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Examining Self-Defending Malware
LearnREMAUnit 62

Topic 6.2 of Examining Self-Defending Malware

Debugger Detection Techniques

API-based detection (IsDebuggerPresent, NtQueryInformationProcess), PEB-based detection (BeingDebugged, NtGlobalFlag, heap flags), timing checks, 0xCC self-scan, debug register detection, TLS callbacks, and the bypass priority sequence.

~30 min total·4 quadrants of structured content

By the end of this topic, you will

  • Describe three API functions used for debugger detection and the bypass for each
  • Locate and patch BeingDebugged and NtGlobalFlag in the PEB dump
  • Explain why _NO_DEBUG_HEAP=1 defeats heap-based detection without PEB patching
  • Explain why hardware breakpoints defeat the 0xCC self-scan technique
  • Configure x64dbg to break on TLS callbacks and pass Trap Flag exceptions to the program
  • Apply the six-step bypass priority sequence before loading a self-defending sample
Q1 · E-TUTORIAL (1)Q2 · E-CONTENT (1)Q3 · WEB RESOURCES (7)Q4 · SELF-ASSESSMENT (2)

Quadrant 1 · e-Tutorial

Video lectures and walkthroughs

Quadrant 2 · e-Content

Articles and case studies

Education

Debugger Detection Techniques

Every major debugger detection technique — API-based, PEB-based, timing, hardware breakpoint scanning, TLS callbacks, trap flag, and interrupt-based — with the exact bypass for each.

20 min read

Quadrant 3 · Web Resources

Downloadable material and curated external links

Downloadable reference material

EBook

REMA eBook 2026

v1.0

Open resource

Cheatsheet

REMA Cheatsheet 2026

v1.0

Open resource

MCQ Bank

REMA MCQ Bank 2026

v1.0

Open resource

Question Bank

REMA Question Bank 2026

v1.0

Open resource

Featured Podcast

Podcast Episode

The Art of Deception: Unmasking Anti-Analysis & Evasion Techniques

A technical examination of the self-defence mechanisms used by self-defending malware — how threats detect sandboxes, sabotage debuggers, and hide from automated analysis, and how analysts defeat each technique.

Listen now

External links

ScyllaHide — Complete Anti-Debug Bypass Plugin

Open-source x64dbg plugin defeating PEB checks, NtQueryInformationProcess, timing, and debug register queries simultaneously.

MITRE ATT&CK — Debugger Evasion (T1622)

ATT&CK technique for debugger evasion with documented real-world procedure examples from threat actor tools.

Quadrant 4 · Self-Assessment

Test your knowledge — earn a certificate on first pass

Examining Self-Defending Malware

Covers anti-debugging techniques, virtual machine and sandbox detection, protection of embedded data, code misdirection, and advanced unpacking methodologies.

20 questions30 minPass: 60%

REMA Complete Assessment

A comprehensive 120-question assessment covering the entire Reverse Engineering and Malware Analysis curriculum: malware taxonomy and reverse engineering fundamentals, static and dynamic analysis, reversing malicious code, malicious web and document files, in-depth analysis of packed and fileless malware, and self-defending malware techniques.

120 questions90 minPass: 60%