POEX

POEX is abbreviated from Portable Executable

• What is it?

POEX describes work with the structure of executable (image) files and object files under the Windows family of operating systems. These files are referred to as Portable Executable (PE) and Common Object File Format (COFF) files, respectively. POEX is a library to access, load and manipulate PE files.

• PE Feature Support

PE Structures	Support Status	Description
DOS Header	Yes	Read, Write, Modify
File Header	Yes	Read, Write, Modify
Optional Header	Yes	Read, Write, Modify
Section Header	Yes	Read, Write, Modify
Data Directories Header	Yes	Read, Write, Modify
Export Table (Data Directory)	Yes	Read, Write, Modify
Import Table (Data Directory)	Yes	Read, Write, Modify
Resource Table (Data Directory)	Yes	Read, Write, Modify
Exception Table (Data Directory)	Yes	Read, Write, Modify
Certificate Table (Data Directory)	Yes	Read, Write, Modify
Base Relocation Table (Data Directory)	Yes	Read, Write, Modify
Debug (Data Directory)	Yes	Read, Write, Modify
Architecture (Data Directory)	useless	useless
Global Ptr (Data Directory)	Yes	Access
TLS Table (Data Directory)	Yes	Read, Write, Modify
Load Config Table (Data Directory)	Yes	Read, Write, Modify
Bound Import (Data Directory)	Yes	Read, Write, Modify
IAT (Data Directory)	Yes	Read
Delay Import Descriptor (Data Directory)	Yes	Read, Write, Modify
CLR Runtime Header (Data Directory)	Yes	Read, Write, Modify
Reserved (Data Directory)	useless	useless

• How to Build the Library?

1. Clone the repository

   • git clone https://github.com/AFP33/POEX.git

2. Open Visual Studio and just Build it

   • you need at least C++14
   • minimum SDK is 10.0

3. Use the output POEX.lib in your project

• Examples

Please use WIKI for more info.

Open PE File:

#include <iostream>
#include <POEX.h>  // include POEX header

int main()
{
    auto pe = POEX::PE(L"1.exe");

    // Other stuff here
    return 0;
}

Access to DOS Header:

#include <iostream>
#include <POEX.h>  // include POEX header

int main()
{
    auto pe = POEX::PE(L"1.exe");

    // Access to Image DOS Header
    auto dos = pe.GetImageDosHeader();

    // Access to 'e_magic' and 'e_lfanew' and print them in console as hex;
    std::cout << "Magic: 0x" << std::hex << dos.E_magic() << std::endl;
    std::cout << "e_lfanew: 0x" << std::hex << dos.E_lfanew() << std::endl << std::endl;

    // Change 'e_magic' and 'e_lfanew' values
    dos.E_magic(23118);
    dos.E_lfanew(249);

    /// Try to print again 'e_magic' and 'e_lfanew' field the structure
    std::cout << "Magic: 0x" << std::hex << dos.E_magic() << std::endl;
    std::cout << "e_lfanew: 0x" << std::hex << dos.E_lfanew() << std::endl;

    return 0;
}

Save change as original file or new one:

#include <iostream>
#include <POEX.h> // include POEX header

int main()
{
    auto pe = POEX::PE(L"1.exe");

    // Access to Image DOS Header
    auto dos = pe.GetImageDosHeader();

    // ******** some stuff here **********

    // If you want save change on Original file
    pe.SaveFile();

    // Else, you want save change on another file
    pe.SaveFile("another.exe");

    return 0;
}

• You can access other part of PE Structures as you see in here DOS Header example.
• More detail see Wiki.