The Trump administration has now officially blamed North Korea for the creation and spread of WannaCry, the cryptographic worm built on exploits stolen from the National Security Agency, that struck computers around the globe in May. White House National Security Advisor Tom Bossert made the assertion public in an op-ed published late Monday in The Wall Street Journal and in a press conference this morning. But there's little the US can actually do to North Korea in response.
"We do not make this allegation lightly," Bossert said. "It is based on evidence. We are not alone with our findings, either. Other governments and private companies agree. The United Kingdom attributes the attack to North Korea, and Microsoft traced the attack to cyber affiliates of the North Korean government."
The attribution is not a surprise. Security industry researchers and analysts for other governments (including the United Kingdom's GCHQ and Canada's Communications Security Establishment) have pointed the finger at North Korea as the most likely source of the attack for months. But Bossert told reporters that the White House wanted to be extremely careful before making a public attribution.