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ArdiCamarada
How do I cheat?
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Joined: 22 Feb 2023
Posts: 7
Location: Spain
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 Posted: Wed Feb 22, 2023 9:06 am Post subject: Integer variables have weird values |
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Im hacking a game where the values seem to have been mangled for some reason. For example:
0 is 11622982758321214820
5 is 7337589450990942497
etc
My best guess is that there is some kind of intentional obfuscation.
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Xx XoTiC V1 xX
Cheater
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Joined: 03 Aug 2012
Posts: 43
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| Posted: Wed Feb 22, 2023 9:45 am Post subject: Re: Integer variables have weird values |
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| ArdiCamarada wrote: | Im hacking a game where the values seem to have been mangled for some reason. For example:
0 is 11622982758321214820
5 is 7337589450990942497
etc
My best guess is that there is some kind of intentional obfuscation. |
More than likely encryption, if you see any XORs when looking in the disassembler then chances are there's some encryption going on, even if you don't see any XORs it still could be encrypted but some game code just works differently then what you may usually see. I haven't studied all opcode instructions but you need to trace and find where the value is BEFORE it gets encrypted if that is what's going on, there's tutorials to learn about breaking and tracing for encrypted values
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Learning as I go. |
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ArdiCamarada
How do I cheat?
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Joined: 22 Feb 2023
Posts: 7
Location: Spain
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| Posted: Wed Feb 22, 2023 11:41 am Post subject: |
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It could very well be that the game logic was running in some sort of interpreter, like python does.
Try looking for the x value in this code with cheat engine, it won't work.
| Code: |
x = 0
while True:
# wait for user input
x += 1
input(x)
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Dark Byte
Site Admin
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Joined: 09 May 2003
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Location: The netherlands
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| Posted: Wed Feb 22, 2023 2:35 pm Post subject: |
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can you change the value?
E.g. the current value is 0, and you scan for 11622982758321214820 and then change it to 7337589450990942497 , it changes to 5 ?
if not, then you only found a display value. Perhaps it's even part of a string instead of the actual value
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ArdiCamarada
How do I cheat?
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Joined: 22 Feb 2023
Posts: 7
Location: Spain
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| Posted: Wed Feb 22, 2023 5:27 pm Post subject: |
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Yes, I found the true value.
When I inspect the memory only those 8 bytes change.
Browsing what accesses that memory so I can undo the encryption (xor encryption is really easy to undo haha) is tough because attaching a debugger crashes the game immediately and activating the dbvm crashes the game after 5 minutes or so. (even with CE off).
I'm just exploring my options. Maybe they use an interpreter like python for the game logic, maybe they encript their variables, maybe something else I don't know.
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Xx XoTiC V1 xX
Cheater
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Joined: 03 Aug 2012
Posts: 43
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| Posted: Thu Feb 23, 2023 2:26 pm Post subject: |
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| ArdiCamarada wrote: | Yes, I found the true value.
When I inspect the memory only those 8 bytes change.
Browsing what accesses that memory so I can undo the encryption (xor encryption is really easy to undo haha) is tough because attaching a debugger crashes the game immediately and activating the dbvm crashes the game after 5 minutes or so. (even with CE off).
I'm just exploring my options. Maybe they use an interpreter like python for the game logic, maybe they encript their variables, maybe something else I don't know. |
It's either encryption or just how the memory works, I'm not very informed when it comes to interpreters but I have seen experiences of values just being huge and no signs of encryption or anything that would affect it, or just strings being loaded in. Whatever game developers want to do usually.
For the crashing part, there might be some kind of protection to the game you're working with you'd have to solve, there could also be integrity checks which the plugin stealthedit is very useful for getting around, unfortunately that plugin hasn't been updated in a decade so I doubt it works on new Cheat Engines. I think 6.3 or 6.7 somewhere around there I know it works on.
Integrity checks are basically like if you change any bit of opcode that has a check going through it the game will instantly crash. There is ways around that I just don't remember options 100%, think a code cave was one solution.
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Learning as I go. |
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