Technically, they are copyrighted. So it's copyright infringement. It isn't illegal to paint a copyrighted symbol, but it can be illegal to sell it. If its on, hey I have this old xbox that I painted and I'm selling it now, no company has the means or motivation to search for or come after you for a single sale.
If its oh hey I have this business painting copyrighted logos on xboxes and reselling them, they at some point find it worthwhile to do something about it.
Generally you'll get a cease and desist notice before they take any action.