I have those files and get the same result today even though I scanned again very recently and didn't get that. One of the files seem to have been altered on the 4th of this month for me, what about you? The other one, in bin, seemingly hasn't though.
I guess it's the latest definitions causing it. Weird as I rarely if ever get false positives with this one.
I don't have real time protection so I have to do a full scan every time I want this lol, I do it semi often since the program's great.
Edit: maybe I spoke too soon, the scan wasn't done, I just assumed the 2 detections were those files, but now it's gone up to 4 detected objects, I don't imagine all of those will be in Steam. Maybe the latest definitions cause more false positives, or I'm infected with something nasty for real. Or both, of course, I occasionally catch some light stuff, or it could be bad cookies etc.