[lionkor]

This may be a silly question, but how do they know who did it?

[adriancr]

They investigate, but seriously, forensics, monitor active intrusions, honey traps, etc

[hulitu]

> This may be a silly question, but how do they know who did it?

They don't know. But it is fashionable to blame the Russians. /s

[darthrupert]

And being against nazis is 1940s was just another fashion statement. "/s"