Guard Pages

Created the Saturday 23 March 2019. Updated 1 year, 2 months ago.

Memory breakpoints are a technique used by malware to detect if a debugger is present. This technique involves setting up a "guard page" in memory, which is a page of memory that is protected by the operating system and cannot be accessed by normal code. If a debugger is present, the malware can use this guard page to detect its presence.

This technique works by putting a return address onto the stack, then accessing the guard page. If the operating system detects that the guard page has been accessed, it will raise a STATUS_GUARD_PAGE_VIOLATION exception. The malware can then check for this exception, and if it is present, it can assume that no debugging is taking place. This allows the malware to evade detection and continue to operate without being interrupted by a debugger.



Featured Windows API's

Below, you will find a list of the most commonly used Windows API's that are currently utilized by malware authors for current evasion technique. This list is meant to provide an overview of the API's that are commonly used for this purpose. If there are any API's that you feel should be included on this list, please do not hesitate to contact us. We will be happy to update the list and provide any additional information or documentation that may be helpful.

Code Snippets

Detection Rules

Additional Resources

External Links

The resources provided below are associated links that will give you even more detailed information and research on current evasion technique. It is important to note that, while these resources may be helpful, it is important to exercise caution when following external links. As always, be careful when clicking on links from unknown sources, as they may lead to malicious content.

Matching Samples 10 most recent

Sample Name Matching Techniques First Seen Last Seen
br1.dll 10 2024-12-03 3 days ago
396845aea1f1be292df345ea0a27...e8a89ce9487aea9996771dd7b48c 6 2024-11-19 2 weeks, 3 days ago
23b1971659b16e186f9e1b36d8bc...e512b346e78f77dc314503aac59a 13 2024-11-19 2 weeks, 3 days ago
al-khaser.exe 24 2024-11-13 3 weeks, 1 day ago
wdext.exe 10 2024-11-13 3 weeks, 2 days ago
View All

Sleeping Alien

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