INT 0x2D

Created the Wednesday 22 June 2022. Updated 1 year, 1 month ago.

When the instruction INT2D is executed, the exception EXCEPTION_BREAKPOINT is raised. Windows uses the EIP register as an exception address and then increments the EIP register value. Windows also examines the value of the EAX register while INT2D is executed.

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.

• IsDebuggerPresent
• AddVectoredExceptionHandler

Contributor

• Thomas Roccia (fr0gger)

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.

• https://www.autosectools.com/anti-debugging-with-exceptions.pdf
• Anti-Debug: Assembly instructions

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