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I have a PE which I'd like to edit. I know I can create patches in OllyDbg and similar tools, but they all have one thing in common: I have to overwrite some present code in file. I wonder if it is possible to somehow enlarge the executable, put the code in the appended part, and then just change a few instructions in original part to jmp to the new part? I searched over the Internet, but I haven't found an obvious solution (well, some propose writing code in NOP sections, but my code i longer than the longest of them).

Note that the PE is 64-bit, so the solution must work for this architecture.

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Yes, you can add a new section to your PE file.

High-level instructions at Adding sections to PE Files and low-level instructions at Inject your code to a Portable Executable file.

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  • Also, related post on this site (though not a duplicate) - Add Section to pe file function error Jul 1, 2015 at 18:13
  • The thing I eventually went by was adding a new section in PELord at the very end and put my code there.
    – sarka
    Jul 5, 2015 at 23:40

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