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[C++]Three-level Pointer

 
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Special11
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PostPosted: Sun Feb 07, 2010 3:28 pm    Post subject: [C++]Three-level Pointer Reply with quote
Hi all, can someone tell me what i'm doing wrong?
I'm reading value of pointer and adding offset to it three times but it doesn't work like this pointer in Cheat Engine.

Code:

DWORD oneLevel;
DWORD oneOffset;
DWORD twoLevel;
DWORD twoOffset;
DWORD threeLevel;
DWORD threeOffset;
DWORD BaseAddress = GetModuleBase("TLoader.exe",proc_id);

   ReadProcessMemory(hProcess, (void*)(BaseAddress + 0x26767C), &oneLevel, sizeof(oneLevel), &bytes);
   ReadProcessMemory(hProcess, (void*)(oneLevel + 0x598), &oneOffset, sizeof(oneOffset), &bytes);
   ReadProcessMemory(hProcess, (void*)oneOffset, &twoLevel, sizeof(twoLevel), &bytes);
   ReadProcessMemory(hProcess, (void*)(twoLevel + 0x1EC), &twoOffset, sizeof(twoOffset), &bytes);
   ReadProcessMemory(hProcess, (void*)twoOffset, &threeLevel, sizeof(threeLevel), &bytes);
   ReadProcessMemory(hProcess, (void*)(threeLevel + 0x9F2), &threeOffset, sizeof(threeOffset), &bytes);

   WriteProcessMemory(hProcess, (void*)threeOffset, (LPCVOID)16550, sizeof(int), &bytes);
[/code]

3levelpointer.png
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3-Level Pointer in Cheat Engine
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Dark Byte
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PostPosted: Sun Feb 07, 2010 3:37 pm    Post subject: Reply with quote
you can actually do this in a lot less instructions

anyhow, quickly reading through your code I'd say "WriteProcessMemory(hProcess, (void*)threeOffset, (LPCVOID)16550, sizeof(int), &bytes); " is wrong
it means you're writing the value stored at address 16550 in your process to the address of the pointer.

I suggest giving the address of an initialized variable that holds the value instead
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Special11
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PostPosted: Sun Feb 07, 2010 3:59 pm    Post subject: Reply with quote
You mean this?
I don't understand what i need to do :/

Code:

        unsigned int speed = 16550;
   DWORD bytes;

   DWORD oneLevel;
   DWORD oneOffset;
   DWORD twoLevel;
   DWORD twoOffset;
   DWORD threeLevel;
   DWORD threeOffset;

   DWORD BaseAddress = GetModuleBase("TLoader.exe",proc_id);

   ReadProcessMemory(hProcess, (void*)(BaseAddress + 0x26767C), &oneLevel, sizeof(oneLevel), &bytes);
   ReadProcessMemory(hProcess, (void*)(oneLevel + 0x598), &oneOffset, sizeof(oneOffset), &bytes);
   ReadProcessMemory(hProcess, (void*)oneOffset, &twoLevel, sizeof(twoLevel), &bytes);
   ReadProcessMemory(hProcess, (void*)(twoLevel + 0x1EC), &twoOffset, sizeof(twoOffset), &bytes);
   ReadProcessMemory(hProcess, (void*)twoOffset, &threeLevel, sizeof(threeLevel), &bytes);
   ReadProcessMemory(hProcess, (void*)(threeLevel + 0x9F2), &threeOffset, sizeof(threeOffset), &bytes);

   WriteProcessMemory(hProcess, (void*)threeOffset, &speed, sizeof(speed), &bytes);
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zirak
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PostPosted: Thu Feb 11, 2010 6:41 pm    Post subject: Reply with quote
Or you can do this
Code:
   DWORD thefirst = (DWORD)(*(DWORD*)0x0040014F + 0x1378);
   DWORD thesecond = (DWORD)(*(DWORD*)thefirst + 0x18);
   DWORD thethird = (DWORD)(*(DWORD*)thesecond + 0x974);
   DWORD theresult = (DWORD)(*(DWORD*)thethird + 0x2B4C);


