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Ransom:DOS/Petya.B


First posted on 29 June 2017.
Source: Microsoft

Aliases :

There are no other names known for Ransom:DOS/Petya.B.

Explanation :

This threat may be installed by malicious documents with embedded macro code and distributed via email. We have seen this threat installed by malicious documents detected as Trojan:O97M/Goldeneye.A.

Upon execution, this threat overwrites the Master Boot Record (MBR) with Ransom:DOS/Petya.A, and encrypts system drive sectors.

It then forces the PC to restart, after which you get the following message, which contains instructions to purchase a key to unlock the system.

Last update 29 June 2017

 

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