Dr. Lidiia Podkopaieva was about to click "send" on an order of new surgical instruments when her computer monitor suddenly went dark.
She speed-dialed the clinic's technician but didn't even have time to tell him what was wrong.
"We're under cyberattack," he told her. "Switch off the computer immediately."
The call would kick off a "crazy week" as Podkopaieva and her staff struggled with the sudden loss of half the computers at the Left Bank Pediatric Clinic in Kiev, where she serves as medical director. The central phone system collapsed, digital appointments vanished and diagnostic machines dropped offline, interrupting at...