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flonghead
How do I cheat?
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Joined: 13 Apr 2020
Posts: 1
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 Posted: Mon Apr 13, 2020 10:38 am Post subject: Can someone tell me what this script is doing please? |
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Hi, I found a script on the internet and I am unsure how this is working, or what it is doing despite trying google (I know). It would be greatly appreciated to understand what values are being altered and how? thankyou so much! 
aobscanmodule(test40131,GameAssembly.dll,F2 0F 5C F0 66 0F 2E 73 2 // should be unique
alloc(newmem,$100,"GameAssembly.dll"+1C1B71)
label(code)
label(return)
newmem:
code:
//subsd xmm6,xmm0
addsd xmm6,xmm0
ucomisd xmm6,[rbx+28]
jmp return
test40131:
jmp newmem
nop
nop
nop
nop
return:
registersymbol(test40131)
_________________
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happyTugs
Cheater
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Joined: 23 Apr 2020
Posts: 26
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| Posted: Fri Apr 24, 2020 12:31 am Post subject: |
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It would be nice to know what the script is trying to achieve. Anyway, correct me if am wrong. | Code: | aobscanmodule(test40131,GameAssembly.dll,F2 0F 5C F0 66 0F 2E 73) //-- Scan for the bytes 'F2 0F 5C F0 66 0F 2E 73' in the module GameAssembly.dll and, if found, label the module address 'test40131'
alloc(newmem,$100,"GameAssembly.dll"+1C1B71) //-- Allocate memory (allocates near module address "GameAssembly.dll"+1C1B71 as jump distance could be bigger than 2GB)
/* By default, CE doesn't care if you label() your labels or not so long as it's not used outside of the script itself */
label(code) //-- Make a local symbol 'code'
label(return) //-- Make a local symbol 'return'
newmem:
code:
//subsd xmm6,xmm0 //-- Original code commented out perhaps?
addsd xmm6,xmm0 //-- Quite simply, add source operand (xmm0) to the destination operand (xmm6)
ucomisd xmm6,[rbx+28] //-- An unordered comparison is performed between xmm6 and the value contained in [rbx+28] and set flags in EFLAGS register
jmp return
test40131:
jmp newmem
nop //-- Nop unused bytes
nop //-- Nop unused bytes
nop //-- Nop unused bytes
nop //-- Nop unused bytes
return:
registersymbol(test40131) //-- Register the symbol so you, and CE, can use the symbol outside of the script |
Most of this information can be found on the CE site - particularly 'Auto Assembler Commands'. Also, I recommend searching 'Mirror of: Into the Void: x86 Instruction Set Reference' for a list of opcodes. I learned a lot from both of these sites.
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Csimbi
I post too much
 Reputation: 97
Joined: 14 Jul 2007
Posts: 3327
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| Posted: Fri Apr 24, 2020 4:42 am Post subject: |
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| Seem to be replacing subtraction with addition.
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