Cyber whiz hailed 'accidental hero' after stopping global virus

The cyber specialist, known only as MalwareTech, registered a domain name that unexpectedly stopped the spread of the virus.

A British cyber whiz has been hailed an "accidental hero" after he stopped the spread of a global virus that brought chaos to networks around the world.

The anonymous IT expert became an international sensation after he prevented hundreds of thousands of computers from being infected by the ransomware that wreaked havoc across the British NHS.