How to write and executable Windows .exe manually (machine code with Hex editor)?

Question

I\'d like to know how is it possible to write something as simple as an Hello World program just by using an Hex Editor. I know that I could use an assembler and assembly langua

Answer 1

I make binaries by hand, but I think it's easier in assembly itself than a pure hex editor, where updating anything would be difficult.

• The easiest is surely DOS COM format, which you can even type in notepad, or at least, it's very easy even for a normal Hello World.

• The EXE (non DOS format) doesn't require much either see here.

• If you're trying to make a PE, you can make a TinyPE.

Most binaries should be available as PE, and EXE and COM.