COFF33 is a quick and dirty COFF loader. It can be used to run COFF objects. In order to showcase the COFF Loader, the bamsi.c file is also provided that implements AMSI bypass through byte patching.
If insterested of how a COFF Loader actually works visit my blog where I have described the COFF in detail.
For educational purposes only.
open a powershell session and compile the COFF Loader as well as the object file
.\compile.bat .\COFFee.c
Then run
.\coffee.exe .\bamsi.o