A new form of peer-to-peer (P2P) malware has been discovered that sets a new bar for nastiness. Called FritzFrog, it has been found in various networks since the beginning of the year. Why is it so noteworthy? Several reasons: it is fileless, operates completely decentralized, was written from scratch, frequently updated and enhanced and hasn’t yet been claimed by any known threat actor. Let’s examine each of these points.