A new ransomware has been discovered that installs DiskCryptor on the infected computer and reboots your computer. On reboot, victims will be greeted with a custom ransom note that explains that their disk has been encrypted and how to pay the ransom. […]

from https://www.bleepingcomputer.com/news/security/new-ransomware-using-diskcryptor-with-custom-ransom-message/