Do you know what encryption method they are using? if its AES then there is Nothing you can do. other forms of encryption have some successful methods of attacking them. if its a legitimate piece of ransomware they probably did use AES. if not and the attackers were just lazy when writing the virus then they possibly could have just encoded the file with base64 or something and are trying to trick you. if this is the case the files can be easily recovered, if not then there is a problem. could you please send a sample of some of the text from one of the encrypted files. you can do this by opening it with notepad.