<sod >Marcus Hutchins, also known as MalwareTech, helped foil the WannaCry "ransomware" virus that hit more than 300,000 computers in 150 countries.< eod>< sod > Marcus Hutchins, also known as MalwareTech on social media, found a hidden Ã¢ÂÂkill switchÃ¢ÂÂÃÂ in the WannaCry ransomware virus that hit more than 300,000 computers in 150 countries.< eod>