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Requesting help with AA // Code Caving

 
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SalvationD
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Joined: 26 Jun 2006
Posts: 148

PostPosted: Fri Aug 29, 2008 1:24 pm    Post subject: Requesting help with AA // Code Caving Reply with quote

Alright so I'm looking at Rohan, there's a few hacks that can be done in Ollydbg, and are being done, but I don't know how to bypass the hack protection using Ollydbg (straight up in the .exe) so using an UCE, can someone tell me how I would go about adding a few things into a script.

For example it's wrote:

To Start Code Cave
Do THIS b4 anythin else

Go to 00426DF0 and change the command to RETN.

Now highlight and select from address 00426DF1 to 00426F69, right click, Binary -> Fill with NOPs.

AND I also wanna do..

PART of what is suppose to go in the code cave goes like this
Go to 00426E04 and put:
MOV EDX,DWORD PTR DS:[0AF32E4]
MOV EAX,DWORD PTR DS:[0AF32E0]
PUSH EDX
PUSH EAX

go to the address 00410775 you should see this:
MOVZX EAX,BYTE PTR SS:[ESP+A9]

Change the code at 00410775 to CALL 00426DF2 .

Go to 00426DF2 and write this code:

MOV BYTE PTR SS:[ESP+0A9],0FA
MOVZX EAX,BYTE PTR SS:[ESP+0A9]
RETN

bypass the cus filter

Change code at 004D29EC to JMP SHORT 004D2A0A .


Since I can open Rohan and play it., how in the world would I actually inject those or assemble those in Rohan while the game is going (Using Cheat Engine)? I know Maplestory use to do a vac with some code caving, but I need some noob guidance here, please Smile
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sponge
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Joined: 07 Nov 2006
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PostPosted: Fri Aug 29, 2008 6:28 pm    Post subject: Reply with quote

Code:
[enable]
00426DF0:
retn
nop the rest
[disable]
original command

Code:
[enable]
426df1:
dd 90909090 //copy this line and make sure there are 94 lines of dd 90909090
[disable]
// so big that just restart to restore it


Code:
[enable]
426e04:
MOV EDX,[0AF32E4]
MOV EAX,[0AF32E0]
PUSH EDX
PUSH EAX

00410775:
call 00426df2

00426df2:
MOV [ESP+0A9],0FA
MOVZX EAX,[ESP+0A9]
RETN

[disable]
//ill leave you to do the disabling.

Code:
[enable]
004D29EC:
JMP 004D2A0A 
[disable]
// same thing.

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