Finding your files appended with the extension is a clear indicator that your system has been compromised by a variant of the STOP/Djvu ransomware family . This specific malware encrypts personal data and demands payment for a decryption key.
Paying funds criminal enterprises and does not guarantee file recovery. xcbg decrypt
, it is likely an offline key, and decryption is much more probable. Try Official Decryptors: No More Ransom Project or use tools from Do you have your Personal ID from the ransom note? Finding your files appended with the extension is