General

  • Target

    JaffaCakes118_999637725d06c4657eabffc5618ff29b

  • Size

    484KB

  • Sample

    250331-peg81ssky5

  • MD5

    999637725d06c4657eabffc5618ff29b

  • SHA1

    535bb93da45bd4228d5dcf3e9cd79a08e43baa3e

  • SHA256

    142e1f0c627422eae07efbb5d5597b6d41c7bd63c27d0af92f8848904d852159

  • SHA512

    7cf6497c68654439872cc151149a6b01c9e9fcad8c2a31ec34823a18fab2842da27ce89321eb737c66db7bf573689fab625eec7394d36839c3fcffa6c0b5ce3e

  • SSDEEP

    12288:fgkDxdkL+6JNgKVcRa+fpHyWs3OBH4pU8tww:bxsKXa+hHyWseBg7Cw

Malware Config

Targets

    • Target

      JaffaCakes118_999637725d06c4657eabffc5618ff29b

    • Size

      484KB

    • MD5

      999637725d06c4657eabffc5618ff29b

    • SHA1

      535bb93da45bd4228d5dcf3e9cd79a08e43baa3e

    • SHA256

      142e1f0c627422eae07efbb5d5597b6d41c7bd63c27d0af92f8848904d852159

    • SHA512

      7cf6497c68654439872cc151149a6b01c9e9fcad8c2a31ec34823a18fab2842da27ce89321eb737c66db7bf573689fab625eec7394d36839c3fcffa6c0b5ce3e

    • SSDEEP

      12288:fgkDxdkL+6JNgKVcRa+fpHyWs3OBH4pU8tww:bxsKXa+hHyWseBg7Cw

    • Modifies WinLogon for persistence

    • Pykspa

      Pykspa is a worm spreads via Skype uses DGA and it's written in C++.

    • Pykspa family

    • Detect Pykspa worm

    • Adds policy Run key to start application

    • Blocklisted process makes network request

    • Disables RegEdit via registry modification

    • Checks computer location settings

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

    • Executes dropped EXE

    • Impair Defenses: Safe Mode Boot

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Hijack Execution Flow: Executable Installer File Permissions Weakness

      Possible Turn off User Account Control's privilege elevation for standard users.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops autorun.inf file

      Malware can abuse Windows Autorun to spread further via attached volumes.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks