Chimera: Code Injection in Linux ELF Files

Chimera is a program that injects a code (malicious code) into a Linux ELF program by overwriting the PT_NOTE section of the target ELF file thereby enabling the hacker run malicious code. This malicious code could be a backdoor.

To show Chimera in action, I dropped a video showcasing how to use Chimera. In this demo, I injected a TCP socket client written in Intel x86_64 assembly into an ELF file and connected it to a custom TCP server in C.

I reimplemented the ELF inject program, originally written by Dennis Andriesse, using my own approach while retaining some of the core ideas.

This technique demonstrates the potential of binary manipulation and reverse engineering, making it an insightful watch for cybersecurity enthusiasts, penetration testers, and low-level programming geeks.

🔍 What's Covered:

🔹 Using Chimera for code injection in ELF files

🔹 Writing and injecting a TCP socket client in x86_64 assembly

🔹 Setting up a C-based TCP server for remote connections

🔹 Demonstrating how the modified ELF file connects to the server

Curious to see Chimera in action? Check out the video and explore the code on GitHub: https://GitHub.com/Hotwrist/Chimera

📽️Video (Youtube): https://youtu.be/lERlV4RC_EA?si=h6w0Eu6Ggf0lXx6i

💡 If you’re into reverse engineering, binary analysis, or offensive security, this is for you!

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