A malware distributor has decided to play a nasty prank by locking victim’s computers before they can start Windows. Victims are locked out of their computer before Windows starts. The infection is called MBRLockers as they replace the’master boot record’ of a computer so that it prevents the operating system from starting and displays a ransom note or other message instead. Victims can try to repair the MBR with Microsoft’s bootrec /fixmbr and /fixboot. Another variant calling itself “SentinelOne Labs Ransomware”” is being distributed targets only Vitali Kremez.”
Source: https://www.bleepingcomputer.com/news/security/new-wiper-malware-impersonates-security-researchers-as-prank/