Windows 11/10 has made system attacks difficult with the platform integrity becoming more difficult to compromise with the Windows Defender System Guard.
Windows Defender System Guard
The Windows Defender System Guard is created to:
- Protect system integrity at startup.
- Maintain system integrity through the runtime.
- Validate system integrity maintenance via local and remote indicators.
How System Guard works during boot-time
In Windows 7 threats went undetected and installed the Bootkit or Rootkit. The malware starts before Windows boots completely and gets the higher ground. This problem can be avoided if you are running Windows 11/10 on hardware certified for Windows 8 and above. The hardware ensures only authorized firmware gets through to the bootloader. The Secure Boot feature of the UEFI ensures this feature does not allow malware-like bootkit on the system.
Windows Defender System Guard protects the device and system from boot-level malware, so attackers no longer have the optimum advantage. System Guard allows only authorized files, drivers, and third-party apps to function during booting. When the booting is complete, the System Guard starts the anti-malware to scan third-party drivers post-booting.
System Guard also ensures that the booting has been completed without compromised system integrity. Only then does the rest of the system defense come into action.
How System Guard works during runtime
Acquiring ultimate security at the core level is not enough unless it is maintained. Even if an attacker has the upper hand, attacks can be kept at bay by safeguarding the integrity of crucial services and data. Windows 10 came with VBS to help us isolate the most sensitive data.
Windows 10 calls this portion the Windows Defender System Guard container. The hardware-based security required to maintain critical integrity during runtime are Credential Guard, Device Guard, etc. Parts of the Windows Defender Exploit Guard is also one of the many that come under this.
How System Guard works to ensure overall security
It is not enough to acquire and maintain system integrity at the start. Throughout the runtime and after, the system must be protected from malware. Windows Defender System Guard helps to validate platform integrity even at this stage. It is good to never assume security, no matter how advanced the protection may be. We must always be breach-ready. This is why System Guard comes with many technologies to enable remote analysis of system integrity.
During Windows boot-time, a few integrity measurements are recorded by System Guard using TPM 2.0, and hardware is isolated to ensure the data is not tampered with in case of a system breach. This data can now help detect anomalies in configuration, boot components, and more. System Guard seals the data using TPM and keeps it available for remote analysis by management systems like Intune and System Center Configuration Manager. According to the necessity, the management system can deny the device access to resources if anything is fishy.
Windows has bought the Windows Defender System Guard to enable a simplified Windows design and help users maintain and validate the platform’s integrity. Further work on this new System Guard will help make advancements in the field of platform integrity protection. The Windows Defender System Guard is still a work in progress but will give the OS ultimate platform integrity and security. The future of Windows is in its advanced security system now, and every big and small update is taking it closer to that future.
Read next: Windows Defender Application Control feature in Windows.
