Ransomware and social engineering trends. Expired certificate addressed. Ransomware groups target schools. Cyber updates in the hybrid war.

A Ransomware report highlights targeting and classification. Phishing remains a major threat. Cisco addresses an expired certificate issue. LockBit and Medusa hit school districts with ransomware. US and Canadian cyber units wrap up a hunt-forward mission in Latvia. Ben Yelin on NYPD surveillance. Our CyberWire producer Liz Irvin interviews Damien Lewke, a graduate student at MIT. And an unknown threat actor is collecting against both Russia and Ukraine.

For links to all of today's stories check out our CyberWire daily …

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