byovd attacks

About this tag
BYOVD attacks, or Bring Your Own Vulnerable Driver attacks, are a growing cybersecurity threat where attackers exploit legitimate but vulnerable kernel-mode drivers to bypass security defenses. On Windows systems, these attacks often target drivers like rwdrv.sys (associated with ThrottleStop) or WinRing0 to disable antivirus software such as Microsoft Defender. Recent ransomware campaigns, including Akira, have used BYOVD techniques to gain kernel-level access and neutralize security features. Microsoft has responded by updating the Windows Kernel Vulnerable Driver Blocklist in updates like KB5055612 to include drivers known to be exploited in BYOVD attacks. Understanding these threats is critical for IT professionals and Windows users to protect against driver-based exploits.
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