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Need help with ASM

 
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Gaz
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Joined: 08 Aug 2012
Posts: 40
PostPosted: Sun Oct 21, 2012 1:34 pm    Post subject: Need help with ASM Reply with quote
I need to change 2 values in order to affect one

in order for it to affect super acuracy i need change the
movss [esi+00000120],xmm1 to movss [esi+00000120],xmm2
and the cmp byte ptr [esi+0000016C],00 to cmp byte ptr [esi+0000016C],02

If anyone could post the code needed to make these in one code injection id love you thanks[/img]

bandicam 2012-10-21 20-38-55-165.jpg
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bandicam 2012-10-21 20-38-55-165.jpg
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SteveAndrew
Master Cheater
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Joined: 02 Sep 2012
Posts: 323
PostPosted: Fri Oct 26, 2012 4:57 pm    Post subject: Reply with quote
Okay this is simple enough... You don't even have to do any allocating and redirecting the code flow as your only changing a single byte in each of the two instructions you are changing! Nice Wink

I really wish you would've had the address column expanded just a tiny bit more but I don't think I'm missing a hex digit so its all good it was just a little cluttered that's all Very Happy

Oh and I wasn't 100% sure about the exe name either, but it looks like bf3.exe... Battle Field 3 ? lol just a guess...

Code:

[enable]

bf3.exe+4d5538:
cmp byte ptr [esi+16c],2

bf3.exe+4d557a:
movss [esi+120],xmm2

[disable]

bf3.exe+4d5538:
cmp byte ptr [esi+16c],0

bf3.exe+4d557a:
movss [esi+120],xmm1


Or to be pro at it do this:
Code:

[enable]

bf3.exe+4d553e:
db 02

bf3.exe+4d557d:
db 96

[disable]

bf3.exe+4d553e:
db 00

bf3.exe+4d557d:
db 8e


See since we only need to change a single byte, we can just define the byte we are changing... You can see the image I attached to see what I mean...

In the first instruction, the 7th byte is the one we need to change (as shown in the attached image)

So since we're already at the first byte add 6 to 4d5538 and you get 4d553e

The next one, the 4th byte is changed so we add 3 to 4d557a and get 4d557d

Very Happy Hope I helped! Very Happy

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Gaz
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Joined: 08 Aug 2012
Posts: 40
PostPosted: Sun Oct 28, 2012 12:36 pm    Post subject: Reply with quote
Thanks a ton bro that really helped my assembly isn't up to scratch yeah its bf3 and I noticed that no spread was bug and I had to reverse a je to jne and then change an xmm value !!! Do you have skype bro? Would like to chat to you more since you know ur shit and I'm always needing help
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