Here's a free decrypter for some variants of STOP #Ransomware. Only works for extensions ".puma", ".pumas", and ".pumax". Requires encrypted and original file pair > ~150KB. Thanks to @AfshinZlfgh for PoC. Link: https://t.co/oJSb9hkWdh pic.twitter.com/S1Gpz8jPuT

— Michael Gillespie (@demonslay335) November 30, 2018