Vaccine, not Killswitch, Found for Petya (NotPetya) Ransomware Outbreak

I used the BAT file recommended in the article. Took two seconds. Worked perfectly. You do have to run it from a command line with Admin privileges. 

Cybereason security researcher Amit Serper has found a way to prevent the Petya (NotPetya/SortaPetya/Petna) ransomware from infecting computers.

The ransomware has been wreaking havoc across the globe today, locking hard drive MFT and MBR sections and preventing computers from booting. Unless victims opted to pay a ransom (which is now pointless and not recommended), there was no way to recover their systems.

To vaccinate your computer so that you are unable to get infected with the current strain of NotPetya/Petya/Petna (yeah, this naming is annoying), simply create a file called perfc in the C:\Windows folder and make it read only. For those who want a quick and easy way to perform this task, Lawrence Abrams has created a batch file that performs this step for you.

Please note that he batch file will also create two addition vaccination files called perfc.dat and perfc.dll. While my tests did not indicate that these additional files are needed, I added them for thoroughness based on the replies to this tweet.

This batch file can be found at: https://download.bleepingcomputer.com/bats/nopetyavac.bat 

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