Red Hot Cyber
Cybersecurity, Cybercrime News and Vulnerability Analysis
In early February 2026, a sophisticated attack caught the attention of cybersecurity experts. Threat actors gained entry to a network using compromised SonicWall SSLVPN credentials. Once inside, they unleashed a method designed to neutralize security software entirely.
The attackers employed an EDR-killing tool that exploited a legitimate EnCase forensic driver. This driver, although revoked, allowed them to operate in kernel mode. Kernel mode access gave them the ability to terminate security processes that usually protect endpoints.
This technique is referred to as “Bring Your Own Vulnerable Driver” or BYOVD. By leveraging a trusted driver with elevated privileges, attackers bypass many common defenses that rely on standard process monitoring.
The method is particularly alarming because it doesn’t rely on traditional malware signatures. Security software that typically detects abnormal behavior may remain oblivious while the driver quietly disables protections.
The attack specifically aimed to dismantle endpoint detection and response (EDR) systems. Once the driver was loaded, it methodically sought out active security tools, shutting them down to prevent detection of further intrusion.
Analysts noted that the use of a revoked certificate on the driver did not hinder the attackers. Modern defenses sometimes ignore such certificates when the driver appears legitimate, creating a dangerous blind spot.
The operators demonstrated a clear understanding of the target environment. By combining stolen VPN credentials with a high-privilege driver, they maximized access and minimized chances of early detection.
This incident highlights a growing trend in cyber threats: attackers increasingly exploit legitimate system components against their hosts. The reliance on trusted drivers for security bypasses emphasizes the need for continuous monitoring of kernel-level activity.
Organizations should consider additional controls such as driver integrity verification and real-time alerts for unusual process terminations. Proactive threat hunting becomes crucial to identify these subtle yet impactful intrusions.
The research and analysis were conducted by Huntress, who documented the attack in detail, illustrating both the entry point and the sophisticated techniques used to neutralize endpoint defenses.
Ultimately, this event serves as a stark reminder: attackers are evolving beyond traditional malware, using system-level vulnerabilities in innovative ways. Staying ahead demands vigilance, layered defenses, and constant adaptation.
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