How to update AOB script when the functions are changed?

Memory scanning, code injection, debugger internals and other gamemodding related discussion
Post Reply
marek1957
Expert Cheater
Expert Cheater
Posts: 283
Joined: Sat Dec 16, 2017 4:46 pm
Reputation: 4

How to update AOB script when the functions are changed?

Post by marek1957 » Mon Mar 26, 2018 11:13 am

Hello Smart People!🤗
I have question about - how to update aob script when the functions are changed? - how then update script?🤔
I have one script and I found 100% correct memory region of the script but in new version of the game, the address where the script should be activated - has totally different functions but the rest memory region is 100% correct.

Is it possible to update such a script? or I must hack game once again?



Image Image

marek1957
Expert Cheater
Expert Cheater
Posts: 283
Joined: Sat Dec 16, 2017 4:46 pm
Reputation: 4

Re: How to update AOB script when the functions are changed?

Post by marek1957 » Mon Mar 26, 2018 11:35 am

For [edx+3A4] I was doing something like that:

Image

Memory region for SHOOT doesn't change at all. Only in TARGET memory region functions are changed and now I don't know what to do to make this script works again.

If I follow the CALL in the NEW MEMORY REGION I have something like this:

Image

If I follow the next call at E8 80 00 00 00, then I have something like this:

Image

So how to update that script?

User avatar
Renardo La Moustache
Novice Cheater
Novice Cheater
Posts: 20
Joined: Sun Mar 11, 2018 2:19 pm
Reputation: 0

Re: How to update AOB script when the functions are changed?

Post by Renardo La Moustache » Sun Apr 01, 2018 1:18 pm

nope this call or put a ret on the push ebp . maybe

Edit : never mind, some screenshot where not loaded when i answered. just ignore this :lol:

User avatar
SunBeam
Trouble Makers
Trouble Makers
Posts: 1568
Joined: Sun Feb 04, 2018 7:16 pm
Reputation: 258

Re: How to update AOB script when the functions are changed?

Post by SunBeam » Mon Apr 02, 2018 9:29 am

As long as the function doesn't change ASM shape between updates, you can rely on an AOB. Else - as seen in Dishonored 2 with major function cosmetics - you will have to find it again. One way I'd recommend to do it is - and this submits again to the same idea I started this reply with - finding one or all references to your function (open DLL in a debugger) and AOB those instead ;)

Example:

141000000:
push rbp
mov rbp,rsp
..
..
pop rbp
ret

Let's say the above is your function. And it's located at address 141000000. By finding all references to it you will encounter lots of "CALL 141000000" or "JMP 141000000". What you can then do - if the code around these CALLs/JMPs doesn't change - is AOB them to get to them. Then is only a matter of going inside the CALL or following the JMP to get to your function ;) This also works if the function at 141000000 changes its ASM form.

BR,
Sun

Post Reply

Who is online

Users browsing this forum: No registered users