This post shows you how to use the special decryptor for the petya family: Petya, Msicha, and Goldeneye. Not suitable for copycats of these.
Pirated versions of DMA-locker are doing the rounds, but there is some good news. All the encrypted data can be decrypted with the same key and we can give it to you.
A decryptor (Wanakiwi) that has been developed for WannaCry/WannaCrypt/wCrypt. There is a catch though, it only works for some operating systems.