MonoStrata

MonoStrata: Secure Runtime Method Patching for Unity

Phase 1 Price + 10% Off at launch

MonoStrata is a native patching engine for Unity’s Mono backend, enabling developers to intercept and reroute JIT-compiled methods at runtime with precision and safety. Built for systems engineers, diagnostics developers, and advanced Unity toolmakers, MonoStrata gives you low-level control without the risk of unsafe memory manipulation or brute-force DLL hacking.

This is Phase 1 of a multi-phase system. It includes full support for:

• Secure 1:1 native method replacement
• Built-in hashing for pointer validation
• Strict patch filtering, user assemblies only (Assembly-CSharp, not UnityEngine)
• Lightweight runtime API and Validator(C#) and native enforcement layer (C++)
• Runtime restore system to revert patched methods on-demand
• Support for Func<>, Action<>, and custom delegates

Built-In Safety

• Blocks all Unity internal methods (UnityEngine, UnityEditor, etc.)... only user-defined methods in Assembly-CSharp-like assemblies are eligible for patching
• Native patching locked behind secure validation
• The native runtime cannot patch anything without validation from the interop, enforcing multiple safety layers:
• Requires a cryptographically hashed value generated by the interop
• Patching is only allowed for direct delegate references (no reflection, no indirect calls)
• The native runtime is non-functional without the interop layer; this guarantees:
• Runtime and interop are inseparable
• Patching cannot proceed without .NET-side safety checks
• Runtime usage is tied to safe, verified entry points only
• All patch operations include structural checks, signature verification, and fallback handling to prevent access violations or instability
• Patched methods can be reverted at any time, restoring the original function pointer with full integrity

Package Includes

• Fully documented API
• Native DLL for runtime execution
• Unity interop layer with logging and validation
• Example MonoBehaviour for integration
• PDF manual covering validation, patching, restore lifecycle, and license