CheckRemoteDebuggerPresent

CheckRemoteDebuggerPresent is a kernel32.dll function that sets (-1)0xffffffff in the DebuggerPresent parameter if a debugger is present. Internally, it also uses NtQueryInformationProcess with ProcessDebugPort as a ProcessInformationClass parameter.

Technique Identifiers

U0121 B0001.002

Evasion Categories
Anti-Debugging icon
Anti-Debugging

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.
Created

March 18, 2019

Last Revised

March 24, 2026