A vaccination for Petya



  • Worth reading, might even be worth doing if you have any extra concerns.

    A vaccine of sorts for the newest Ransomware.



  • @DustinB3403 Thanks! Already applying via GPO



  • Here is a batch file for anyone who wants to do this "lazily"

    @echo off
    REM Vaccince for NotPetya/Petya/Petna/SortaPetya.
    
    
    echo Administrative permissions required. Detecting permissions...
    echo.
    		
    net session >nul 2>&1
    
    if %errorLevel% == 0 (
    	if exist C:\Windows\perfc (
    		echo Computer already vaccinated for NotPetya/Petya/Petna/SortaPetya.
    		echo.
    	) else (
    		echo This is a NotPetya/Petya/Petna/SortaPetya Vaccination file. Do not remove as it protects you from being encrypted by Petya. > C:\Windows\perfc
    				echo This is a NotPetya/Petya/Petna/SortaPetya Vaccination file. Do not remove as it protects you from being encrypted by Petya. > C:\Windows\perfc.dll
    				echo This is a NotPetya/Petya/Petna/SortaPetya Vaccination file. Do not remove as it protects you from being encrypted by Petya. > C:\Windows\perfc.dat
    
    		attrib +R C:\Windows\perfc
    		attrib +R C:\Windows\perfc.dll
    		attrib +R C:\Windows\perfc.dat
    
    		echo Computer vaccinated for current version of NotPetya/Petya/Petna/SortaPetya.
    		echo.
    	)
    ) else (
    	echo Failure: You must run this batch file as Administrator.
    )
      
    pause

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