Analysis

  • max time kernel
    150s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240730-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-07-2024 02:50

General

  • Target

    34548c36fa9c6322887e5a9374735abe_JaffaCakes118.exe

  • Size

    690KB

  • MD5

    34548c36fa9c6322887e5a9374735abe

  • SHA1

    fb1b0f0abca304c5a0c2f8ab13526a7aadcea48d

  • SHA256

    1b5199a1d887ff4763b382aeafcaf2d49e354ed97b1f610984574a60ff326c77

  • SHA512

    b9ba9efa38d2e50b1e9b04099ead7725897879c360f8bfb80ed7a5b7282b9c86660b6a70b858dd85372f1851421a454d4988f5c05439282ea7fdaf3bbc505aeb

  • SSDEEP

    12288:p9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hT6:zZ1xuVVjfFoynPaVBUR8f+kN10EBw

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

127.0.0.1:1604

Mutex

DC_MUTEX-QWSK3NR

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    LdZbQGjmRsr1

  • 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 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
  • 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 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 7 IoCs

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

  • 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 37 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\34548c36fa9c6322887e5a9374735abe_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\34548c36fa9c6322887e5a9374735abe_JaffaCakes118.exe"
    1⤵
    • 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:1496
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\34548c36fa9c6322887e5a9374735abe_JaffaCakes118.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4528
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\34548c36fa9c6322887e5a9374735abe_JaffaCakes118.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:4312
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3716
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:1736
    • C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
      "C:\Users\Admin\AppData\Roaming\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
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:1412
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2088

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe

    Filesize

    690KB

    MD5

    34548c36fa9c6322887e5a9374735abe

    SHA1

    fb1b0f0abca304c5a0c2f8ab13526a7aadcea48d

    SHA256

    1b5199a1d887ff4763b382aeafcaf2d49e354ed97b1f610984574a60ff326c77

    SHA512

    b9ba9efa38d2e50b1e9b04099ead7725897879c360f8bfb80ed7a5b7282b9c86660b6a70b858dd85372f1851421a454d4988f5c05439282ea7fdaf3bbc505aeb

  • memory/1412-62-0x0000000002170000-0x0000000002171000-memory.dmp

    Filesize

    4KB

  • memory/1412-65-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1496-0-0x00000000006D0000-0x00000000006D1000-memory.dmp

    Filesize

    4KB

  • memory/1496-64-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/2088-63-0x0000000000CB0000-0x0000000000CB1000-memory.dmp

    Filesize

    4KB