Sorry for my double post. I've just entered via anydesk into several PCes to check why they received bans. They claim they have nothing, just default nonsteam cs.
Both were Warzone CS. I checked everything and didnt find anything strange concerning aliases. Litteraly, it is default CS BUT I FOUND SOMETHING ELSE!
Inside of root folder of cstrike, warzone CS has something like "Audio codec".dll files.
Could it be that?
Bans were "3" [Alias] Half-Life Sound Selector Script