Security researchers have discovered a “vaccine” for the huge cyber-attack that hit organisations across the world on Tuesday 27 June 2017.
A perfc solution
But for those concerned about the attack there appears to be fix, albeit one with limited effectiveness.
By creating a read-only file – named perfc – and placing it within a computer’s “C:\Windows” folder, the attack will be stopped in its tracks.
An explanation of how to do this has been posted by security news website Bleeping Computer and has been backed up by several other security experts.
How to Enable the NotPetya/Petna/Petya Vaccine
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.
This batch file can be found at: https://download.bleepingcomputer.com/bats/nopetyavac.bat
