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code-obfuscation-deobfuscation

Code obfuscation analysis and deobfuscation playbook. Use when reversing binaries protected by junk code, opaque predicates, self-modifying code, control flow flattening, VM protection, or string encryption.

skills/code-obfuscation-deobfuscation/SKILL.md

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# SKILL: Code Obfuscation & Deobfuscation — Expert Analysis Playbook

> **AI LOAD INSTRUCTION**: Expert techniques for identifying, classifying, and defeating code obfuscation in native binaries. Covers junk code, opaque predicates, SMC, control flow flattening, movfuscator, VM protectors (VMProtect/Themida/Code Virtualizer), string encryption, import hiding, and anti-disassembly tricks. Base models often conflate packing with obfuscation and miss the distinction between static and dynamic deobfuscation strategies.

## 0. RELATED ROUTING

- [anti-debugging-techniques](../anti-debugging-techniques/SKILL.md) when the obfuscated binary also has anti-debug layers
- [symbolic-execution-tools](../symbolic-execution-tools/SKILL.md) when using angr/Z3 for automated deobfuscation
- [vm-and-bytecode-reverse](../vm-and-bytecode-reverse/SKILL.md) for deep VM protector bytecode analysis

### Quick identification picks

| Symptom in IDA/Ghidra | Likely Obfuscation | Start With |
|---|---|---|