In our continuation of the Stuxnet virus discussion, this lesson takes up where the last left off. We made you aware of what the Stuxnet virus does, how it manipulates data, and how that manipulated data gets to the HMI. In this lesson, we’re going to tell you what to look for in your code as well as show you how to determine if this virus has invaded your PLC. In order to find out if it has, we will make use of a tool that has been discussed in a previous lesson. Open up this lesson and do some virus scanning of your own.