dot11anonymizer

This is a Python script that anonymizes 802.11 Layer 2 information found in capture files. It supports the following 802.11 Layer 2 identifiable fields:

• MAC addresses (OUIs are preserved)
• SSID
• Alcatel, Arista, Aruba, Cisco, Extreme Networks, Fortinet, Huawei, Meter, MikroTik/Routerboard, Mist, Ruckus, Telecom Infra Project, Ubiquiti, and Zebra AP names (if present)
• HESSID (Hotspot 2.0)
• P2P Device ID (Wi-Fi Alliance P2P Specification)
• Device Name (WiFi Protected Setup)
• Model and serial number (Fortinet APs)

Requirements

You need Python3 and Scapy.

It is recommended to use a virtual environment:

python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt

Usage

python dot11anonymizer.py <input_file> [<input_file> ...]

where <input_file> is a capture file that contains 802.11 frames with Radiotap headers.

The script generates a copy of the file ending with the suffix -anonymized.pcap in the same location as the original file.

For example:

python dot11anonymizer.py ~/Desktop/mycapture.pcap

generates ~/Desktop/mycapture-anonymized.pcap

Notes

Since modifications to the frame will result in a different frame checksum, the script automatically fixes the FCS field for frames that originally had a good FCS. For frames that originally had a bad FCS, the script will set the FCS field to 0x00000000 to ensure that the FCS remains bad after any modifications.