Russia is quite far away to send a plane small enough to fly low over the building and drop a device onto the roof, and I don't think you're allowed to throw things out of an airliner window anyway
This would be nothing new, I remember ages ago in the days of WEP that you could buy a small box that would collect enough handshakes to let you crack the WEP password.
The timeline here for the entire sequence of events is 1-2 weeks.
I've tried the WPA equivalent attack (capture handshake, crack offline...) against targets with physical security that extended beyond their wifi. It was a bit arduous and fiddly and expensive and risky. If I could've compromised a neighbor and gotten the handshakes without traveling for them I'd definitely have preferred that option.