Patur what you say makes sense, however, masah satan is from a chasidish rebbe. Bottom line is that you can not bring any proof by saying it was yad Hashem or from the Satan.
I honestly have no idea how the Satan concept makes sense since the Satan does not work independently. Like everything else in this world, it all comes from Hashem. In Eyov, the Satan could do no more than what Hashem let him do to Eyov. It kind of sounds like kfera to me but I am no posek:-) so who knows…