🚩 CTF Writeups & Binary Exploitation

Welcome to my Cybersecurity & Reverse Engineering repository!
This repository contains my personal writeups, exploit scripts, and analysis for various CTF (Capture The Flag) challenges, with a primary focus on Binary Exploitation (Pwn) and Reverse Engineering.

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🛠️ Tools & Environment

• OS: Ubuntu (WSL2 / Linux)
• Debugger: GDB with GEF (GDB Enhanced Features)
• Exploitation Framework: Python 3 + pwntools
• Disassemblers: objdump, Ghidra

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📊 Solved Challenges

🔹 picoCTF

Category	Challenge	Difficulty	Tech Stack / Concepts	Writeup Link
Binary Exploitation	Picker IV	Medium	Function Pointer Redirection, Symbol Lookup, pwntools	View Writeup
Binary Exploitation	Buffer Overflow 0	Easy	Stack Buffer Overflow, Unsafe strcpy(), SIGSEGV Handler, pwntools	View Writeup
Binary Exploitation	Local Target	Medium	Stack Variable Overwrite, Offset Analysis, pwntools	View Writeup
Binary Exploitation	Buffer Overflow 1	Medium	Control Flow Hijacking, 32-bit Architecture, EIP Overwrite, pwntools	View Writeup

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💡 Key Focus Areas

• Stack-based memory corruption vulnerabilities (Buffer Overflows, Variable Overwriting)
• Dynamic memory & stack layout analysis via GDB/GEF (De Bruijn / Pattern Matching)
• Control flow hijacking & function pointer redirection
• Reverse engineering 32-bit & 64-bit ELF binaries
• Writing clean, automated exploits in Python (pwntools)

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👨‍💻 Raz Eini (2026)