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Change specific path in a game

 
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letmecheat
How do I cheat?
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PostPosted: Thu Mar 02, 2023 4:38 pm    Post subject: Change specific path in a game Reply with quote
I'm trying to change the path to the sound folder in the game's memory because I want to use a customized sound pack. The original sound folder is located in the root folder of the game (example: game\sound\shoot.wav), but I can't just replace it because of security reason, the game has protection against such behavior.
So, the only way that I see is modify path stored in the game’s memory.
After I scanned the game for string “sound” I was able to find several addresses but after I added them to my address list, I saw the they can randomly change after several minutes so I had to do scan again and again. This won’t work.
Later I read about pointers and was hoping to find pointers which would help me to find the entry point for my desirable changes, but after several tries, I found nothing.
Also I’ve notice that new sounds in the game could appears randomly in a random memory location after new game event happens and after event ends, garbage collector delete variable in a memory (path no longer exist after scanning).
I’m sure that somewhere should be a const with a path to sound folder which generates path for playing each sounds and I’m sure that it’s possible to change it, but I just can’t find where…
For now I’m looking for a new approach to solve my task and I hope someone could push me in a right way! Thanks in advanced!
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++METHOS
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PostPosted: Fri Mar 03, 2023 9:49 am    Post subject: Re: Change specific path in a game Reply with quote
letmecheat wrote:
but I can't just replace it because of security reason, the game has protection against such behavior.
So, the only way that I see is modify path stored in the game’s memory.
-I stopped reading after this. I think, if the game recognizes and rejects a different wav file of the same name, in the correct folder, then there is likely some type of data validation occurring through CRC or similar.

As such, I would look for that check and trick the program into believing that the result is good.
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letmecheat
How do I cheat?
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PostPosted: Fri Mar 03, 2023 2:42 pm    Post subject: Re: Change specific path in a game Reply with quote
++METHOS wrote:
letmecheat wrote:
but I can't just replace it because of security reason, the game has protection against such behavior.
So, the only way that I see is modify path stored in the game’s memory.
-I stopped reading after this. I think, if the game recognizes and rejects a different wav file of the same name, in the correct folder, then there is likely some type of data validation occurring through CRC or similar.

As such, I would look for that check and trick the program into believing that the result is good.


Thank you for your time!
Yeah, you are right, game has CRC check built-in but game monitoring only original folder and files inside, that's why I can't do anything there.
But, if I'm changing the path to .wav file in the game's memory to a different folder, game uses faked file without any issue. I already tested it, and it works, but it works only for several minutes (5…10 min) after that period some sort of randomizer used inside of a game and it change the addresses and it happens again and again, I'm sure it's an anti-cheat algorithm. And this anti-cheat algorithm works always, no matter if I'm changing the value of the path or not, it will change the address anyway after some time.
Sure, I can do re-scan again and do manually path modification again, but it's not a solution what I'm looking for. I need automation for this because in a game world can be a lot of objects which will generate new sounds and every sound will has his own path which I need to change.
I'm not sure, but what do you think is it possible to have a parallel process with a game which will do scanning each second and modify existing paths? I never done such things before.
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++METHOS
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PostPosted: Fri Mar 03, 2023 3:59 pm    Post subject: Reply with quote
All you should have to do is trick the program into thinking that the CRC check was valid. Or, completely jump over or nullify the entire scheme.

Regarding the changing of addresses, how are you changing the values? Are you using injection?
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