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    <p>Most popular compilers have a switch to fill in the "Checksum" field of the PE header, or, you can leave it blank and supply your own custom vale. At any rate this is the 'standard' place to store such data.</p> <p>Unfortunately there's no real way to stop someone tampering with a binary, because you'll have to put checks inside the exe itself to detect it, at which point they can be patched out.</p> <p>One solution to this problem is to encrypt certain functions and use the checksum of some known data as the key (for example the checksum of another function). Then, when you leave the function you reencrypt it. Obviously you'll need to come up with your own prologue/epilogue code to handle this. This is not really suitable if your program is heavily multi-threaded, but if you're single-threaded or only lightly threaded (and can serizalize access to the functions and control all entry points) then this will 'raise the bar' if you will.</p> <p>That is a step above most 'packers' which simply encrypt the .text/.data/.rdata/etc sections and decrypt it all at runtime. These are very easy to 'dump', as all you have to do is run the program, suspend all its threads, then dump the memory to a file. This attack works against Themida for example (one of the most aggressive packers). From there all you need to do is rebuild the IAT, fix up some relocs, etc.</p> <p>Of course it's still possible for the attacker to use a debugger to dump out the unencrypted code and hence 'unpack' the exe, but obviously nothing is foolproof.</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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