Just name your payload something like "foo\u200fism.jar" (\u is the Python escape for arbitrary unicode codepoints) And Windows will (as of a couple years ago

Just name your payload something like "foo\u200fism.jar" (\u is the Python escape for arbitrary unicode codepoints) And Windows will (as of a couple years ago, at least) render it as "fooraj.msi" (Though I'm not sure what kind of verification prompt you'd get in this circumstance)