The 2017 WannaCry attack had many disruptive effects across the world but the one that sticks in the minds of many security experts is the damage it did to the UK’s National Health Service (NHS).

In total, 81 NHS health trusts were affected by WannaCry ransomware, resulting in cancelled operations, thousands of missed appointments, and staff being locked out of computers.

For a period of hours to days, a significant part of one of the world’s largest heath systems, struggled to function.

A specific weakness was disruption to Magnetic Resonance Imaging (MRI) and Computed Tomography (CT) scanners which depended on Windows XP workstations prone to blue-screening when hit by WannaCry.

In the aftermath of WannaCry, a new Israeli study has concluded that it was no coincidence that Medical Imaging Devices (MIDs) caused problems.

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