MasonProtector

A .NET assembly protector and obfuscator. It rebuilds your compiled program into a hardened version that is hard to read, decompile, or crack — while it runs exactly like the original.

English  ·  العربية  ·  Full technical manual (PDF)

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English

Overview

MasonProtector takes a compiled .NET file (.exe or .dll) and rebuilds it into a protected version: names are scrambled, strings and numbers are encrypted, method bodies are turned into virtual‑machine bytecode, and a runtime layer watches for debuggers, virtual machines, and memory dumpers. The protected program behaves exactly like the original.

Protection layers

• Renaming — every class, method, and field name becomes a meaningless symbol.
• Encryption — strings, numbers, fields, arrays, and whole method bodies are encrypted and rebuilt only at runtime.
• Obfuscation — control‑flow flattening, a custom virtual machine, method scattering, opaque predicates.
• Anti‑analysis — detects debuggers, virtual machines, dumpers, and API hooks by their behaviour, so renaming a tool does not bypass it.
• Stealth — hides the assembly's shape from decompilers and metadata readers.
• Licensing — a built‑in key system that ties each licence key to the customer's machine.
• Extras — merge dependencies into one file, export the logic to a side DLL, compress resources.

Before and after

Measured on a small sample program at the Max preset:

	Original	Protected
Types	8	715
Methods	23	4,601
Readable strings	54	0 (all encrypted)
Names	LicenseChecker, Validate	random symbols
Behaviour	runs	runs identically

// Before — your original code, fully readable in any decompiler
class LicenseChecker {
    const string Key = "PREMIUM-2024";
    public bool IsValid(string input) => input == Key;
}

// After — decompiled from the protected build
class q8XzP {
    //  "PREMIUM-2024"  ->  encrypted, rebuilt only at runtime
    //  method body     ->  virtual-machine bytecode / flattened control flow
    //  unreadable, practically un-decompilable
}

Usage

Interface — open MasonProtector.exe, pick your file, choose a preset (or tick the options you want), and press Protect.

Command line:

MasonProtector.exe --protect MyApp.exe MyApp_protected.exe --preset max

Presets: none, default, hide, max, all.

Note

For protecting your own software. You are responsible for how you use it and for following the laws that apply to you.

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Full technical manual: docs/MasonBook.pdf

_{MasonGroup · 2026 · MIT License}