This represents a serious escalation in ransomware techniques. While users can still run security tools to clean their systems of traditional ransomware applications and even recover some files, if Windows doesn't start at all, like in this case, the remediation procedure becomes much more difficult.
Repairing the MBR is no trivial matter and usually requires booting from the Windows installation disk, getting into the recovery command console and typing special commands.
Ransomware infections are typically more common throughout Eastern Europe and South America, but this type of malware is slowly gaining traction in other regions of the world as well. Some variants that impersonate law enforcement agencies and ask victims to pay fictitious fines have recently been detected in Western Europe.
"Though overshadowed by other more newsworthy threats, ransomware attacks are definitely not out of picture. In fact, this threat appears to be flourishing, as evidenced by the growth of ransomware infections in other parts of Europe," Pantanilla said.