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[Help]Code Cave problems

 
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Somen00b2
How do I cheat?
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Joined: 09 Feb 2008
Posts: 3
PostPosted: Sat Feb 09, 2008 4:20 pm    Post subject: [Help]Code Cave problems Reply with quote
Hey CE players.

I've been having the weirdest problem with my ASM code cave.

let me lay it out with my original code and how I set up my code cave.

Code:

//original no jumps....
JE      009000F6
MOV     EDX, DWORD PTR [EDX+5C]
MOV     DWORD PTR [EBP-4], EDX
MOV     ECX, DWORD PTR [ECX+1C0]


Code:
Here's my code cave that I end up with
//As you can see I'm trying to get inside the pointer "[EDX+5C]"
JE      009000F6
MOV    DWORD PTR [EDX+5C], 0x00000
MOV     EDX, DWORD PTR [EDX+5C]
MOV     DWORD PTR [EBP-4], EDX
MOV     ECX, DWORD PTR [ECX+1C0]
jmp 009000FC


Thing is I keep crashing like mad, when I try to access this function.

Any help would be great.

Thanks,
-Somen00b2
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Labyrnth
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PostPosted: Sat Feb 09, 2008 4:33 pm    Post subject: Reply with quote
Cant really tell what your doing by this.

crashing because.....

1. Left over bytes in original flow of the code.
2. The cave is not large enough or being used by some other part of the game.
3. Your not jumping back to the right location in the flow of the original code.
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Somen00b2
How do I cheat?
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Joined: 09 Feb 2008
Posts: 3
PostPosted: Sat Feb 09, 2008 5:58 pm    Post subject: Reply with quote
Well can you tell me this... How I have it set up in the code cave.. Is that the correct way?
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Labyrnth
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PostPosted: Sat Feb 09, 2008 6:19 pm    Post subject: Reply with quote
No your not, Because that jmp you are writing after the original code is over writing bytes of valuable code.

Here is the order you need to do it.
Code:

label(back)
* Code cave address
*What your writing to the cave
jmp back

*Original address
jmp *code cave address
nop  <-- may need more then one to clean up the left over bytes.
back:


jmp 009000FC
Also i do not think this is a cave, since it is only 6 address away from the original JE 009000F6




Here is all i can do with what you have provided, I cannot test it.
Plus you never said what game this is.
Code:

[ENABLE]
label(back)

*Code Cave Address:
MOV DWORD PTR [EDX+5C],0x00000
MOV EDX,DWORD PTR [EDX+5C]
jmp back

*Original address:
jmp *Code cave Address
nop
back:

[DISABLE]
*Original Address:
MOV EDX,DWORD PTR [EDX+5C]


Last edited by Labyrnth on Sat Feb 09, 2008 6:33 pm; edited 3 times in total
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hcavolsdsadgadsg
I'm a spammer
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Joined: 11 Jun 2007
Posts: 5801
PostPosted: Sat Feb 09, 2008 6:30 pm    Post subject: Re: [Help]Code Cave problems Reply with quote
Somen00b2 wrote:
Hey CE players.

I've been having the weirdest problem with my ASM code cave.

let me lay it out with my original code and how I set up my code cave.

Code:

//original no jumps....
JE      009000F6
MOV     EDX, DWORD PTR [EDX+5C]
MOV     DWORD PTR [EBP-4], EDX
MOV     ECX, DWORD PTR [ECX+1C0]


Code:
Here's my code cave that I end up with
//As you can see I'm trying to get inside the pointer "[EDX+5C]"
JE      009000F6
MOV    DWORD PTR [EDX+5C], 0x00000
MOV     EDX, DWORD PTR [EDX+5C]
MOV     DWORD PTR [EBP-4], EDX
MOV     ECX, DWORD PTR [ECX+1C0]
jmp 009000FC


Thing is I keep crashing like mad, when I try to access this function.

Any help would be great.

Thanks,
-Somen00b2


You're trying to write your own stuff BEFORE going to a cave and doing it. Remember when you jump to your cave, to restore whatever you destroyed to make the jump first, THEN carry on to your own stuff, THEN jump back.

Use the code cave scanner in the memory searcher and find a nice big space that you can write to.


edit: and that's what I get for not reading the entire topic. Confused
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Labyrnth
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PostPosted: Sat Feb 09, 2008 6:35 pm    Post subject: Re: [Help]Code Cave problems Reply with quote
slovach wrote:

edit: and that's what I get for not reading the entire topic. Confused


Not really it still can help. Razz
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Somen00b2
How do I cheat?
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Joined: 09 Feb 2008
Posts: 3
PostPosted: Sat Feb 09, 2008 8:35 pm    Post subject: Reply with quote
I've found the problem.

simple fix.... Don't use premade apps to do your Code Caves Confused .....

Thanks for your time though.
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Labyrnth
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PostPosted: Sat Feb 09, 2008 8:38 pm    Post subject: Reply with quote
Huh?
Man you can use CE to get you a cave, or ollydbg.
There are some more code cave tools that work as well.
But ollydbg and or CE i would use.
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