A flaw in Petya – the current version, at least – has allowed an unidentified researcher to create a key generator to crack the encryption without paying 0.9 bitcoin to the criminals. BBC story: Petya ransomware encryption system cracked. Commentary by David Bisson for Graham Cluley’s blog: Infected by Petya ransomware? Use this tool to unlock your files… for nowThank goodness ransomware sometimes contains bugs too… And the website set up to help people with the generation: unfortunately, the average victim will have problems getting the information necessary to kickstart the process.
Confirmed by Lawrence Abrams of Bleeping Computer.