The FBI and the U.S. Cybersecurity and Infrastructure Security Agency are urging users of popular email services like Gmail and Outlook to be on the lookout for a dangerous and potentially costly ransomware scheme. A bulletin released this week detailed a warning for the Medusa ransomware gang, a group that’s been active since 2021.

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

Medusa demands a ransom payment of thousands alongside a threat of releasing embarrassing information to the public.