Clop created custom web shell for Windchill data theft attacks
A custom Java web shell likely linked to the Clop ransomware gang was designed specifically for PTC Windchill and FlexPLM servers, with built-in features to decrypt credentials, enumerate file repositories, and steal files. [...]
https://www.bleepingcomputer.com/news/security/clop-created-custom-web-shell-for-windchill-data-theft-attacks/