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Over 500 Critical Infrastructure Organizations Hit by Medusa Ransomware

FBI warns Medusa ransomware-as-a-service has hit over 500 critical infrastructure organizations while significantly improving its tactics, techniques and procedures.

The FBI warned that the Medusa ransomware-as-a-service operation has compromised more than 500 critical infrastructure organizations. The agency said the group has significantly enhanced its tactics, techniques and procedures, making it harder for defenders to counter. Defenders in critical infrastructure sectors should review exposure and harden against Medusa's updated TTPs.

Infosecurity Magazine · 29d agoRansomware in the wild

Gunra Ransomware Exploits Fortinet Flaws to Target Critical Infrastructure

US and Korean agencies warn Gunra ransomware actors exploit Fortinet flaws and stealthily exfiltrate large data volumes, targeting critical infrastructure.

US and Korean authorities warned that Gunra ransomware actors exploit Fortinet vulnerabilities to gain access and use stealthy techniques to exfiltrate vast volumes of data, including from Microsoft services. The group is targeting critical infrastructure organizations. Defenders should prioritize Fortinet patching and watch for large, quiet data egress.

Infosecurity Magazine · Aug 12, 2026Ransomware in the wild