https://www.bleepingcomputer.com/news/security/thanos-ransomware-adds-windows-mbr-locker-that-fails-every-time/

A new Thanos ransomware strain is trying and failing to deliver the ransom note onto compromised systems by overwriting the computers' Windows master boot record (MBR).

The new Windows MBR locker module has been discovered by security researchers at Palo Alto Networks' Unit 42 while analyzing two attacks were Thanos ransomware affiliates successfully encrypted devices of state-controlled organizations from the Middle East and North Africa during early July 2020.