Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-01-2025 03:11

General

  • Target

    JaffaCakes118_77450408bd213a02cde73938a9637ac5.exe

  • Size

    30.5MB

  • MD5

    77450408bd213a02cde73938a9637ac5

  • SHA1

    42646441beb6ffd2b32e5bbe6421af1c03c50e24

  • SHA256

    3b92f81a930e9ec017e3cab0afeb1314570390f7ec19ba94a5be367eb91e4b83

  • SHA512

    d212daa81277715a478726d1de8ebe1b2b7cfc610629a67e343b84f6e7df7b98529e4832c43845b89f76034e7f8f0ae1595ced4b24667f23e79f93b81a680d5c

  • SSDEEP

    24576:bkFoef0wlYuX9D/rJ1RnfjNQfyvL0SpUVPENdOYHSSSSQoS:YFoi0wlYc9zhifyT05VPElg

Malware Config

Extracted

Family

darkcomet

Botnet

spread 1.7.04

C2

grunz.no-ip.biz:1604

Mutex

DC_MUTEX-VLMMDM0

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    h6v8dGU4NPvm

  • install

    true

  • offline_keylogger

    true

  • password

    hub

  • persistence

    true

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 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.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 12 IoCs

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

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77450408bd213a02cde73938a9637ac5.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77450408bd213a02cde73938a9637ac5.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:5080
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77450408bd213a02cde73938a9637ac5.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77450408bd213a02cde73938a9637ac5.exe"
      2⤵
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2556
      • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77450408bd213a02cde73938a9637ac5.exe
        "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77450408bd213a02cde73938a9637ac5.exe"
        3⤵
        • Modifies WinLogon for persistence
        • Checks computer location settings
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2780
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77450408bd213a02cde73938a9637ac5.exe" +s +h
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2396
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77450408bd213a02cde73938a9637ac5.exe" +s +h
            5⤵
            • Sets file to hidden
            • System Location Discovery: System Language Discovery
            • Views/modifies file attributes
            PID:4856
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:5100
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
            5⤵
            • Sets file to hidden
            • System Location Discovery: System Language Discovery
            • Views/modifies file attributes
            PID:3900
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
          • Deletes itself
          • System Location Discovery: System Language Discovery
          PID:3668
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4644
          • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
            "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
            5⤵
            • Executes dropped EXE
            • Writes to the Master Boot Record (MBR)
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:3616
            • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
              "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
              6⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              PID:3196
              • C:\Windows\SysWOW64\notepad.exe
                notepad
                7⤵
                • System Location Discovery: System Language Discovery
                PID:4060

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    30.5MB

    MD5

    77450408bd213a02cde73938a9637ac5

    SHA1

    42646441beb6ffd2b32e5bbe6421af1c03c50e24

    SHA256

    3b92f81a930e9ec017e3cab0afeb1314570390f7ec19ba94a5be367eb91e4b83

    SHA512

    d212daa81277715a478726d1de8ebe1b2b7cfc610629a67e343b84f6e7df7b98529e4832c43845b89f76034e7f8f0ae1595ced4b24667f23e79f93b81a680d5c

  • memory/2556-5-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/2556-11-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/2556-2-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/2780-30-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/2780-8-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/2780-9-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/2780-10-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/2780-13-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/2780-14-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-54-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-51-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-41-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-61-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-44-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-45-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-48-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-47-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-60-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-49-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-50-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-59-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-52-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-53-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-58-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-55-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-56-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3196-57-0x0000000000400000-0x00000000004BD000-memory.dmp

    Filesize

    756KB

  • memory/3616-36-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/3616-42-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/3668-17-0x0000000000DE0000-0x0000000000DE1000-memory.dmp

    Filesize

    4KB

  • memory/4060-46-0x00000000008A0000-0x00000000008A1000-memory.dmp

    Filesize

    4KB