Analysis

  • max time kernel
    133s
  • max time network
    103s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-06-2024 16:38

General

  • Target

    16b8315c6de1994bdcbc0faf574a162b_JaffaCakes118.exe

  • Size

    300KB

  • MD5

    16b8315c6de1994bdcbc0faf574a162b

  • SHA1

    38c2018b835dcc8dd6e6c156f7619c8e0acc493d

  • SHA256

    018556978f8a8e862bb57db11a55e0be62b424db127b66cd77451fe970b30ee0

  • SHA512

    85f5c29486979cb3480fbfa9ab302a29463b060b12dc3aa95785037cfdc2b7f917492f8a1f3a7043d80ef09dca38b908b0f4423907f31148b8c554323fdca4f2

  • SSDEEP

    6144:63EriZWNoVdGEu3j1LdH+gYOFtDD02M14rqM:8EWdGn3jzH+ca5M

Malware Config

Extracted

Family

darkcomet

Botnet

User

C2

97.81.46.17:1604

socksproxy1.serveftp.com:1604

Mutex

DC_MUTEX-R0MQYLT

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    SkFtw2Fer8G2

  • 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 2 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 3 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 behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 25 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\16b8315c6de1994bdcbc0faf574a162b_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\16b8315c6de1994bdcbc0faf574a162b_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3588
    • C:\Users\Admin\AppData\Roaming\msconfig.exe
      "C:\Users\Admin\AppData\Roaming\msconfig.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3024
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        3⤵
        • Modifies WinLogon for persistence
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3004
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2176
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
            5⤵
            • Sets file to hidden
            • Drops file in Windows directory
            • Views/modifies file attributes
            PID:2044
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3268
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
            5⤵
            • Sets file to hidden
            • Drops file in Windows directory
            • Views/modifies file attributes
            PID:4668
        • C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
          "C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"
          4⤵
          • Executes dropped EXE
          PID:1328

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    1.1MB

    MD5

    d881de17aa8f2e2c08cbb7b265f928f9

    SHA1

    08936aebc87decf0af6e8eada191062b5e65ac2a

    SHA256

    b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

    SHA512

    5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

  • C:\Users\Admin\AppData\Roaming\msconfig.exe

    Filesize

    300KB

    MD5

    16b8315c6de1994bdcbc0faf574a162b

    SHA1

    38c2018b835dcc8dd6e6c156f7619c8e0acc493d

    SHA256

    018556978f8a8e862bb57db11a55e0be62b424db127b66cd77451fe970b30ee0

    SHA512

    85f5c29486979cb3480fbfa9ab302a29463b060b12dc3aa95785037cfdc2b7f917492f8a1f3a7043d80ef09dca38b908b0f4423907f31148b8c554323fdca4f2

  • memory/3004-24-0x0000000000400000-0x00000000004B9000-memory.dmp

    Filesize

    740KB

  • memory/3004-20-0x0000000000400000-0x00000000004B9000-memory.dmp

    Filesize

    740KB

  • memory/3004-22-0x0000000000400000-0x00000000004B9000-memory.dmp

    Filesize

    740KB

  • memory/3004-23-0x0000000000400000-0x00000000004B9000-memory.dmp

    Filesize

    740KB

  • memory/3004-19-0x0000000000400000-0x00000000004B9000-memory.dmp

    Filesize

    740KB

  • memory/3004-34-0x0000000000400000-0x00000000004B9000-memory.dmp

    Filesize

    740KB

  • memory/3024-16-0x0000000074A60000-0x0000000075011000-memory.dmp

    Filesize

    5.7MB

  • memory/3024-17-0x0000000074A60000-0x0000000075011000-memory.dmp

    Filesize

    5.7MB

  • memory/3024-39-0x0000000074A60000-0x0000000075011000-memory.dmp

    Filesize

    5.7MB

  • memory/3588-2-0x0000000074A60000-0x0000000075011000-memory.dmp

    Filesize

    5.7MB

  • memory/3588-15-0x0000000074A60000-0x0000000075011000-memory.dmp

    Filesize

    5.7MB

  • memory/3588-0-0x0000000074A62000-0x0000000074A63000-memory.dmp

    Filesize

    4KB

  • memory/3588-1-0x0000000074A60000-0x0000000075011000-memory.dmp

    Filesize

    5.7MB