Blog
Cephalus ransomware: What you need to know
By Graham Cluley on Wed, 08/27/2025
What is Cephalus?Cephalus is a relatively new ransomware operation that emerged in mid-2025, and has already been linked to a wave of high-profile data leaks. Like many other ransomware attacks, Cephalus not only encrypts but also steals sensitive data - with victims named-and-shamed on a dedicated leak site hosted on the dark web.Where does it get the name Cephalus from?Cephalus is a character...