Law enforcement agencies including the FBI and CISA have issued a warning about the ongoing threat of Medusa ransomware.

Federal authorities have issued an advisory warning people of Medusa ransomware that has breached the data of more than 300 people since February.

Medusa ransomware is dangerous enough that the FBI sent a 15-page memo warning people and entire industries. The agency says hundreds of victims have been reported and entire fields, from medicine to education and technology to manufacturing have been hit.