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How to Optimize AOBScan?

 
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MustangNil
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PostPosted: Tue May 07, 2024 8:12 am    Post subject: How to Optimize AOBScan? Reply with quote
Hello everyone, I'm facing a small issue. The game I'm modifying frequently changes its dynamic address. So, I've created this script to ensure that every time the dynamic address disappears, the AOB ReScan runs normally. The problem is, every time I perform an AOB, the game freezes for a bit, indicating that it's not very optimized. Is there any way to 'save' the dynamic address without losing it after the first AOB? Repeating AOBs doesn't seem very feasible. And of course, pointers aren't an option for me either.

Code:

{$lua}


[ENABLE]

ResultadoAobInvenLeon = AOBScan("C1 ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? 48 43 00 00 C8 42 ?? ?? ?? ?? ?? ?? 02")

if ResultadoAobInvenLeon == nil then
    FalhaScanInvenLeon = 1
else
    if readInteger("bio4+BF8") == 3 then
        EnderecoParaInvenLeon = ResultadoAobInvenLeon[0]
        EnderecoParaInvenLeon = tonumber(EnderecoParaInvenLeon, 16)
        ValorInvenLeon = EnderecoParaInvenLeon - 0x1E
        FalhaScanInvenLeon = 0
        print("Sucesso!")
        --print(string.format("%X", EnderecoParaInvenLeon - 0x1E))
    end
end

function InvenLeon()
    if FalhaScanInvenLeon ~= 1 then
        writeInteger(ValorInvenLeon, 218)
    end
end


function InvenLeonScan()
    if readInteger("bio4+BF8") ~= 3 and readInteger("bio4+BF8") ~= 262 then
        FalhaScanInvenLeon = 1
        print("BBLABLALBA")
    end

    if FalhaScanInvenLeon == 1 and readInteger("bio4+BF8") == 3 then
        ResultadoAobInvenLeon = AOBScan("C1 ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? 48 43 00 00 C8 42 ?? ?? ?? ?? ?? ?? 02")
        EnderecoParaInvenLeon = ResultadoAobInvenLeon[0]
        EnderecoParaInvenLeon = tonumber(EnderecoParaInvenLeon, 16)
        ValorInvenLeon = EnderecoParaInvenLeon - 0x1E
        FalhaScanInvenLeon = 0
        print("Sucesso [ReScan]")
    end
end



if ResultadoAobInvenLeon ~= nil then
    if InvenLeonT then InvenLeonT.destroy(); InvenLeonT=nil end
    InvenLeonT = createTimer()
    InvenLeonT.interval = 100
    InvenLeonT.ontimer = InvenLeon
end



if InvenLeonScanT then InvenLeonScanT.destroy(); InvenLeonScanT=nil end
InvenLeonScanT = createTimer()
InvenLeonScanT.interval = 1000
InvenLeonScanT.ontimer = InvenLeonScan




[DISABLE]
if FalhaScanInvenLeon == 0 then
    writeInteger(ValorInvenLeon, 0)
end

if InvenLeonT then InvenLeonT.destroy(); InvenLeonT=nil end
if InvenLeonScanT then InvenLeonScanT.destroy(); InvenLeonScanT=nil end

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Game Hacking Dojo
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PostPosted: Tue May 07, 2024 8:28 am    Post subject: Reply with quote
There's no instruction in assembly that is above 15 bytes. Your AOB should at least get the first byte of each line (except if the line is one byte long, then ignore it)

Secondly, you should use module AOB scan which will make your scan 10x faster.

Code:
{$asm}aobscanmodule(aob_example, bio4.exe, C3 C3 C3 C3 C3 C3 C3)


celua.txt
Quote:
AOBScanModuleUnique(modulename, aobstring, OPTIONAL protectionflags, OPTIONAL alignmenttype, OPTIONAL alignmentparam)- Integer : scans for the aobstring in the designated module


The return of AOBScanModuleUnique is the address of the found AOB. So, once you find your AOB the first time check if your variable holding the AOB is 0.

Example in lua:
Code:
AOBScanModuleUnique(process, "48xxxxxxxxxx48xxxxxx48xxxx48xxxx8BxxFFxxxx84xx74xx48xxxxxx48xxxxxx44xxxxxxxx41xxxx41xxxxxx77xx48xxxx8Bxx48xxxx48xxxxxxxxFFxxxxxxxxxx8DxxxxF7xxxxxxxxxx75xx83xxxx74xx40xxxxEBxx40xxxx48xxxxxxxxxxxxE8xxxxxxxx41xxxxxxxxxx40xxxxxxxx44xxxx8Bxx48xxxxE8xxxxxxxx48xxxxxxxx48xxxxxxxx48xxxxxxxxxx")
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MustangNil
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Posts: 12
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PostPosted: Tue May 07, 2024 9:37 am    Post subject: Reply with quote
Stopped crashing as a magicic, thank you very much!
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