Emsisoft Decryptor for STOP Djvu
The STOP Djvu ransomware encrypts victim's files with Salsa20, and appends one of dozens of extensions to filenames; for example, ".djvu", ".rumba", ".radman", ".gero", etc.
Please note: There are limitations on what files can be decrypted. more
Of course, put all the safeguards in place first so you won't need this tool. ~Kevin