Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/10/2022, 06:15

General

  • Target

    fb4cd6a6485ddf6c6f0325e6b795cfd85d24ac962b025c7b4d70d8c265e8591e.exe

  • Size

    824KB

  • MD5

    60be5a06e0c4b00ba862f92c7e2b0a45

  • SHA1

    4a4b2ea657429c71f83aeb054b0c91ef73a6fa80

  • SHA256

    fb4cd6a6485ddf6c6f0325e6b795cfd85d24ac962b025c7b4d70d8c265e8591e

  • SHA512

    9f4706ee20226ec48b997ed8beaad277a05045fcfb8ace9c25f49b4c71e7fe8cfa2335af93258c0f6c1028622a53ccfe237a3dcf4e2f3d0bf00f712cecea787a

  • SSDEEP

    24576:QpTFaFoXBnpw8bzRhObDkvEbSDKC2UmKaHZp4m:QpTFuYBny0zD0DkvG8mKQCm

Malware Config

Extracted

Family

darkcomet

Botnet

Online

C2

nomsrat.sytes.net:200

nomsrat.sytes.net:1064

Mutex

DC_MUTEX-TGE5TU1

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    GV9ZvrdZAjNP

  • install

    true

  • offline_keylogger

    true

  • 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
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

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

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 51 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fb4cd6a6485ddf6c6f0325e6b795cfd85d24ac962b025c7b4d70d8c265e8591e.exe
    "C:\Users\Admin\AppData\Local\Temp\fb4cd6a6485ddf6c6f0325e6b795cfd85d24ac962b025c7b4d70d8c265e8591e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:920
    • C:\Users\Admin\AppData\Local\Temp\fb4cd6a6485ddf6c6f0325e6b795cfd85d24ac962b025c7b4d70d8c265e8591e.exe
      C:\Users\Admin\AppData\Local\Temp\fb4cd6a6485ddf6c6f0325e6b795cfd85d24ac962b025c7b4d70d8c265e8591e.exe
      2⤵
      • 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:4492
      • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
        "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3380
        • C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
          C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:3192
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
              PID:3504

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            824KB

            MD5

            60be5a06e0c4b00ba862f92c7e2b0a45

            SHA1

            4a4b2ea657429c71f83aeb054b0c91ef73a6fa80

            SHA256

            fb4cd6a6485ddf6c6f0325e6b795cfd85d24ac962b025c7b4d70d8c265e8591e

            SHA512

            9f4706ee20226ec48b997ed8beaad277a05045fcfb8ace9c25f49b4c71e7fe8cfa2335af93258c0f6c1028622a53ccfe237a3dcf4e2f3d0bf00f712cecea787a

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

            Filesize

            824KB

            MD5

            60be5a06e0c4b00ba862f92c7e2b0a45

            SHA1

            4a4b2ea657429c71f83aeb054b0c91ef73a6fa80

            SHA256

            fb4cd6a6485ddf6c6f0325e6b795cfd85d24ac962b025c7b4d70d8c265e8591e

            SHA512

            9f4706ee20226ec48b997ed8beaad277a05045fcfb8ace9c25f49b4c71e7fe8cfa2335af93258c0f6c1028622a53ccfe237a3dcf4e2f3d0bf00f712cecea787a

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

            Filesize

            824KB

            MD5

            60be5a06e0c4b00ba862f92c7e2b0a45

            SHA1

            4a4b2ea657429c71f83aeb054b0c91ef73a6fa80

            SHA256

            fb4cd6a6485ddf6c6f0325e6b795cfd85d24ac962b025c7b4d70d8c265e8591e

            SHA512

            9f4706ee20226ec48b997ed8beaad277a05045fcfb8ace9c25f49b4c71e7fe8cfa2335af93258c0f6c1028622a53ccfe237a3dcf4e2f3d0bf00f712cecea787a

          • memory/3192-146-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB

          • memory/3192-147-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB

          • memory/4492-135-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB

          • memory/4492-136-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB

          • memory/4492-134-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB

          • memory/4492-133-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB