Get the Whitepaper called Cheats with ELF – Code Injecting into ELF Headers.
You can download it from the following link: https://packetstormsecurity.com/files/download/91233/elf-eng.txt
Source: https://packetstormsecurity.com/files/91233/Cheats-With-ELF-Code-Injecting-Into-ELF-Headers.html