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c++cwindowsdll-injection

Grabbing memory from another process

in Windows, lets say I have used DLL Injection to get into another process. I have also done some screencaptures of the memory on the process I have injected into and know the location of the data I want to pull out. Lets say there is data in the other process at 0xaaaaaaaa that contains a certain value. How do I grab this value from that process so I can use it in my injecting app? Since I am injected into the process, can I just use something like memcpy?

memcpy(value, 0xaaaaaaaa, 10);

I'm assuming it's probably more involved than this?

EDIT: To the responses below, I don't see how WM_COPYDATA helps me as it is for sending data to another application, not for retrieving data FROM an existing application.

Solution

  • You should be able to use the ReadProcessMemory function.

    See also How to write a Perl, Python, or Ruby program to change the memory of another process on Windows?