Rezm file extension .Rezm file extension is an extension that is used by the latest variant of STOP ransomware. ‘Rezm’ variant is very similar in its characteristics to other variants of this ransomware. It also encrypts files, and then renames them, giving them a new filename consisting of their old and ‘.rezm’ appended at the … Continue reading .Rezm file extension. Remove Rezm virus. Restore, Decrypt .rezm files.