this script will help you find favicon hashes which you can use in shodan to widened your attack surface
Pre-requisite:
pip3 install mmh3 requests favicon
Usage:
python3 get_favicon_hash.py URL containing favicon.ico
Example:
root@Kali:~/Desktop/Favicon_Hash# python3 get_favicon_hash.py
Enter URL to get the mmh3-HASH: https://facebook.com/favicon.ico
-1321378357
Now Use this on Shodan For Searching,http.favicon.hash:-1321378357