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A Twitter user by the name came up with the genetic algorithm to generate passwords and a security researcher at Emsisoft, created an executable designed to extract data from infected Petya drives. In April 2016, researchers developed a unique decryption tool that allowed most victims to generate a key to decrypt early Petya ransomware versions.
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The ransomware has demanded around $400 in Bitcoin for the decryption key. Petya is crypto-malware that is known for targeting a victim’s Master Boot Record instead of files stored on the computer, network shares or backups that the computer may have access to.
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It goes by various names such as Not Petya, ExPetr, Eternal Petya, and sometimes GoldenEye, Hasherezade said. Unlike previous versions, this version lacked the ability to decrypt effected systems and was considered wiper malware. That latest version of the malware, based on pirated GoldenEye code, was believed used in last month’s wiper outbreak that originated in the Ukraine. This year, the “compiled application” was stolen and modified by another threat actor. It was the fourth version based on the Petya code. “The published #Petya master key works for all versions including #GoldenEye,” tweeted Ivanov.Īccording to Hasherezade, GoldenEye ransomware was first created by Petya author Janus in 2016. “Similarly to the authors of TeslaCrypt, (Janus) released his private key, allowing all the victims of the previous Petya attacks, to get their files back,” wrote Hasherezade, a researcher for MalwareBytes that posted her finding on Thursday.įurther analysis of the master key by Kaspersky Lab research analyst Anton Ivanov confirmed the key unlocks Petya ransomware and early versions the GoldenEye ransomware. Russia, which was one of the countries hit, said the cyberattack caused no serious problems at either a state or corporate level in the country.The master key to the original version of the Petya ransomware – not to be confused with the latest and massive Petya/ExPetr outbreak that swept through the Ukraine and parts of Europe last month – has been released, allowing all the victims of previous Petya attacks to unscramble their encrypted files.Īccording to researchers, the author of the original Petya ransomware, which goes by the pseudonym Janus, made the key available on Wednesday. The impact on the business is still being assessed. It is now working on a "technical recovery plan". Maersk said that IT systems were down across multiple sites and some business units, but the issues have been contained. Many of the businesses under the WPP brand were affected but they are "experiencing no or minimal disruption." WPP said that it has taken steps to contain the attack with the priority now to return to normal operations. Some of those businesses responded on Wednesday. Major corporations have also been affected including WPP, Maersk, Russian oil giant Rosneft, and public and private institutions in Ukraine. According to security firm McAfee, the malware has spread across the U.S., large parts of Europe, South America, and big countries in Asia too. Microsoft estimates over 12,000 machines have been hit by the cyberattack.