Are you referring to a specific or reverse engineering challenge where you need a "write-up" or technical paper explaining how to solve it?
I'm not quite sure what you're looking for with . This sounds like it could be a few different things, and I want to make sure I give you the right kind of help: Reversive.rar
Could you clarify which one you're interested in, or provide a bit more context on what the file contains? Are you referring to a specific or reverse