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stefkeh
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 Posted: Tue Sep 26, 2006 10:22 am Post subject: Auto-assembler question |
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Hello,
I'm working on a script in AA
but i'm having a prob...
im looking for a way to change a register
at a certain addres without changing the code..
let say the adress is 00400567 and it is
jne 00600000
and i want to change the eip of that adress to 00600005
is that possible ?
thanks in advance
Stefkeh
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Dark Byte
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| Posted: Tue Sep 26, 2006 11:26 am Post subject: |
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not possible with a aa script. (a aa script can only edit memory, so if the reason is that you can't edit the memory because of a crc check, then first disable the crc check with a aa script)
you have to rightclick that instruction and choose change reg on bp and change eip to 00600005
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stefkeh
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| Posted: Tue Sep 26, 2006 12:15 pm Post subject: |
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ooh ic.. thanks DB !
i guess its not possible that youre going to tell how
i do the crc bypass  can you give my something
to start from ?
thanks in advance
Stefkeh
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richie86
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| Posted: Tue Sep 26, 2006 12:47 pm Post subject: |
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| stefkeh wrote: | ooh ic.. thanks DB !
i guess its not possible that youre going to tell how
i do the crc bypass can you give my something
to start from ?
thanks in advance
Stefkeh |
first of all you have to find out where the crc routine in the memory.. to be easy let say the address
4001C5 jne 400300
add 4001C5 to table
find what access at 4001C5, then go into memory view, change jne 400300 to je 400300, you will get dc (if you playing some game that dc when you modify thier memory directly), and you will have some address which triggered with that, that the crc routine that found out you change jne to something else. then try look around that code and start your journey.
to get it work you have to know how crc work and how to disable them.
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stefkeh
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| Posted: Tue Sep 26, 2006 1:04 pm Post subject: |
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thank u verry much !!
grtz Stefkeh
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