Considering that COM programs are headerless I can't imagine any way a specially crafted binary could do anything since there is no parsing going on. The "COM l

Considering that COM programs are headerless I can't imagine any way a specially crafted binary could do anything since there is no parsing going on. The "COM loader" just hands it off to NTVDM which does not exist on 64-bit Windows (there are 3rd-party implementations though) And yes, the com extension is still recognized and will pop up a dialog telling you "This app can't run on your PC". But actually .com and .exe files are handled equivalently, so you can just rename an .exe (i.e. PE executable) to .com and it will run - that doesn't make it a COM executable though...