The US FBI warns of the spread of the Akira ransomware, which has affected more than 250 companies worldwide.
Hackers using VPNs hack into corporate systems, steal data and demand ransom in Bitcoins. More than $42 mln is already known to have been stolen.
They initially targeted Windows systems, but now a Linux version of the malware has emerged.
Private users and companies are advised to strengthen security measures: make backups, use multi-factor authentication and encrypt data.
