VMProtect Software » Forum

In my program VMProtectIsValidImageCRC is returning false after the file is protected sometimes changing some protection settings makes it work again. I don't know how to send you a sample since my program is a plug-in and on smaller test cases it is fine. Also in my plug-in initialization the function works correctly and doesn't trigger. This makes me the that the VMProtectIsValidImageCRC is working fine and that my plug-in is actually changing code what do you think can cause this? Would VMProtectDecryptStringA trigger this? I am changing a global array can this cause it? Or maybe VM is changing? I'm at a loss as to why it thinks the image has changed.

We need more information to reproduce the problem, so please send your plugin with all necessary information to info@vmpsoft.com, so we can take a look.

Also you may try to disable all other plugins, so your one will run alone. If this fix the problem, it seems that other plugins may damage memory somehow.

Thanks for your reply i will try your suggestion and get back to you.

Its not feasible to send you my plugin but i have narrowed down the problem. On small samples it is fine but with my program its definitely VMDecryptStringA and only happens after the string has been accessed and only when the string protection level is set to mutation, with higher settings everything is fine. Any suggestions?

I have successfully replicated the problem in a small sample. I sent you the sample with source code to your email it seems somehow Getting the serial state causes problems with mutated strings or something.

Please, check your e-mail.