BlueHammer Leaked 🪟, BYOVD Takes Out 300 EDRs 🛡️, Perplexity Incognito Sham ⚖️

**TL;DR** - Leaked Red Team tool BlueHammer demonstrates BYOVD bypassing 300+ EDR solutions.

The 10-Second Pitch

• BYOVD attacks use legitimate but vulnerable kernel drivers to disable endpoint detection
• BlueHammer leaked in the wild and already integrated into ransomware toolkits
• EDRs relying solely on user-mode hooks are now effectively neutered

Setup in 3 Steps

1. Audit your fleet for known vulnerable drivers using LGPO or Driver Bundle blocklists

2. Enable HVCI (Hypervisor-Protected Code Integrity) on Windows - it neutralizes most BYOVD attacks

3. Deploy kernel-level telemetry via ETW to catch driver abuse even when user-mode hooks are gone

**Example Prompt:**

List the top 10 most commonly abused BYOVD drivers in ransomware campaigns since 2023.

Verdict

If running Windows endpoints without HVCI, this is your signal to prioritize it. This attack class is no longer theoretical.