Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250217-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/02/2025, 16:28

General

  • Target

    JaffaCakes118_22a8ef9b714980ecc5a5710b2ed240b1.exe

  • Size

    285KB

  • MD5

    22a8ef9b714980ecc5a5710b2ed240b1

  • SHA1

    b6b2b713033c0d1ff58b5f245eaf1e8c9535acd4

  • SHA256

    f4722a009a957450c5ab056af2fbe537eb0a1b051ce82129af5d5b7f0c9899c1

  • SHA512

    ff33ce49178dc282735f50bfcfb750f349f9593367d549db0c138c5a27ac4e537f77c1678b316205285979d993c233a9cc712316b53b3553f5ef15cc1e84e594

  • SSDEEP

    6144:+D7cY2fgssM7Wirg9KXylmRiL+QMeC/i6isqX7UovnONztByipwxZLOxy:+l8E4w5huat7UovONzbXwn+y

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

192.168.178.24:1604

Mutex

DC_MUTEX-0QNYAHY

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    MvnLUP9hFAdD

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

rc4.plain

Signatures

  • Darkcomet

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

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies firewall policy service 3 TTPs 6 IoCs
  • Modifies security service 2 TTPs 2 IoCs
  • Windows security bypass 2 TTPs 4 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables Task Manager via registry modification
  • 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 1 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 6 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 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 59 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_22a8ef9b714980ecc5a5710b2ed240b1.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_22a8ef9b714980ecc5a5710b2ed240b1.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:4852
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_22a8ef9b714980ecc5a5710b2ed240b1.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2308
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_22a8ef9b714980ecc5a5710b2ed240b1.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:1416
    • 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:4632
      • 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:4740
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:1668
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies firewall policy service
      • Modifies security service
      • Windows security bypass
      • Disables RegEdit via registry modification
      • 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
      • System policy modification
      PID:2128
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Modifies firewall policy service
        • Modifies security service
        • Windows security bypass
        • Disables RegEdit via registry modification
        • 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:3408
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
          • System Location Discovery: System Language Discovery
          PID:696

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    285KB

    MD5

    22a8ef9b714980ecc5a5710b2ed240b1

    SHA1

    b6b2b713033c0d1ff58b5f245eaf1e8c9535acd4

    SHA256

    f4722a009a957450c5ab056af2fbe537eb0a1b051ce82129af5d5b7f0c9899c1

    SHA512

    ff33ce49178dc282735f50bfcfb750f349f9593367d549db0c138c5a27ac4e537f77c1678b316205285979d993c233a9cc712316b53b3553f5ef15cc1e84e594

  • memory/696-71-0x0000000000D00000-0x0000000000D01000-memory.dmp

    Filesize

    4KB

  • memory/1668-5-0x0000000000A30000-0x0000000000A31000-memory.dmp

    Filesize

    4KB

  • memory/2128-66-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/2128-69-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/3408-67-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/4852-0-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/4852-1-0x0000000000A90000-0x0000000000A91000-memory.dmp

    Filesize

    4KB

  • memory/4852-63-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB