Cheat Engine

[spook202]

Hi guys,

I'mlooking for some advice with pointers with the game Payday : The Heist.

My first step is to get unlimited ammo.
I followed the tutorial built into cheat engine and while the multi level pointer tut was successful for many games, it hit a dead end with this one.

Normally I would find the address for the ammo using the normal methods. Find what writes to this address *fire gun* and it gives one result.
Eg mov [esi], Esx
The value in esi is 111111 for talking sake.
Do a hex search for 111111 then get a hit, find what accesses this address and rinse repeat until you hit base.

Now, with payday, once you find what writes to your ammo address,
Eg mov [esi], esx
And esi has value 111111, if you do a hex search for 111111 you get no hits, or you get a hit that quickly changes value and no longer seems like a valid pointer (just contains 000000).

The method above has worked for many games but I can't seem to figure out what's going on with this one.
Has anyone seen anything like this before???
Totally stumped.

<<<<<<<<<<<<<<EDIT>>>>>>>>>>>>>>

After reading some further forum posts, some people are having the same issue, all be it; different games.

Now, if 'Find what writes to this address' it will pop with

MOV [ESI],ECX

If I open in dis it gives this:

mov eax,[esp+24]
mov ecx,[eax]
mov [esi],ecx <<<<<<<< CODE POPPED HERE
mov edx,[eax+04]
mov [esi+04],edx
cmp dword ptr [eax+04],04

At the point the code popped the following values were:
EAX=06BED858
EBX=00B90300
ECX=42440000
EDX=00000004
ESI=33541B30
EDI=1D202918
ESP=0018F698
EBP=32A10280
EIP=00794D61

Hope this helps,

Thanks.

Cheers.

[spook202]

Any ideas guys?

[Fresco]

http://forum.cheatengine.org/viewtopic.php?t=552974

read here and post here any other question.

[spook202]

Thanks for the reply Fresco.
I had already read that article which made perfect sense but it seems i have hit another hurdle.
This particular game seems to have some sort of protection.
At first when i attached a debugger it always crashed.
After some searching i managed to find a DLL to inject into steam to allow me to attach a debugger which works fine.

Now a new problem has arisen. When i try to change any code even if it is just a NOP the game will crash.
I thought it may be some sort of integrity check so i tried using the stealthedit plugin for cheat engine:
www[dot].szemelyesintegracio.hu/cheats/41-game-hacking-articles/419-stealthedit

and although it copies the code (as indicated by the green addresses) it will still crash when i edit anything (even if i am changing the copy of the code; not the original).

The game is made by OverKill Software and published by Sony Online.
I have searched a fair bit but cant find any mention of any sort of integrity checks or protection.

The game is fairly new but trainers are already on the market from cheathappens and lingon.

Any ideas?

Thanks again for the reply.