Detailed article on the attack on A.P. Møller-Maersk.

In the spring of 2017, unbeknownst to anyone at Linkos Group, Russian military hackers hijacked the company’s update servers to allow them a hidden back door into the thousands of PCs around the country and the world that have M.E.Doc installed. Then, in June 2017, the saboteurs used that back door to release a piece of malware called #NotPetya, their most vicious cyberweapon yet.
https://www.wired.com/story/notpetya...shed-the-world