Do you seriously expect criminals are dumb enough to leave any useful information there?
Was it ever released how they found and imaged his server though?
Nobody is smart at everything 100% of the time.
The meth dealer two houses down who serves people out his front window probably isn't thinking straight. What we're dealing with here is a different category of thinking.
It's not like someone will sue for copyright infringement.
https://www.reddit.com/r/Bitcoin/comments/6axuzs/wannacry_wc...