Locky is a Windows ransomware infection that was released in February 2016. The infection will affect all versions of Windows, including Windows XP, Windows Vista, Windows 7, Windows 8, and Windows 10. When a victim is infected they will have their files encrypted and then a ransom of about.5 bitcoins will be demanded in order to receive the decryption key. There is an active Locky support topic that contains discussion and the experiences of IT consultants, end users, and companies who have been affected by this ransomware program.
Source: https://www.bleepingcomputer.com/virus-removal/locky-ransomware-information-help