Gpcode.ak encrypts popular extensions using an RSA encryption algorithm with a 1024-bit key. The only way to currently decrypt the encrypted files is to use the private key, which only the author has, and which is available for a fee. Kaspersky so far has been unable to decrypt files encrypted by the virus, since the key is 1024 bits long. The company is offering to help recover files for users who have been infected with the virus. The best measure to fight this kind of malware is to regularly create backups.”]
Source: https://www.darkreading.com/analytics/new-virus-lets-attackers-hold-data-for-ransom