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,

Cyber security officials are warning email users against a ransomware scheme. The ransomware-as-a-service software called Medusa has been used to conduct ransomware attacks since 2021 via phishing methods. Falling victim to a phishing scam can result in financial theft.

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.