Federal authorities are warning users of Gmail, Outlook, and other popular email services about dangerous ransomware linked to a group of developers who have breached hundreds of victims' data, including people in the medical,

The FBI and U.S. Cybersecurity and Infrastructure Security Agency issued a joint cybersecurity advisory about Medusa ransomware activity that has claimed hundreds of victims from critical infrastructure sectors. Medical, education, legal, insurance, technology and manufacturing companies have all been victimized, CISA said.

Medusa ransomware now operates as a RaaS model, recruiting affiliates from criminal forums to launch attacks, encrypt data, and extort victims worldwide.