Another day, another hack of Microsoft technology. Ho-hum, you might think, this has happened before and will happen again — as surely as the sun rises in the morning and sets at night. This time is different. Because this time the targets weren’t Microsoft customers, but rather the top echelons of Microsoft itself. And the hacker group, called Midnight Blizzard, or sometimes Cozy Bear, the Dukes, or A.P.T. 29, is sponsored by Russia’s Foreign Intelligence Service (and has been since at least 2008).