WannaCry is clearly one of the top cybersecurity issues thus far in 2017. The combination of traditional ransomware with worm-like propagation capability rapidly spread the malware across the internet and throughout internal networks. The fact the virus could spread without human assistance materially increased the impact of the attack. But WannaCry and likely successor campaigns also changed the threat-level for industrial networks. We have referred to that in our blog, where we explored what happened, what made the attack unique, summarised the impact to ICS systems, and contemplated the changing threat landscape.