Help - AOB callbacks and crashing.

[aoqia194]

Hello! I recently came across this tool and really want to get it working. I followed the instructions and needed to add AOB callback for FString::ToString, easy enough. Lua script below.

function Register()
    return "E8 ?? ?? ?? ?? EB 69 48 8B D3"
end

function OnMatchFound(MatchAddress)
    return MatchAddress
end

I launch the game to which the console spits out: Was unable to find AOB for 'Unreal Engine Version'. It tells me to override the engine version which I do.
The INI file only has Major and Minor version but no Patch version and the game of choice is on 4.27.2 so if that affects anything please let me know!

Once the engine version is overridden, I spin up the game again only to be met with:

023-10-07 12:20:29] Setting up mods...
[2023-10-07 12:20:29] Cppsdk not present, cpp mods will not be loaded
[2023-10-07 12:20:29] Starting mods (from mods.txt load order)...
[2023-10-07 12:20:29] Starting mods (from enabled.txt, no defined load order)...
[2023-10-07 12:20:29] Console created
[2023-10-07 12:20:29] UE4SS - v2.5.1 Beta #0 - Git SHA #1481302
[2023-10-07 12:20:29] WITH_CASE_PRESERVING_NAME: No

[2023-10-07 12:20:29] No specific game configuration found, using default configuration file
[2023-10-07 12:20:29] Config: ....\Binaries\Win64\UE4SS-settings.ini

[2023-10-07 12:20:29] root directory: ....\Binaries\Win64
[2023-10-07 12:20:29] working directory: ....\Binaries\Win64
[2023-10-07 12:20:29] game executable directory: ....\Binaries\Win64
[2023-10-07 12:20:29] mods directory: ....\Binaries\Win64\Mods
[2023-10-07 12:20:29] log directory: ....\Binaries\Win64
[2023-10-07 12:20:29] object dumper directory: ....\Binaries\Win64


[2023-10-07 12:20:29] Scan attempt 1/60
[2023-10-07 12:20:29] FName::ToString address: 0x7ff766c8524b <- Lua Script
[2023-10-07 12:20:29] StaticConstructObject_Internal address: 0x7ff765535dc0 <- Built-in

It just ends the console and the game crashes.
Now I am pretty sure I have the right AOB pattern, but just to be sure I spent around 6 hours sifting through in IDA just to confirm. Still not 100% sure but it's highly likely that this is the AOB unless I am missing something.

If anyone knows why this is happening or if I just messed up the AOB, any information is good information!!

[aoqia194]

I have solved this AOB, but need to do the rest. For some reason, the function wasn't the correct one and the ACTUAL FName::ToString function I was after in the game's memory contained extremely different instructions and I only found it because of one random call I accidentally stumbled apon.

I used this AOB to get the job done because for some reason smaller AOBs didn't work well.

function Register()
    return "48 89 5C 24 10 55 56 57 48 83 EC 40 8B 01 48 8B DA 8B F8 44 0F B7 C0 C1 EF 10 48 8B F1 80 3D ?? ?? ?? ?? ?? 89 7C 24 78 44 89 44 24 7C 74 09 48 8D 15 ?? ?? ?? ?? EB 16 48 8D 0D ?? ?? ?? ?? E8 ?? ?? ?? ?? 48 8B D0 C6 05 ?? ?? ?? ?? ?? 48 8B 44 24 78 33 ED 48 C1 E8 20 8B CF 8D 3C 00 8B 46 04 48 03 7C CA 10 0F B7 17 C1 EA 06 89 6B 08 85 C0 75 24 39 53 0C 74 08 48 8B CB E8 ?? ?? ?? ?? 48 8B D3 48 8B CF 48 8B 5C 24 68 48 83 C4 40 5F 5E 5D E9 ?? ?? ?? ?? 83 C2 06 39 53 0C 74 08 48 8B CB E8 ?? ?? ?? ?? 48 8B D3 48 8B CF E8 ?? ?? ?? ?? 8B 53 08 8B C5 85 D2 0F 9E C0 8D 7A FF 0F 4E FD 44 8D 40 01 44 03 C2 44 89 43 08 44 3B 43 0C 7E 0C 48 8B CB E8 ?? ?? ?? ?? 44 8B 43 08 8B CF 89 7C 24 60 F7 D1 8B C5 C1 E9 1F 41 3B F8 0F 4C C1 85 C0 75 1B 48 8D 44 24 60 48 89 5C 24 28 48 8D 4C 24 20 48 89 44 24 20 E8 ?? ?? ?? ?? 90 CC 48 8B 03 BA 5F 00 00 00 48 63 CF FF C7 89 7C 24 70 66 89 14 48 8B CF F7 D1 8B C5 C1 E9 1F 3B 7B 08 0F 4C C1 85 C0 75 1B 48 8D 44 24 70 48 89 5C 24 38 48 8D 4C 24 30 48 89 44 24 30 E8 ?? ?? ?? ?? 90 CC 48 8B 03 48 63 CF 66 89 2C 48 48 8B CB 8B 56 04 FF CA 48 8B 5C 24 68 48 83 C4 40 5F 5E 5D E9 ?? ?? ?? ??"
end

function OnMatchFound(MatchAddress)
    return MatchAddress
end