Two global, yet in many ways fairly minor, malware computer attacks in as many months are finally getting the message across: cyber security is serious.

The NotPetya attack in late June was derived from the same code as the previous month’s WannaCry ransomware attack, but was at first thought not to be as virulent. However, it soon became clear this was not ransomware, but malicious software — malware — designed to damage computer networks rather than extort funds.