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Analysis

  • max time kernel
    94s
  • max time network
    148s
  • 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, 18:31

General

  • Target

    JaffaCakes118_7b2c058c92c0bfcdc36f6eb6bcd0f66b.exe

  • Size

    797KB

  • MD5

    7b2c058c92c0bfcdc36f6eb6bcd0f66b

  • SHA1

    c7eb1f8c37df44d4f5560f1734dafdd12ed6477e

  • SHA256

    776d7d11b5d27b5b3a713f3839fd7128e05fa6a9134fa2fed9b2928e59852322

  • SHA512

    328816178c32125b73c01d03bd9670ae703e3a35c11c53e0ebbe43a9739b14ba2e77fa26be0cf215add3e2766035342253d668cb5b3f3012a172c18e60e8bec4

  • SSDEEP

    12288:QQLcijICEZ+6vFkqeXGvyxngsm/CEUCR264lGYxtFYB6dsqvPMySJR2SePaG1vhW:ZcfZxFTKn8/+CR26gGYxUYFvPMygGBW

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

imdaco.no-ip.org:1604

Mutex

DC_MUTEX-L9KM9Y7

Attributes
  • InstallPath

    MSDCS\Rundll32.exe

  • gencode

    LJp33LCadVtB

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    Rundll32

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.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • 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.

  • Suspicious use of AdjustPrivilegeToken 24 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b2c058c92c0bfcdc36f6eb6bcd0f66b.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b2c058c92c0bfcdc36f6eb6bcd0f66b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3852
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
      C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
      2⤵
      • Modifies WinLogon for persistence
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1732
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3164
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" +s +h
          4⤵
          • Sets file to hidden
          • Drops file in Windows directory
          • 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:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2140
        • 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
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:4132
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2160
      • C:\MSDCS\Rundll32.exe
        "C:\MSDCS\Rundll32.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:1412

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\MSDCS\Rundll32.exe

    Filesize

    78KB

    MD5

    2b9482eb5d3af71029277e18f6c656c0

    SHA1

    d594dc39c6e5f8fbd145d8970e096dc1d9b4a7f1

    SHA256

    1be7a63415f03400065f2beb2ca991c8b0b914bd41310cf9dd93c5e1fc0ed072

    SHA512

    46abaf2e57e498dd60352f76b484825eff7ebdd89cf512ba046d229d5d24a34e5f67c48a1d59551e0b49603a1ffee2ffbc124eef0042ddf3fe7fae423b4af0a8

  • memory/1732-3-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1732-4-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1732-6-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1732-7-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1732-8-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1732-48-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/2160-13-0x0000000000F90000-0x0000000000F91000-memory.dmp

    Filesize

    4KB

  • memory/3852-0-0x0000000074932000-0x0000000074933000-memory.dmp

    Filesize

    4KB

  • memory/3852-1-0x0000000074930000-0x0000000074EE1000-memory.dmp

    Filesize

    5.7MB

  • memory/3852-2-0x0000000074930000-0x0000000074EE1000-memory.dmp

    Filesize

    5.7MB

  • memory/3852-9-0x0000000074930000-0x0000000074EE1000-memory.dmp

    Filesize

    5.7MB