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chenyyhua
How do I cheat?
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Joined: 15 Oct 2005
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 Posted: Tue Mar 18, 2008 10:18 am Post subject: How to accomplish NOPing in ASM ? |
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| Hi, people i saw many post about NOPing JNZ or JE in ASM to bypass the hack or cheat, how to accomplist this?? currently i am learning how to bypass Xtrap, its the gg of Cabal and many other MMORPG. I view the game.exe in ollydbg, and i saw the Xtrap dll, and there are ASM lines like Test, JE and JNZ, is that possible to NOPing those ASM line to skip triggering the xtrap while i click Xtrap?? or just disable it ? Can i just deleted those line to by pass it? ? If any expert here can help and teach me will beappreciated!!
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24653187
Expert Cheater
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Joined: 19 Aug 2007
Posts: 214
Location: 218.255.97.194/61.18.170.???
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| Posted: Tue Mar 18, 2008 11:09 am Post subject: Re: How to accomplish NOPing in ASM ? |
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| chenyyhua wrote: | | Hi, people i saw many post about NOPing JNZ or JE in ASM to bypass the hack or cheat, how to accomplist this?? currently i am learning how to bypass Xtrap, its the gg of Cabal and many other MMORPG. I view the game.exe in ollydbg, and i saw the Xtrap dll, and there are ASM lines like Test, JE and JNZ, is that possible to NOPing those ASM line to skip triggering the xtrap while i click Xtrap?? or just disable it ? Can i just deleted those line to by pass it? ? If any expert here can help and teach me will beappreciated!! |
you should post it to Anti-cheat bypassing forum.
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Labyrnth
Moderator
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| Posted: Tue Mar 18, 2008 11:29 am Post subject: Re: How to accomplish NOPing in ASM ? |
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| chenyyhua wrote: | | Hi, people i saw many post about NOPing JNZ or JE in ASM to bypass the hack or cheat, how to accomplist this?? currently i am learning how to bypass Xtrap, its the gg of Cabal and many other MMORPG. I view the game.exe in ollydbg, and i saw the Xtrap dll, and there are ASM lines like Test, JE and JNZ, is that possible to NOPing those ASM line to skip triggering the xtrap while i click Xtrap?? or just disable it ? Can i just deleted those line to by pass it? ? If any expert here can help and teach me will beappreciated!! |
Yes, or you can just reverse it.
JE = Jump if Equal, So change to JNE Jump if not Equal
I think olly will change that to a JNZ which will work as well.
But to nop it, you edit the bytes of the instruction to 90.
Example:
0040029B 74 00 je 0040029d
You can change 74 to 75 which is about the same as JE to JNE or JNZ.
Or to nop it.
0040029B 90 nop
0040029C 90 nop
Because: 0040029B bytes are 74 and 0040029C bytes are 00
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