I have stored safely away a "rogue dll."

It was caught because it masqueraded as a system dll and had a recent file date and had no version info.

Virusinfo misidentified it.

It's been renamed and the file extension as well.

I would like to study it safely with something similar to a debugger or maybe a passive type of analyzer.

I also use Linux, but could not find anything that can debug Windows PEs.

I would appreciate any recommendations.