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Thread: ollydbg help

  1. #1

    ollydbg help

    Hi,
    I want to patch an exe with olly, I open the exe, dbclick the line and enter the value I want, I right click and 'copy to exe' then on the new window rightclick and save but it pops save mscore.dll, try to save mscore but denies access, how can I patch the data and remain to exe and save the exe to disk?

    Ty
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  2. #2
    Naides is Nobody
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    Seems to me that the file you are trying to patch is a .NET executable (Right??)

    A good deal of the true executable code of .NET is actually run by a System file called mscore.dll, which is a system library. If you did modify it (provaided you could) it would change the behavior and likely crash ALL .NET executables.

    .NET apps patching is a different game, rather advanced by the way; thus Ollydbg tracing and patching is not the way to go.

  3. #3
    thank you naides, you're right it is a .NET application, any good dissasembler debugger for Net? I heard of IL spy.
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  4. #4
    Registered User
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    try Reflector+Reflexil Plugin.

  5. #5
    I tend to run .NET assemblies through de4dot if they're obfuscated, which usually restores them to the point where the code at least compiles. Then I extract the source files with ILSpy (free alternative for reflector) and open them up in Visual Studio. There I can freely debug, analyze, edit or recompile the program.

    x86 debuggers like OllyDbg are for x86 instructions, not MSIL.
    I promise that I have read the FAQ and tried to use the Search to answer my question.

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