Now hold on a second...
I thought the Russians did it using leaked NSA "security" tools?
https://www.forbes.com/sites/thomasbrewster/2017/04/26/shadow-brokers-leaked-nsa-cyber-tools-become-weapons-of-american-enemies/#1b6ba06b1924
Actually, nevermind. This whole thing stinks of a desire by the powers that be to start yet another war by bombing the North Koreans.