Petya and NotPetya were two versions of the same basic ransomware, and hit the world in 2016 and 2017. They are both encrypting types of ransomware, and substantially raised the profile of these types of attacks when they were unleashed. One of NotPetya’s distinguishing features is that it is commonly believed to have originated as a state-sponsored Russian cyberattack. NotPetya is also generally understood to be much more dangerous than Petya.
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