The WannaCry ransomware malware broke onto the world scene on Friday May 12, 2017 when it infected over 200,000 computers in more than 150 countries. Thankfully, the impact on critical infrastructure and manufacturing systems was relatively low. While WannaCry’s spread has been curtailed for now, new variants have been reported. This means that critical infrastructure operators and manufacturers need to take measures today to protect their Industrial Control Systems (ICS) from the WannaCry family of ransomware malware.