Petya ransomware encryption system cracked

Petya ransomware victims can now unlock infected computers without paying.

An unidentified programmer has produced a tool that exploits shortfalls in the way the malware encrypts a file that allows Windows to start up.

In notes put on code-sharing site Github, he said he had produced the key generator to help his father-in-law unlock his Petya-encrypted computer.

The malware, which started circulating in large numbers in March, demands a ransom of 0.9 bitcoins (£265).

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