Error 0xc000007b When trying to inject a DLL with detours

Question

Error 0xc000007b When trying to inject a DLL with detours

I'm trying to inject a DLL to a new process using the latests 32 bit Detours library.

http://research.microsoft.com/en-us/projects/detours/

It worked for me in the past but after a change in the DLL, it stopped working for all processes. When I resume the process I get a message box saying

The application was unable to start correctly (0xc000007b). Click OK to close the application.

I've recreated this with a plain and empty DLL injected that has no dependencies other than kernel32.dll. With other executables it works perfectly.

Any idea why this can happen?

windows

code-injection

32-bit

detours

asked on Stack Overflow Oct 7, 2013 by

shoosh • edited Oct 7, 2013 by

shoosh

2 Answers

It turned out that the problem was the the DLL I was injecting using Detours did have any exports. Once I added a dummy export, everything worked perfectly.

answered on Stack Overflow Oct 7, 2013 by

shoosh

I don't know what the documentation looked like at the time you encountered this but based on a dummy export apparently working around the problem and the current documentation, you probably missed some requirements stated in Detouring 32-bit and 64-bit Processes. Unfortunately it says to do things without explaining how the pieces fit together.

Detours expects your helper DLL to export DetourFinishHelperProcess with ordinal 1. This isn't a function you define yourself. It will get compiled into your DLL as a result of calling DetourIsHelperProcess in your DllMain function as shown in the Using Detours sample.

answered on Stack Overflow Sep 18, 2020 by

jeff krueger

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