Federal agencies are warning Gmail and Outlook email users of a costly ransomware scheme that has already affected more than 300 victims. The FBI and the U.S. Cybersecurity and Infrastructure Security Agency issued the advisory, detailing a warning about the Medusa hacking organization, which has been active since 2021.

The FBI has issued a public warning urging users of webmail platforms, including Gmail, to enable two-factor authentication (2FA) to mitigate a growing ransomware threat.

The Medusa variant has carried out hundreds of attacks across industries, the FBI warns, along with CISA and MS-ISAC