Crowdstrike is run by an ex-Russian hacker (now naturalized US citizen). It is either part of the deep state or at least has connections. The crowdstrike "evidence" for the DNC hack is the only such "evidence" (as Trump asked: where's the server?) It's a blog post where the ex-Russian hacker describes how he doodles around in the DNC server "watching" "Fancy Bear" and the other "Bear" while pretending to gather evidence of the source of the hacking. It was extremely unprofessional for starters.
And it's the "evidence" that Mueller is using. When I commented on how ridiculous it was back in summer 2016, another Freeper (forgot who) commented to me that it had to be Russians because he saw the source code. Seems very strange in retrospect.