Enlarge / This is the note that's left on computers infected by PetyaWrap. (credit: Eset) A new ransomware attack similar to last month's self-replicating WCry outbreak is sweeping the world with at least 80 large companies infected, reportedly including drug maker Merck, international shipping company Maersk, law firm DLA Piper, UK advertising firm WPP, and snack food maker Mondelez International. PetyaWrap, as the ransomware is called, uses the same potent National Security Agency exploit that allowed WCry to paralyze hospitals, shipping companies, and train stations in a matter of hours on May 12.