BleepingComputer.com was one of the first support sites to have reports of the CryptorBit, or HowDecrypt, ransomware. At the time, this infection has been incredibly elusive and any supposed samples would not work. A technique has been found that can repair the file’s header and thus allow you to recover your corrupted files. This guide will continue to be updated as new information or approaches are gathered. If you have anything that you think should be added, clarified, or revised please let us know in the support topic linked to below.
Source: https://www.bleepingcomputer.com/virus-removal/cryptorbit-ransomware-information