Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/07/2024, 14:36

General

  • Target

    6390b876f7a9236842427d1aa64c47cb_JaffaCakes118.exe

  • Size

    763KB

  • MD5

    6390b876f7a9236842427d1aa64c47cb

  • SHA1

    d5a728fb6f1e8339a61076d499d47d932df3fcf5

  • SHA256

    23ec9eebb57bc2df3edcc310629f9320fdd2d5f52026f07fe7a280abe77b57f2

  • SHA512

    bb7cfee5576c193c5147b7faae1e390db22a28b942ae4111f10994984bbd8713ce23e29ec93438aa9cd4f3bfe6504192892da5d84570ac203282b0fb7b6e6e8e

  • SSDEEP

    12288:ugmEDIvbiPjXLrhW1cKG8fz0hY2lglVCCeOWROCehzXLWgMC9R1Xv9WJhN41gpuv:ugmuITiPj/LKBb0C2ulVClRhozXLW1GT

Malware Config

Extracted

Family

darkcomet

Botnet

Matt

C2

yuk.no-ip.biz:100

Mutex

DC_MUTEX-BZJHQWP

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    ACd9Gmmlygjr

  • 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
  • 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
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 24 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6390b876f7a9236842427d1aa64c47cb_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\6390b876f7a9236842427d1aa64c47cb_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2844
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C ren C:\Users\Admin\AppData\Roaming\windowshostmanagerupdate windowshostmanagerupdate.exe && exit
      2⤵
        PID:5088
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
        2⤵
        • Modifies WinLogon for persistence
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4928
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe" +s +h
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1944
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe" +s +h
            4⤵
            • Sets file to hidden
            • Drops file in Windows directory
            • Views/modifies file attributes
            PID:4632
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1336
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
            4⤵
            • Sets file to hidden
            • Drops file in Windows directory
            • Views/modifies file attributes
            PID:3976
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
          3⤵
          • Executes dropped EXE
          PID:2600

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\windowshostmanagerupdate

      Filesize

      763KB

      MD5

      6390b876f7a9236842427d1aa64c47cb

      SHA1

      d5a728fb6f1e8339a61076d499d47d932df3fcf5

      SHA256

      23ec9eebb57bc2df3edcc310629f9320fdd2d5f52026f07fe7a280abe77b57f2

      SHA512

      bb7cfee5576c193c5147b7faae1e390db22a28b942ae4111f10994984bbd8713ce23e29ec93438aa9cd4f3bfe6504192892da5d84570ac203282b0fb7b6e6e8e

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

      Filesize

      34KB

      MD5

      e118330b4629b12368d91b9df6488be0

      SHA1

      ce90218c7e3b90df2a3409ec253048bb6472c2fd

      SHA256

      3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

      SHA512

      ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

    • memory/2844-0-0x0000000074782000-0x0000000074783000-memory.dmp

      Filesize

      4KB

    • memory/2844-1-0x0000000074780000-0x0000000074D31000-memory.dmp

      Filesize

      5.7MB

    • memory/2844-2-0x0000000074780000-0x0000000074D31000-memory.dmp

      Filesize

      5.7MB

    • memory/2844-12-0x0000000074780000-0x0000000074D31000-memory.dmp

      Filesize

      5.7MB

    • memory/4928-5-0x0000000000400000-0x00000000004CD000-memory.dmp

      Filesize

      820KB

    • memory/4928-8-0x0000000000400000-0x00000000004CD000-memory.dmp

      Filesize

      820KB

    • memory/4928-6-0x0000000000400000-0x00000000004CD000-memory.dmp

      Filesize

      820KB

    • memory/4928-9-0x0000000000400000-0x00000000004CD000-memory.dmp

      Filesize

      820KB

    • memory/4928-21-0x0000000000400000-0x00000000004CD000-memory.dmp

      Filesize

      820KB