I’m not sure that these things work the way you think they do… an antivirus wouldn’t just look for the name of an executable to be “legit.exe” but rather would look at what the program calls itself in it’s manifest, compute the hash for the executable binary file, and compare that hash against a database of known good hashes. If the contents of the executable compute a hash identical to the known good hash, then you know the contents of the executable are clean.