Best way to add a large block of data into a file to patch it?

[tonyweb]

Why can't you change the code of the unused function to actually patch the 0 you're interested into 1 in the *original* license area? I think this is a cleaner way.

If finding the position of the "flags" to put to 1 is "complex" you could follow the suggestion by @h4sh3m / @ionioni / @Ahmadmansoor ... dll injection/hijacking, and code your own dll to which you can pass the address of the license data to patch.

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If you still want to use the hard-coded section, I agree with @Kurapica : check for section location/alignment and permissions.

My idea is that c0000374 error happens because the application, once used the license data (probably in a dinamically allocated area), tries to free it and, because your data is not dynamically created/not on the heap, it fails to do so. Just find the "free()" call and NOP it

Best Regards,
Tony