A fake decryptor for the STOP Djvu Ransomware is being distributed that lures already desperate people with the promise of free decryption. Instead of getting their files back for free, they are infected with another ransomware that makes their situation even worse. Fake decryptor does not recover any files for free but instead encrypts all of the victim’s already encrypted data with another. Fake encryptor was initially found by MalwareHunterTeam but has now been analyzed and users should not pay the ransom until it is confirmed no weakness can be used.
Source: https://www.bleepingcomputer.com/news/security/fake-ransomware-decryptor-double-encrypts-desperate-victims-files/