“Facebook took down accounts that stopped the operational execution of ongoing cyber attacks and Microsoft acted to patch existing attacks, not just the WannaCry attack initially,” White House homeland security adviser Tom Bossert said on Tuesday.
Bossert did not provide details on the actions by the two American tech heavyweights but said the U.S. government was calling on other companies to cooperate in cyber security defense.
Bossert’s remarks came during a White House news conference in which he blamed Pyongyang for the WannaCry attack that infected hundreds of thousands of computers in more than 150 countries, saying the U.S. government had clear evidence that North Korea was responsible. He did not share that evidence.