22-year old who helped stop WannaCry cyberattack

The young cyber security researcher known only by his Twitter handle @MalwareTechBlog, says he found a way of slowing the spread of WannaCry by chance (Photo: AFP)

They are called white hats -- the good guys in the Wild West of the internet -- and they ride to the rescue as in the case of the 22-year-old British expert who helped stop the WannaCry cyberattack.