I wonder if the Windows 11 firewall can prevent data leaks by creating a rule that blocks incoming and outgoing connections for an executable file, such as *bitcrack.exe*, in case the developer has embedded a spyware module that transmits keys and scanned ranges over the network. Or is the most reliable option to run the brute-force process on a computer completely disconnected from the internet?
I would never use an OS famous as being the heaven of viruses and malware, to do anything related to crypto, let alone run some random dude's exe on it. You might as well already have some shell code gifted from maybe opening a bad GIF, that scans your RAM for keys on a constant basis.
The safe option is to solve it offline, while buried and EM-shielded (to avoid RF side channel attacks). Check once a month if the key is ready (do not use a physical monitor for this, I think fiber optics are immune to hijacking the signal remotely).