The Most Devastating Cyber Attack In History: The Untold Story Of NotPetya

Petya is a family of encrypting ransomware that was first discovered in 2016. The malware targets Microsoft Windows-based systems, infecting the master boot record to execute a payload that encrypts a hard drive’s file system table and prevents Windows from booting. It subsequently demands that the user make a payment in Bitcoin to regain access to the system. Variants of Petya were first seen in March 2016, which propagated via infected e-mail attachments. In June 2017, a new variant of Petya was used for a global cyber attack, primarily targeting Ukraine. The new variant propagates via the EternalBlue exploit, which is generally believed to have been developed by the U.S. National Security Agency (NSA), and was used earlier in the year by the WannaCry ransomware. Kaspersky Lab referred to this new version as NotPetya to disambiguate it from the 2016 variants, due to these differences in operation. Also, although it purports to be ransomware, this variant was modified so that it is unable to revert its changes.

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https://www.wired.com/story/notpetya-cyberattack-ukraine-russia-code-crashed-the-world/