The tools to hack the company are well known and in the public domain. The company, Sony, had lousy internal network security and had been hacked before. The hackers probably had some inside knowledge. They used servers in Bolivia, China and South Korea to infiltrate. There is zero public evidence in the known that the hack was state sponsored.
But the U.S. is claiming that the event is a "national security matter". Who's national security? Japan's? Canada's? Why? A private Japanese entertainment(!) company left the doors open and had some equipment vandalized and some of its private property stolen. Why, again, is that of U.S. "national interest"? Why would the U.S. even consider some "proportional response"?
Comment: Maybe it has something to do with this:
At the same time, though, Obama said the attack should serve as a wake-up call to Congress and prompt lawmakers in Washington, DC to get serious about implementing cybersecurity legislation in the wake of what is only the latest hack to be endured by a major American company.
The White House is anonymously accusing the state of North Korea of having done the hack. It provides no evidence to support that claim and the government of North Korea denied any involvement. The FBI and Sony say they have no evidence for such a claim.
Still the New York Times editors eat it all up:
North Korean hackers, seeking revenge for the movie, stole millions of documents, including emails, health records and financial information that they dished out to the world.















Comment: After stating that the U.S. government has no evidence to implicate North Korea in the hacking, the following New York Times article would admit that the NSA has been trying to hack and infiltrate North Korea's computer network for years. And if that wasn't enough the U.S. government is considering relisting North Korea as a state sponsor of terrorism. Double standards and exceptionalism at work.