macchanger

Keith Pachulski
May 5
3 min read

🧙‍♂️ Introducing macchanger: Finally, a MAC Spoofing Tool That Works on Windows 11

Spoiler: Yes, we know the name’s been used before. No, we don’t care — this one actually works on modern Windows.

💡 Why We Built It

During recent physical security engagements, we kept running into the same problem: MAC spoofing tools that just don't work on Windows 11. Either they would:

Crash on startup,
Throw cryptic driver errors,
Or worse — fail silently while we thought we were stealthy.

In the middle of a red team op, that's not just inconvenient — it's unacceptable.

So we built our own: a dead-simple, zero-dependency MAC address changer for Windows 11 that works consistently on both Intel and Realtek NICs. Whether you're automating part of your op or trying to blend in on-site, macchanger has your back.

🎯 What's macchanger?

macchanger is a Python-based MAC address spoofing tool that’s purpose-built for physical security teams, red teamers, and stealthy operators who need a reliable, Windows-native solution.

Github: https://github.com/sec0ps/macchanger/tree/main

You can use it via GUI or CLI, automate it in scripts, and revert your MAC address cleanly when you’re done.

🧰 Feature Rundown

✅ Windows 11 Compatible (tested on 23H2 and up)
🔄 Spoof or restore MAC addresses
💻 GUI or CLI mode — your choice
⚡ No dependencies — built with Python standard library only
🧙‍♂️ Minimalist by design — no drivers, no DLL hell
🧹 OPSEC-aware — small, clean footprint

❌ Why Not Use Existing Tools?

We tried. A lot of them.

But most existing tools are either:

Built for Linux and only half-ported to Windows,
Rely on outdated WinPcap/Npcap stacks that modern Windows 11 systems reject,
Or simply fail when handling adapter resets or specific chipsets.

We got tired of explaining to clients why our spoofing failed during a demo — so we stopped relying on other people’s tools.

🖥️ System Requirements

Windows 11
Python 3.6+
Administrator privileges

🚀 How To Use

🔧 CLI Mode

You like typing commands. We get it.

# List interfaces
python macchanger.py -l

# Change MAC address to a specific value
python macchanger.py -i "Wi-Fi" -m 00112233AABB

# Use random MAC
python macchanger.py -i "Wi-Fi" -r

# Interactive interface selector
python macchanger.py -I

# Show help
python macchanger.py -h

🖱️ GUI Mode

Just run the script without arguments:

python macchanger.py

You'll get a lightweight, native GUI to:

View available interfaces
Pick your target NIC
Enter a custom MAC or generate a random one
Apply changes and reset when done

🧪 Tested Hardware

Windows 11 Pro (23H2+)
Intel onboard NICs
Realtek USB NICs

⚠️ Gotchas & Limitations

Requires Admin privileges (UAC prompt expected)
Interface resets briefly when changing MAC
Some USB Wi-Fi adapters don’t support spoofing (hardware-locked)
May require reboot to persist MAC changes on some systems

🆘 Troubleshooting Tips

Run as Administrator!
Use -l or -I to ensure you’re selecting the correct adapter
Try a different MAC if one fails — some drivers restrict vendor ranges
Reboot if the change doesn't appear to stick

👮‍♂️ Legal & Ethical Notice

This tool is intended for authorized security assessments only. Always obtain explicit permission before spoofing MAC addresses in a network environment.

If you're unsure whether you have legal clearance, you probably don’t — ask first.

📬 Contact & Support

Author: Keith Pachulski

Company: Red Cell Security, LLC

Email: keith@redcellsecurity.org

Website: redcellsecurity.org

Support: operations@redcellsecurity.org

If you find this tool useful in your red team ops, feel free to buy us a coffee or support future development.

📜 License

MIT License — free to use, modify, distribute. Attribution appreciated but not required.

🧩 Final Thoughts

Naming tools is hard. Making them work shouldn't be.

So here’s macchanger — no frills, no fancy marketing, just a solid, dependable MAC spoofing utility for Windows 11. If it saves you five minutes during an engagement, it’s done its job.

Happy hacking — ethically.