“Mossad?”
That would be my first guess. But it could also be Ukrainians, because Iran has been supplying Russia with a bunch of stuff, especially drones.
You’re joking of course.
Perhaps Russia painted some of their Tu-141 drones in Ukrainian colors and launched it into Iran.
Blame Ukraine for the attack and convince Iran to join the war effort or at least sell Russia some ballistic missiles.
Or not.
Oh , that’s a shame…