That fire could be just a coincidence. There is apt to be aluminum wiring, assorted vintages of security equipment, the original wire from the early days of electrification, etc., up there in that attic. The White House apparently has the same issue, so it's not some specific Russian issue. I have seen in it Edwarian-era homes in Canada-the wiring is FUBAR from just fishing in new wiring in over the years without any removal of old wires. The original wiring is still there, with some sort of current in it from somewhere. This why there is such a thing as a "Cone of Silence".