Eternal Blue refers to the evening of April 14, 2017, the hacker group Shadow Brokers publishes a large number of network attack tools, which contain "Eternal Blue" tools, "Eternal Blue" uses the SMB vulnerability of the Windows system. Get the highest permission of the system. On May 12, the criminals made Wannacry lesso viruses by transforming "Eternal Blue", UK,
Russia, the entire European and China's domestic school network, large enterprise intranet and government agency special network, and the high-ransom of rendering is credited to the recovery documents.
Well, I'm getting this a little wrong, but the Microsoft must have provided a lot of back doors to the FBI.