Analysis

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

    arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-07-2024 22:42

General

  • Target

    7e39b75cfb9bf100c278d836f195c976_JaffaCakes118.exe

  • Size

    235KB

  • MD5

    7e39b75cfb9bf100c278d836f195c976

  • SHA1

    20371839ffc67e51c7098a559eb4e169eb7634d0

  • SHA256

    fc7b749f4b9d3e0a4778fa7d9c1294fe692d6904d14d9583682c344d80594d2a

  • SHA512

    88b4e8de71352a43ee31457955d7769dcd6926af3dfd4d857f44e4c8ad3df1da1e76bef4e66851dbc47be78bc1c4b4e1cca2b336e68a86e53ef605c18ca0a013

  • SSDEEP

    3072:iY/ygXnCQUYy9yxhjrSsplyU5iHquGbT47mJaCki/q/7NRgOYromMD8goZ9yz28q:iYLtU7Ixhnhz5TN6mJWd/7qMD8gmggf

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

themagician1970.no-ip.org:81

Mutex

DC_MUTEX-3UC1ZGZ

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    1UzPYfvG7H1j

  • 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 6 IoCs
  • Windows security bypass 2 TTPs 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.

  • Executes dropped EXE 1 IoCs
  • Windows security modification 2 TTPs 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).

  • System Location Discovery: System Language Discovery 1 TTPs 8 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 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\7e39b75cfb9bf100c278d836f195c976_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\7e39b75cfb9bf100c278d836f195c976_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:4804
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\7e39b75cfb9bf100c278d836f195c976_JaffaCakes118.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4320
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\7e39b75cfb9bf100c278d836f195c976_JaffaCakes118.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:216
    • 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:220
      • 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:5100
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies firewall policy service
      • Windows security bypass
      • Executes dropped EXE
      • Windows security modification
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:564
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Modifies firewall policy service
        • Windows security bypass
        • 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
        PID:1540
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2516

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    235KB

    MD5

    7e39b75cfb9bf100c278d836f195c976

    SHA1

    20371839ffc67e51c7098a559eb4e169eb7634d0

    SHA256

    fc7b749f4b9d3e0a4778fa7d9c1294fe692d6904d14d9583682c344d80594d2a

    SHA512

    88b4e8de71352a43ee31457955d7769dcd6926af3dfd4d857f44e4c8ad3df1da1e76bef4e66851dbc47be78bc1c4b4e1cca2b336e68a86e53ef605c18ca0a013

  • memory/564-62-0x0000000000660000-0x0000000000661000-memory.dmp

    Filesize

    4KB

  • memory/564-64-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/2516-65-0x0000000000E00000-0x0000000000E01000-memory.dmp

    Filesize

    4KB

  • memory/4804-0-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB

  • memory/4804-1-0x00000000023B0000-0x00000000023B1000-memory.dmp

    Filesize

    4KB

  • memory/4804-66-0x0000000000400000-0x00000000004B5000-memory.dmp

    Filesize

    724KB