Unity AssetBundles from "Neural Cloud"

Extraction and unpacking of game archives and compression, encryption, obfuscation, decoding of unknown files
MoonlightArchivist
Posts: 2
Joined: Wed Nov 30, 2022 7:09 pm

Unity AssetBundles from "Neural Cloud"

Post by MoonlightArchivist »

Hi,

I've been trying to get into the AssetBundle files for the Neural Cloud mobile game to extract the game's script. Having machine-searchable story files have been a boon for my lore work on the previous game of the series (Girls' Frontline), but with Neural Cloud it's no longer a matter of just running the .ab through AssetStudio.

I ran the files through a few scripts and dex2jar'd the apk to try and understand what's going on, but I guess I'm just too inexperienced in decryption and don't know what to look for.

Here are sample files: https://drive.google.com/drive/folders/ ... sp=sharing
Any tips would be greatly appreciated.

Cheers!
GeckoLuigi
Posts: 5
Joined: Sat Apr 09, 2022 4:00 am

Re: Unity AssetBundles from "Neural Cloud"

Post by GeckoLuigi »

have you tried asking the guys on unitypy discord server?

They might help you figure it

https://discord.gg/zF3ufkpWeR
MoonlightArchivist
Posts: 2
Joined: Wed Nov 30, 2022 7:09 pm

Re: Unity AssetBundles from "Neural Cloud"

Post by MoonlightArchivist »

GeckoLuigi wrote:have you tried asking the guys on unitypy discord server?

They might help you figure it

https://discord.gg/zF3ufkpWeR
Thanks for the referral, they have good info for this game and I managed to open the assetbundles.

Unfortunately the game's script is nowhere to be found, there's no text assets at all for that matter, and I don't know where else these would be located.

Edit:Turns out these are directly stored in lua files that need to be further decrypted. luadec does the trick nicely once the custom bytes in the file headers are bypassed.