You’ve probably heard all the fuss about Petya the ransomware heavily covered in the main stream press recently. 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.
However, while this method is effective, it only protects the individual computer the perfc file is placed on. Researchers have so far been unable to locate a kill switch that would disable the ransomware attack entirely.