Debugging

R3zk0n · October 2, 2025

Web   Windows
Contents

    Debugging .NET web applications can sometimes be a bit tricky due to the optimizations that are applied to the executables at runtime. There is a way to modify how a target executable is optimized at runtime.

    [assembly: Debuggable(DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints)]

    Disable Optimisations (Using dnSpy)

    [assembly: Debuggable(DebuggableAttribute.DebuggingModes.Default | DebuggableAttribute.DebuggingModes.DisableOptimizations | DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints | DebuggableAttribute.DebuggingModes.EnableEditAndContinue)]
    • The actual file is not used but instead the file is copied into a temp folder by IIS Worker: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\dotnetnuke\
    • Right Click –> Edit Assembly Attributes (C#) –> Compile, then File –> Save Module

    Debugging

    • Debug –> Attach Process
    • Find executable (w2wp.exe) and then modules (*.dll)
    • Then should be able to send requests and intercept using the debugger

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