North Korea carried out the WannaCry ransomware attack, say security services

British security services believe that last month’s global WannaCry ransomware attack was launched by hackers in North Korea, sources familiar with the matter have said. The WannaCry ransomware outbreak – powered by a leaked-NSA exploit – took down Windows computers around the world, infecting over 300,000 PCs and crippling systems across the Americas, Europe, Russia and China.

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