North Korean state hackers seen using Medusa ransomware in attacks on US, Middle East

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North Korean Lazarus Group Targets US Healthcare with Medusa Ransomware Cybersecurity researchers have identified attacks utilizing Medusa ransomware, attributed to the Lazarus group, a North Korean state-backed hacking operation. These attacks are primarily targeting U.S. healthcare organizations, with the ransomware-as-a-service operation impacting over 300 organizations since its emergence in January 2021, and claiming at least 80 additional victims by February 2025. 20 sources 49