The M4N1F3STO Virus screen locker is a Trojan that displays a picture of what is intended to be a hacker with the message that the victim’s files are being deleted unless bitcoins are sent to an enclosed bitcoin address. Once you enter the correct code, the screen will unlock and another screen will be displayed that contains text saying how the victim was tricked. This screenlocker can also easily be removed simply by reboot into safe mode and performing a security scan from there.
Source: https://www.bleepingcomputer.com/virus-removal/remove-M4N1F3STO-virus-screen-locker