

Mutex

DC_MUTEX-10VBW8X

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    EVjYUENRn40t

  • install

    true

  • offline_keylogger

    true

  • password

    hacker667

  • persistence

    true

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Sets file to hidden 1 TTPs 2 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.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\latest.exe
    "C:\Users\Admin\AppData\Local\Temp\latest.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4408
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\latest.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4896
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\latest.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1928
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3916
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:1152
    • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
      "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1932
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Adds Run key to start application
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1836
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
            PID:1796

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

            Filesize

            756KB

            MD5

            3d44f7937fb46ea4de708e90a4ca4587

            SHA1

            db54473365d6aa656523607286c777ce37aee53b

            SHA256

            f993cc832ebf9603779a0d03ef696305818f27d0edf14dca665eb8571b13b98e

            SHA512

            c4d686e875ad26e5debed497630d7d1e6acecf64864928375fbd09130b9761fa54e623b9d41b2d984ee4a4f5b83debb2f194a485242fdad70ecec17dbfeae2fe

          • memory/1796-66-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

            Filesize

            4KB

          • memory/1836-64-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB

          • memory/1932-63-0x0000000002180000-0x0000000002181000-memory.dmp

            Filesize

            4KB

          • memory/1932-65-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB

          • memory/4408-0-0x00000000022A0000-0x00000000022A1000-memory.dmp

            Filesize

            4KB

          • memory/4408-52-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB