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Cheat Engine
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applepi
Newbie cheater
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Joined: 10 Dec 2006
Posts: 21
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 Posted: Sat Apr 14, 2007 9:33 am Post subject: [HELP] Step 7 in Cheatengine Tutorial |
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| Quote: | Code injection is a technique where one injects a piece of code into the target process, and then reroute the
execution of code to go through your own written code
In this tutorial you'll have a health value and a button that will decrease your health with 1 each time you click it.
Your task is to use code injection to increase the value of your health with 2 every time it is clicked
Start with finding the address and then find what writes to it.
then when you've found the code that decreases it browse to that address in the disassembler, and open the auto
assembler window (ctrl+a)
There click on template and then code injection, and give it the address that decreases health (If it isn't already filled
in correctly)
That'll generate a basic auto assembler injection framework you can use for your code.
Notice the alloc, that'll allocate a block of memory for your code cave, in the past, in the pre windows 2000 systems,
people had to find code caves in the memory(regiosn of memory unusaed by the game), but thats luckely a thing f
the past since windows 2000, and will these days cause errors when trying to be used, due to SP2 of XP and the NX
bit of new CPU's
Also notice the line newmem: and originalcode: and the text "Place your code here"
As you guessed it, write your code here that will increase the health with 2.
a usefull assembnler instruction in this case is the "ADD instruction"
here are a few examples:
"ADD [00901234],9" to increase the address at 00901234 with 9
"ADD [ESP+4],9" to increase the address pointed to by ESP+4 with 9
In this case, you'll have to use the same thing between the brackets as the original code has that decreases your
health
Notice:
It is recommended to delete the line that decreases your health from the original code section, else you'll have to
increase your health with 3 (you increase with 3, the original code decreases with 1, so the end result is increase
with 2), which might become confusing. But it's all up to you and your programming.
Notice 2:
In some games the original code can exist out of multiple instructions, and sometimes, not always, it might happen
that a code at another place jumps into your jump instruction end will then cause unknown behaviour. If that
happens, you should usually look near that instruction and see the jumps and fix it, or perhaps even choose to use a
different address to do the code injection from. As long as you're able to figure out the address to change from inside
your injected code.
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I really need help with the part that tells you to | Quote: | Also notice the line newmem: and originalcode: and the text "Place your code here"
As you guessed it, write your code here that will increase the health with 2. |
I don't know what to write and I don't know what my code is to increase the health with 2. I don't kno what to write to make the value increase by 2, it only decreases into negative oblivion! Please help me! Thanks.
P.S. I tried searching the forum for help on Step 7, but no luck, I found Step 8 which I will surely use after I pass Step 7!
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Labyrnth
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Joined: 28 Nov 2006
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| Posted: Sat Apr 14, 2007 10:34 am Post subject: |
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| Tutorial section has some, This is not the right thread for this..
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applepi
Newbie cheater
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Joined: 10 Dec 2006
Posts: 21
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| Posted: Sat Apr 14, 2007 11:22 am Post subject: |
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| No it does not have a tutorial explaining Step 7. If you can help, please do an not just redirect me to someone who can. However if you can't then.. you have no need to involve yourself. Thank you!
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Labyrnth
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Joined: 28 Nov 2006
Posts: 6301
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