A few weeks ago, I received an email from a user asking about antivirus protection for SCADA systems. Now I think antivirus is an essential tool for ICS and SCADA systems. However, this is what he wrote:
My security supplier tells me that attacks from Stuxnet (and next-Stuxnet like worms) can be avoided by protecting WinCC computers using an antivirus product. This will make the PLC perfectly safe, they tell me.