I'd say it's a safe bet that most if not all Republican officeholders benefited. If the object was takeover, why only target a handful of systems when they probably all have many or most of the same holes?
They are frightened their puppet president will be forced out. I truly hope the Dems get their act together and take back Congress. If not these thugs will be emboldened further.
I don't believe there is any 'perhaps' about it. If they can take the WH, and both houses of congress, they are bound to benefit if not by collusion, then by inclusion.