Analysis

  • max time kernel
    172s
  • max time network
    187s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-11-2022 15:31

General

  • Target

    abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe

  • Size

    604KB

  • MD5

    dc25d3ac1d767c4d12879c89602acfcb

  • SHA1

    53464889ff3e1792094e3ceb065539fccc82e9fe

  • SHA256

    abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

  • SHA512

    45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

  • SSDEEP

    12288:nw0S2XJbOAWPnp98pqBlBPh1U35s2dfnRBqU/x4ySG2GR:nnhX0AooO83fdfRwU54yV

Malware Config

Extracted

Family

darkcomet

Botnet

Victim

C2

jrusse.no-ip.org:5050

Mutex

DC_MUTEX-SANCFCW

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    Xl6PgidaJaTh

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    rundll32

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
  • 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.

  • 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 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe
    "C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4640
    • C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe
      "C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe"
      2⤵
        PID:364
      • C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe
        "C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe"
        2⤵
          PID:1956
        • C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe
          "C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.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:1332
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe" +s +h
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:760
            • C:\Windows\SysWOW64\attrib.exe
              attrib "C:\Users\Admin\AppData\Local\Temp\abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f.exe" +s +h
              4⤵
              • Sets file to hidden
              • Views/modifies file attributes
              PID:4084
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:424
            • C:\Windows\SysWOW64\attrib.exe
              attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
              4⤵
              • Sets file to hidden
              • Views/modifies file attributes
              PID:204
          • 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:1908
            • 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:2924
              • C:\Windows\SysWOW64\notepad.exe
                notepad
                5⤵
                  PID:3396

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          604KB

          MD5

          dc25d3ac1d767c4d12879c89602acfcb

          SHA1

          53464889ff3e1792094e3ceb065539fccc82e9fe

          SHA256

          abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

          SHA512

          45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

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

          Filesize

          604KB

          MD5

          dc25d3ac1d767c4d12879c89602acfcb

          SHA1

          53464889ff3e1792094e3ceb065539fccc82e9fe

          SHA256

          abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

          SHA512

          45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

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

          Filesize

          604KB

          MD5

          dc25d3ac1d767c4d12879c89602acfcb

          SHA1

          53464889ff3e1792094e3ceb065539fccc82e9fe

          SHA256

          abd6e01a50393d49ccf055013c9347add2a83e2e735e52aefd9fce1c9f0c868f

          SHA512

          45f707f1b13e36ae008ae75efc4957f1f95cf7098c520b94d6fb854c573e1a72b488a1163d55a47129bf7922fabb8dbd982a04f4d20dfff79a1f178eb896e1b4

        • memory/204-151-0x0000000000000000-mapping.dmp

        • memory/424-149-0x0000000000000000-mapping.dmp

        • memory/760-147-0x0000000000000000-mapping.dmp

        • memory/1332-141-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1332-133-0x0000000000000000-mapping.dmp

        • memory/1332-142-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1332-144-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1332-145-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1332-173-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1332-148-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1332-140-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1332-138-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1332-134-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1332-136-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1332-135-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/1908-152-0x0000000000000000-mapping.dmp

        • memory/1908-155-0x0000000072600000-0x0000000072BB1000-memory.dmp

          Filesize

          5.7MB

        • memory/1908-171-0x0000000072600000-0x0000000072BB1000-memory.dmp

          Filesize

          5.7MB

        • memory/2924-156-0x0000000000000000-mapping.dmp

        • memory/2924-170-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/2924-174-0x0000000000400000-0x00000000004B2000-memory.dmp

          Filesize

          712KB

        • memory/3396-172-0x0000000000000000-mapping.dmp

        • memory/4084-150-0x0000000000000000-mapping.dmp

        • memory/4640-132-0x0000000075570000-0x0000000075B21000-memory.dmp

          Filesize

          5.7MB

        • memory/4640-146-0x0000000075570000-0x0000000075B21000-memory.dmp

          Filesize

          5.7MB