According to Tom Bossert, White House Homeland Security Adviser, Microsoft and Facebook helped to disable a number of North Korean cyber actions. The US blamed Pyongyang for Wannacry attack that crippled hospitals, banks and other companies.
The attack was widespread and cost billions, and North Korea is directly responsible. North Korea has acted especially badly, largely unchecked, for more than a decade, and its malicious behavior is growing more egregious. WannaCry was indiscriminately reckless.
– Tom (Wall Street Journal)
The US along with United Kingdom, Australia, Canada, New Zealand and Japan have announced that an elite group of hackers who go by the name “Lazarus Group” in working in behalf of North Korean Government and were responsible for the Wannacry attack that crippled the computer infrastructure in more than 150 countries. The government also believes that the group was behind the 2014 hack of Sony Pictures Entertainment that destroyed files, leaked corporate communications online and led to the departure of several top studio executives. These acquisitions, if true are really worrying considering the tension between North Korea and the USA.
For now, Tom has assured that the USA is seeking help from all the companies to join together and help in Cyber Security Defense.
Source: Microsoft Blog