Kaspersky has released a decryptor for the Fonix Ransomware (XONIF) that allows victims to recover their encrypted files for free. The key is valid and could be used to decrypt a victim’s files. The FONix ransomware admin told BleepingComputer that they had encrypted approximately 5,000 to 6,000 systems throughout its operation. The decryptor can be downloaded to a device with encrypted files and start to decrypt your files. After you have decrypted your files and determined that they are opening correctly, you can delete the leftover encrypted files.
Source: https://www.bleepingcomputer.com/news/security/new-fonix-ransomware-decryptor-can-recover-victims-files-for-free/