How Can I Protect Myself from the BlueHammer Exploit?

Interesting point! To prevent detection by Windows Defender, creating exceptions could help, but it really narrows down the window for when this exploit can be utilized undetected. A solid business AV would probably catch this, though!

Don't forget, Microsoft sometimes releases out-of-band fixes, so keep an eye out for updates, especially on a Friday night! There was a signature update pushed out that flags the exploit, but it’s not a complete fix. If you're using third-party security software with Defender, check in with them to see if they’ve implemented additional measures.

I’ve been thinking about how this might have been handled better. It shouldn’t be too complicated to create a script that flags potential exploit attempts based on certain event IDs. As long as your AV is responsive, you should be fine, but I hope Microsoft can tighten up their processes after this.

This exploit highlights why relying solely on signature-based antivirus software is pretty outdated now. Although this is a significant vulnerability, it does require local authenticated access, which isn't a huge concern if you've got decent security practices in place. Ideally, you should be using endpoint detection and response (EDR) solutions that analyze behavior patterns to catch suspicious activities. Just my two cents!