All Windows PCs come with a built-in security feature called Windows Defender Application Controls (WDAC), which helps prevent unauthorized software from running by allowing only trusted applications.
But despite its purpose, hackers have discovered several ways to bypass WDAC and expose the system to malware, ransomware, and other cyber threats.
As a result, what was once considered a powerful layer of defense could now become potential vulnerability, even if it cannot be managed correctly.
Images of Windows laptop. (Kurt “Cyberguy” Knutsson)
What is Windows Defender Application Control (WDAC) Bypass?
Windows Defender Application Control (WDAC) is Security features in Windows This implements strict rules on which applications can be run. It helps to block unauthorized software, but researchers have found ways to bypass these protections.
Bobby Cooke, the Red Team Operator of IBM X-Force Red, Confirmed Microsoft teams can be used as WDAC bypass. He explained that during the Red Team operation, they were able to bypass WDAC and perform phase 2 command and control payloads.
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To find and fix these security gaps, Microsoft runs a bug bounty program that rewards researchers with reports of vulnerabilities in WDAC and other security components. However, some bypass technologies have not been moved for a long time.
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How Hackers Bypass Windows Defender Application Control
One of the key ways an attacker can surround WDAC is to use wild binaries or Lolbins. These are legal system tools preinstalled by Windows, but Hackers can repurpose them Execute unauthorized code while avoiding security detection. Since these tools are trusted by the system, they provide an easy way to go beyond defense capabilities.
Some bypass techniques involve DLL side-layers, where an attacker tricks a legitimate application into loading a malicious DLL instead of the expected DLL. Additionally, if WDAC policies are not executed correctly, an attacker can modify the execution rules to allow unauthorized software to run.
Hackers also use unsigned or loosely signed binary files. WDAC relies on code signatures to verify the authenticity of an application. However, attackers sometimes exploit misconfigurations of missigned or unsigned binary files, causing them to execute malicious payloads.
Once an attacker bypasses the WDAC, they can execute the payload without being marked by traditional security solutions. This means they can deploy ransomware, install backdoors, or move laterally across the network without triggering immediate suspicion. Since many of these attacks use built-in Windows tools, detecting malicious activity becomes more difficult.
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Images of Windows laptop. (Kurt “Cyberguy” Knutsson)
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3 Ways You Can Protect Your PC from WDAC Hackers
Since this attack takes advantage of the vulnerability inside the WDAC, there is little you can do to protect yourself. It depends on Microsoft to solve the problem. However, you can follow three best practices to reduce your risk.
1. Keep the window updated: Microsoft regularly releases security updates for the patched vulnerability, including security related to WDAC. Keeping Windows and Microsoft Defender up to date ensures you have the latest protections for known threats. If you are not sure what to do, please see mine Guidelines on how to update all devices and applications.
2. Be cautious about software downloads: Install applications only from trusted sources such as the Microsoft Store or official vendor websites. Avoid using pirated software, as it can be bundled to malicious code that bypasses security protections like WDAC.
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3. Use powerful antivirus software: According to the report, it seems that hackers do not need user interaction to bypass WDAC. The described approach shows that attackers can exploit these vulnerabilities without direct user input, especially if they already have some level of access to the system.
However, in practical cases, attackers often combine these vulnerabilities with social engineering or phishing to gain initial access. For example, if an attacker gains access through a phishing attack, they may use the WDAC bypass method to perform further malicious payloads.
Therefore, while some bypass techniques may not require direct user input, attackers often use user operations as entry points before exploiting WDAC vulnerabilities. The best way to avoid becoming a victim is to install powerful antivirus software. The choice of the best 2025 antivirus protection winners for your Windows, Mac, Android and iOS devices.
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Kurt’s key points
Although Windows Defender Application Control (WDAC) provides a valuable layer of security, it is not foolproof. Hackers are actively developing and using WDAC bypass technology to exploit gaps in system defense. Understanding how WDAC bypass works is essential to protecting your device. By keeping your software up-to-date, using trusted applications, and relying on reputable security tools, you can significantly reduce your risk.
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