That's just an example, but that works too.
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FullyAwesome
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PostPosted: Thu Feb 11, 2010 11:40 pm    Post subject: Reply with quote
zirak wrote:
Or you can do this
Code:
   DWORD thefirst = (DWORD)(*(DWORD*)0x0040014F + 0x1378);
   DWORD thesecond = (DWORD)(*(DWORD*)thefirst + 0x18);
   DWORD thethird = (DWORD)(*(DWORD*)thesecond + 0x974);
   DWORD theresult = (DWORD)(*(DWORD*)thethird + 0x2B4C);


That's just an example, but that works too.


that's assuming he's sharing the memory space of the other program. also, good bump. Laughing
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Special11
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PostPosted: Sun Feb 14, 2010 2:33 pm    Post subject: Reply with quote
I tried this code:

Code:

DWORD Base = GetModuleBase("TLoader.exe",proc_id);

   DWORD thefirst = (DWORD)(*(DWORD*)Base + 0x26767C);
   DWORD thesecond = (DWORD)(*(DWORD*)thefirst + 0x598);
   DWORD thethird = (DWORD)(*(DWORD*)thesecond + 0x1EC);
   DWORD theresult = (DWORD)(*(DWORD*)thethird + 0x9F2);


But when i'm writing memory application just crashes ;/

Code:

WriteProcessMemory(hProcess, (void*)theresult, (LPCVOID)16550, sizeof(int), NULL);

Or this, both crashes application:
Code:

unsigned long superspeed = 16550;
WriteProcessMemory(hProcess, (void*)theresult, &superspeed, sizeof(superspeed), NULL);


Can someone show me working code, or tell me what's wrong, please?
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Anden100
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PostPosted: Wed Feb 17, 2010 4:16 pm    Post subject: Reply with quote
I think you have quite a lot ReadProcessMemory calls, 3 should be enough i belive?

Code:
unsigned long superspeed = 16550;
DWORD buffer;
ReadProcessMemory(hProcess, (LPCVOID)(BaseAddress+0x26767C), &buffer, sizeof(buffer), NULL);
ReadProcessMemory(hProcess, (LPCVOID)(buffer+0x598), &buffer, sizeof(buffer), NULL);
ReadProcessMemory(hProcess, (LPCVOID)(buffer+0x1EC), &buffer, sizeof(buffer), NULL);
buffer+= 0x9F2;

WriteProcessMemory(hProcess, (LPCVOID)buffer, &superspeed, sizeof(superspeed), NULL);


If this doesen't work, try reading this:
http://forum.cheatengine.org/viewtopic.php?t=422516
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zirak
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PostPosted: Thu Feb 18, 2010 12:07 am    Post subject: Reply with quote
Special11 wrote:
I tried this code:

Code:

DWORD Base = GetModuleBase("TLoader.exe",proc_id);

   DWORD thefirst = (DWORD)(*(DWORD*)Base + 0x26767C);
   DWORD thesecond = (DWORD)(*(DWORD*)thefirst + 0x598);
   DWORD thethird = (DWORD)(*(DWORD*)thesecond + 0x1EC);
   DWORD theresult = (DWORD)(*(DWORD*)thethird + 0x9F2);


But when i'm writing memory application just crashes ;/

Code:

WriteProcessMemory(hProcess, (void*)theresult, (LPCVOID)16550, sizeof(int), NULL);

Or this, both crashes application:
Code:

unsigned long superspeed = 16550;
WriteProcessMemory(hProcess, (void*)theresult, &superspeed, sizeof(superspeed), NULL);


Can someone show me working code, or tell me what's wrong, please?


I just realized you're using hProcess? In any case is your trainer not a DLL? If it's not then that wouldn't work for you. I personally make DLL-based Trainers makes things easier for me Razz
Edit:
Nvm, that should work for you... dunno why it won't work considering you're telling it's the right exe. Try using CheatEngine to tell if that Multi-level pointer is actually valid. And if it exists when you're trying to write it to that pointer (by adding some extra checks)
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Special11
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PostPosted: Sat Feb 20, 2010 9:24 am    Post subject: Reply with quote
Already found a solution. Thx anyway
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