Cheat Engine

FireTube2010 · How do I cheat? Reputation: 0 Joined: 04 Sep 2010 Posts: 5

Gd evening gentlemen or ladies ,

Question:

Is it possible to detour the glBegin function to a code stub ?

For example from an external process I do virtualallocex then writeprocessmemory to write a stub/byte array
into the target process and redirect glBegin into that stub/byte array I just wrote ?

Ive been successful in redirecting glBegin by doing eathook in my exe, then after getting the offset,
use writeprocessmemory to change the offset value in opengl32.dll in the target process(hl.exe) .
But when it comes to the stub I get crash ...

So , Ive tried something like this but crash .

What I do wrong ?

tombana · Posted: Sat Sep 04, 2010 9:21 am Post subject:

Try changing the 'ret' in the stub to 'ret 4'

If that doesn't work I wouldn't know the solution, but what is the 'eathook' you are referring to? And what offset value in opengl32 are you changing?

FireTube2010 · How do I cheat? Reputation: 0 Joined: 04 Sep 2010 Posts: 5

Just the regular EAT hook . After get the offset do writeprocessmem to change the address in the target process rather than in my process ...

The offset of glBegin is 0x00001880 stored somewhere in OGL dll .
I just use EAT hooking to get the location where
it is and do writeprcomem to change it in the target .
I just change it to the offset of my stub .

Would it be something like this ?

TROLOLOLOLOLOLOLOLOLOLOLO · Posted: Sun Sep 05, 2010 12:46 am Post subject:

That looks like robot code O_O Mind explaining to me what it does?

FireTube2010 · How do I cheat? Reputation: 0 Joined: 04 Sep 2010 Posts: 5

TROLOLOLOLOLOLOLOLOLOLOLO · Posted: Sun Sep 05, 2010 3:28 am Post subject:

Say what?

justa_dude · Posted: Sun Sep 05, 2010 4:16 am Post subject:

I think you'd find it much easier to proxy the dll. Otherwise, pick five bytes in the glbegin prologue and replace them with an unconditional jump or call to your own code. Also, what does "crash" mean? What kind of crash you're having has significant impact on what kind of troubleshooting you need to be doing. Finally, write a simple opengl test application yourself for testing purposes. This will ensure that you're not getting anti-cheat protection snags.

Cheers,
adude

FireTube2010 · How do I cheat? Reputation: 0 Joined: 04 Sep 2010 Posts: 5

Dude check out the screenshot i attached .

YEEEEEEHHHHHHAAAAA ! "Hi-ho, VAC Ranger! Away!"

My eathook and stub had the probs .