Auteur Sujet: [BC] Petya Ransomware's Encryption Defeated and Password Generator Released  (Lu 694 fois)

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Une fiche BleepingComputer sur le ransomware Petya

Petya Ransomware's Encryption Defeated and Password Generator Released

An individual going by the twitter handle leostone was able to create an algorithm that can generate the password used to decrypt a Petya encrypted computer. In my test this, this algorithm was able to generate my key in 7 seconds.

The solution used to generate this key is called a genetic algorithm and is one that that mimics the evolutionary process in order to solve problems.  According to MathWorks:

    A genetic algorithm (GA) is a method for solving both constrained and unconstrained optimization problems based on a natural selection process that mimics biological evolution. The algorithm repeatedly modifies a population of individual solutions. At each step, the genetic algorithm randomly selects individuals from the current population and uses them as parents to produce the children for the next generation. Over successive generations, the population "evolves" toward an optimal solution.

Leostone has setup a web site (you can use this site if the other one is down) that a victim can use to generate the key once they provide some information from the infected drive. Below are instructions on how to retrieve the required information so you can use leostone's site to generate your decryption key.