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 news briefing: https://thecyberwire.com/newsletters/daily-briefing/12/91 Selected reading. GRIT Ransomware Report: April 2023 (GuidePoint Security) DNSFilter State of Internet Security - Q1 2023 (DNSFilter) Identify vEdge Certificate Expired on May 9th 2023 (Cisco) The State of Ransomware Attacks in Education 2023: Trends and Solutions (Veriti) US Cyber Command 'Hunts Forward' in Latvia (Voice of America) US cyber team unearths malware during ‘hunt-forward’ mission in Latvia (C4ISRNET) Uncovering RedStinger - Undetected APT cyber operations in Eastern Europe since 2020 (Malwarebytes) Bad magic: new APT found in the area of Russo-Ukrainian conflict (Kaspersky)