Today, MalwareHunterTeam discovered a new variant of the CryptoMix ransomware that is appending the .EMPTY extension to encrypted file names. Considering that the previous variant used ERROR as the previous extension and now uses EMPTY, it is clear that the developers are running out of extensions to use. […]

from https://www.bleepingcomputer.com/news/security/new-empty-cryptomix-ransomware-variant-released/