General

  • Target

    JaffaCakes118_9573b06e5dbcb0a2dac71b4ba63da8dc

  • Size

    500KB

  • Sample

    250329-yenkgatzgy

  • MD5

    9573b06e5dbcb0a2dac71b4ba63da8dc

  • SHA1

    457ea5edcfea4b67c47fdd8eed27e9bfbd6e970a

  • SHA256

    a2c7d8f49e2a4d74df79df52b5a7aa0eb0ea546383ae020cc6e104d97aa8c216

  • SHA512

    c91368e11cb992c86ffd4595ae41a80c024f8e3d921f68be30ec78335ed41b97f5b3da4d3b337aa12dd04e38fbf5262500b16ecb9028ecde3827f2fa02618458

  • SSDEEP

    6144:kj6/wndfF/gl0LQIk8DR3dEuAI7pEfxsZozAm9TMdGQLUg1nYmefPImdrionj7E4:u6onxOp8FySpE5zvIdtU+Ymef

Malware Config

Targets

    • Target

      JaffaCakes118_9573b06e5dbcb0a2dac71b4ba63da8dc

    • Size

      500KB

    • MD5

      9573b06e5dbcb0a2dac71b4ba63da8dc

    • SHA1

      457ea5edcfea4b67c47fdd8eed27e9bfbd6e970a

    • SHA256

      a2c7d8f49e2a4d74df79df52b5a7aa0eb0ea546383ae020cc6e104d97aa8c216

    • SHA512

      c91368e11cb992c86ffd4595ae41a80c024f8e3d921f68be30ec78335ed41b97f5b3da4d3b337aa12dd04e38fbf5262500b16ecb9028ecde3827f2fa02618458

    • SSDEEP

      6144:kj6/wndfF/gl0LQIk8DR3dEuAI7pEfxsZozAm9TMdGQLUg1nYmefPImdrionj7E4:u6onxOp8FySpE5zvIdtU+Ymef

    • 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

    • 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