A new version of the venerable GpCode ransomware attack is making the rounds right now, demanding payments of $120 in order to decrypt files on infected PCs. This version, which has been active for several days now, is different from previous variants in that it overwrites the original files, preventing recovery of the data. The new malware encrypts the original file, making data recovery much more difficult, if not impossible, according to security researchers who have seen the new malware. Researchers have found some methods for recovering data compromised in these attacks, but the newest variant seems to eliminate that possibility.
Source: https://threatpost.com/new-gpcode-variant-demanding-cash-decryption-key-112910/74711/