The Ruskies saw how effective anti radiation missiles could be when used by pilots flying directly into death and getting the systems fully active. When Rus/Viet were getting ready to get easy kills, the anti radiation missiles were sent out by both. The missiles targeted radiation which the Rus knew how to hide until ready to fire. As it turns out, Russians didn't expect a suicide mission nor the results. It would usually result in the destruction of the SAM site.
My point is that Russians probably have anti radiation missiles but they have more often experienced how effective they were against themselves. Their songs about shooting down American pilots don't mention Wild Weasels.
These anti radiation missiles like the AGM-78 ARM would go after radiation sources at Mach 1.8. It was a converted SAM but just used the power for more speed.
They would ride the waves of radiation directly to the source. In modern versions they can target radios but these are both going to have characteristic signals and will likely try to transmit as little as possible.
A lot to say so little.
