General

  • Target

    https://github.com/LJ9859/Malware-Database/raw/refs/heads/main/Ransomware/Jigsaw.zip

  • Sample

    240919-1jfrjasarc

Malware Config

Targets

    • Target

      https://github.com/LJ9859/Malware-Database/raw/refs/heads/main/Ransomware/Jigsaw.zip

    • Jigsaw Ransomware

      Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.

    • Renames multiple (2025) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

MITRE ATT&CK Enterprise v15

Tasks