How To Find out The Real Type Of a File Without an Extension using File Signatures

How To Find out The Real Type Of a File Without an Extension using File Signatures.

Many, though certainly not all, files begin with a series of fixed values that identify the type of file that they are.

"Naturally, there is no definitive list of what files have what signatures."

A great example is the .EXE file. All .EXE files begin with two bytes: 4D, 5A. That's the hex value.
Similarly, many other file types have these so called "signatures" as well.

Our goal will be to examine the first few bytes of a file using a hex editor and then use what we find there to see if we can determine the file format.
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