Anti-Debug & Anti-Detection Glossary
Anti-debugging techniques protect software from analysis. Understanding these terms helps bypass protections.
IsDebuggerPresent
Windows API checking the PEB BeingDebugged flag to determine if being debugged.
PEB (Process Environment Block)
Structure storing process global info, including BeingDebugged and NtGlobalFlag debug detection flags.
NtQueryInformationProcess
Can check ProcessDebugPort non-zero value to determine if being debugged.
Timing Check
Detecting breakpoint-introduced delays by measuring instruction execution time, e.g., RDTSC checks.
Exception Handling Check
Intentionally triggering exceptions; if intercepted by a debugger, its presence is confirmed.
DR Register Check
Checking debug registers (DR0-DR7) to detect hardware breakpoints.
INT 2D Detection
Using behavioral differences of INT 2D exceptions under debugger vs. no debugger for detection.
EPT Bypass
Using VT Debugger's EPT mapping so anti-detection code reads forged memory contents.
VT Debugger's VMX root mode is naturally immune to most ring3 anti-debug techniques.
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