Microsoft warns of new wave of Russian cyber attacks.

Microsoft's cybersecurity research and analysis team has reported that Russian hackers are preparing a new wave of cyber attacks against Ukraine, including a "ransomware-style" threat to organizations serving Ukraine's supply lines. The report found that a particularly sophisticated Russian hacking team, known as Sandworm, was testing "additional ransomware-style capabilities that could be used in destructive attacks on organizations outside Ukraine that serve key functions in Ukraine's supply lines." The findings come as Russia has been introducing new troops to the battlefield in eastern Ukraine.