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General

  • Target

    JaffaCakes118_71fe7001a5a0173586e57724323086f9

  • Size

    763KB

  • Sample

    250313-y4r9ys11hx

  • MD5

    71fe7001a5a0173586e57724323086f9

  • SHA1

    95b565cc9b543e4b839afb61d28f395b2caa3901

  • SHA256

    b342f8987e50c0b71382b1ca6b162b77b94a7415e1cfab565f902018d6a992e0

  • SHA512

    fc0190766a15c455f1fb08f5c039c9a5ccb7f88e4d105531526e6389f73b28f55ce915551eb7a49f3138f26141307c3ce387fa89e3c0ca3a7c7941199564f007

  • SSDEEP

    12288:h4dMRU/UP4heFjLDFtvoSZuUXZRY49SA7GI/p7a6o2Mhi9dl7Lue1VQbhUVzoWCC:qwU/UwhWvBXZpSRSJo2xL7TA7QV

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

108.34.128.228:81

Mutex

DC_MUTEX-F54S21D

Attributes
  • InstallPath

    Windupdt\winupdate.exe

  • gencode

    6-N5MZ9h6NWr

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    winupdater

rc4.plain

Targets

    • Target

      JaffaCakes118_71fe7001a5a0173586e57724323086f9

    • Size

      763KB

    • MD5

      71fe7001a5a0173586e57724323086f9

    • SHA1

      95b565cc9b543e4b839afb61d28f395b2caa3901

    • SHA256

      b342f8987e50c0b71382b1ca6b162b77b94a7415e1cfab565f902018d6a992e0

    • SHA512

      fc0190766a15c455f1fb08f5c039c9a5ccb7f88e4d105531526e6389f73b28f55ce915551eb7a49f3138f26141307c3ce387fa89e3c0ca3a7c7941199564f007

    • SSDEEP

      12288:h4dMRU/UP4heFjLDFtvoSZuUXZRY49SA7GI/p7a6o2Mhi9dl7Lue1VQbhUVzoWCC:qwU/UwhWvBXZpSRSJo2xL7TA7QV

    • Darkcomet

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

    • Darkcomet family

    • Modifies WinLogon for persistence

    • Modifies firewall policy service

    • Modifies security service

    • Windows security bypass

    • Disables RegEdit via registry modification

    • Disables Task Manager via registry modification

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Windows security modification

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

    • UPX packed file

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

MITRE ATT&CK Enterprise v15

Tasks