US blames North Korea for WannaCry cyber attack

The US has blamed North Korea for the rampant WannaCry ransomware that infected more than 200,000 victims in around 150 countries.

Businesses, schools and hospitals including the NHS were brought to their knees by the malicious software after it spread in May.

Tom Bossert, President Donald Trump’s security adviser said that the rogue Asian state was “directly responsible” for the malware that spread “indiscriminately”. He said that officials had investigated the matter and had evidence to suggest the attack came from North Korea.