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Analysis

  • max time kernel
    276s
  • max time network
    278s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/10/2023, 21:03

General

  • Target

    Hack X1000 1.1.exe

  • Size

    756KB

  • MD5

    74b69971031e3ed8edac827863f464cb

  • SHA1

    97f44a38f292cad03e716857b113a4cb60bc199e

  • SHA256

    5ff3a8d4425ada0f861da4b8177348506e0ba8870dd72ebdb5f58699f6eb69f9

  • SHA512

    0002a9c817da27df65c242627d64a987dfa5f8a55e7fec55754d0678bf37e1dbb9628691b11195a1378f39eba69e0940215ea6a883a964ca42a905e8d75d206c

  • SSDEEP

    12288:V9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hu:fZ1xuVVjfFoynPaVBUR8f+kN10EBk

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

192.168.1.8:4444

Mutex

DC_MUTEX-26BR6RC

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    njZx3Bkpuz6x

  • 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
  • Modifies firewall policy service 2 TTPs 6 IoCs
  • Modifies security service 2 TTPs 2 IoCs
  • Windows security bypass 2 TTPs 4 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables Task Manager via registry modification
  • 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
  • Windows security modification 2 TTPs 2 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 59 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Hack X1000 1.1.exe
    "C:\Users\Admin\AppData\Local\Temp\Hack X1000 1.1.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:3420
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\Hack X1000 1.1.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4144
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\Hack X1000 1.1.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:3596
    • 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:916
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:3100
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
        PID:4792
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        2⤵
        • Modifies firewall policy service
        • Modifies security service
        • Windows security bypass
        • Disables RegEdit via registry modification
        • Executes dropped EXE
        • Windows security modification
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:4904
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
          3⤵
          • Modifies firewall policy service
          • Modifies security service
          • Windows security bypass
          • Disables RegEdit via registry modification
          • Adds Run key to start application
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4744
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            4⤵
              PID:3244

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        756KB

        MD5

        74b69971031e3ed8edac827863f464cb

        SHA1

        97f44a38f292cad03e716857b113a4cb60bc199e

        SHA256

        5ff3a8d4425ada0f861da4b8177348506e0ba8870dd72ebdb5f58699f6eb69f9

        SHA512

        0002a9c817da27df65c242627d64a987dfa5f8a55e7fec55754d0678bf37e1dbb9628691b11195a1378f39eba69e0940215ea6a883a964ca42a905e8d75d206c

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

        Filesize

        756KB

        MD5

        74b69971031e3ed8edac827863f464cb

        SHA1

        97f44a38f292cad03e716857b113a4cb60bc199e

        SHA256

        5ff3a8d4425ada0f861da4b8177348506e0ba8870dd72ebdb5f58699f6eb69f9

        SHA512

        0002a9c817da27df65c242627d64a987dfa5f8a55e7fec55754d0678bf37e1dbb9628691b11195a1378f39eba69e0940215ea6a883a964ca42a905e8d75d206c

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

        Filesize

        756KB

        MD5

        74b69971031e3ed8edac827863f464cb

        SHA1

        97f44a38f292cad03e716857b113a4cb60bc199e

        SHA256

        5ff3a8d4425ada0f861da4b8177348506e0ba8870dd72ebdb5f58699f6eb69f9

        SHA512

        0002a9c817da27df65c242627d64a987dfa5f8a55e7fec55754d0678bf37e1dbb9628691b11195a1378f39eba69e0940215ea6a883a964ca42a905e8d75d206c

      • memory/3244-67-0x0000000001220000-0x0000000001221000-memory.dmp

        Filesize

        4KB

      • memory/3420-0-0x00000000022D0000-0x00000000022D1000-memory.dmp

        Filesize

        4KB

      • memory/3420-63-0x00000000022D0000-0x00000000022D1000-memory.dmp

        Filesize

        4KB

      • memory/3420-68-0x0000000000400000-0x00000000004CA000-memory.dmp

        Filesize

        808KB

      • memory/4744-65-0x0000000000400000-0x00000000004CA000-memory.dmp

        Filesize

        808KB

      • memory/4792-4-0x0000000001140000-0x0000000001141000-memory.dmp

        Filesize

        4KB

      • memory/4904-64-0x00000000022E0000-0x00000000022E1000-memory.dmp

        Filesize

        4KB

      • memory/4904-66-0x0000000000400000-0x00000000004CA000-memory.dmp

        Filesize

        808KB