As Tanks Rolled Into Ukraine, So Did Malware. Then Microsoft Entered the War.

After years of talks about the need for public-private partnerships to combat cyberattacks, the war in Ukraine is stress-testing the system.

WASHINGTON — Last Wednesday, a few hours before Russian tanks began rolling into Ukraine, alarms went off inside Microsoft’s Threat Intelligence Center, warning of a never-before-seen piece of “wiper” malware that a…