The Hidden Tear BruteForcer is a program created by Michael Gillespie that can be used to brute force the password for ransomware infections that are part of the Hidden Tear family of infections.  Using an encrypted PNG file, the decryptor can generate the decryption that can then be used to decrypt the rest of your files.

https://www.bleepingcomputer.com/download/hidden-tear-bruteforcer/