This is a Phishing tool. Phishing is a type of hacking also called credential harvesting. It creates fake websites for victims to login which saves their login info which includes IP, User-Agent, Username and Password to a file in the computer running Blackeye. This tool has been there for Linux and even Android via Termux. I converted it to Windows.
──(root㉿kali)-[/home/kali/Blackeye-for-Windows] └─# blackeye.bat blackeye.bat: command not found