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Need help extracting Unity Encrypted Assets (*ab)

Posted: Sat Jun 30, 2018 1:48 pm
by sleepeatrepeat
it's from an android japanese game called Abyss Horizon, can anyone tell me how to extract these files?
it is an Encrypted Unity Assets files in the form of (.ab), any help is appreciated! thanks in advance :)

Battle.ab

Map.ab

Re: Need help extracting Unity Encrypted Assets (*ab)

Posted: Sun Jul 01, 2018 12:32 am
by chrrox
only 0x1000 bytes of each file are encrypted.
the first 0x20 of the encrypted bytes are encrypted with a xor key of 0xA6.
this model
Image
is file AssetBundles/models/boats/130070.ab

the key for each file is not static for the 0xFE0 bytes

Re: Need help extracting Unity Encrypted Assets (*ab)

Posted: Sun Jul 01, 2018 10:23 am
by sleepeatrepeat
chrrox wrote:only 0x1000 bytes of each file are encrypted.
the first 0x20 of the encrypted bytes are encrypted with a xor key of 0xA6.
this model
Image
is file AssetBundles/models/boats/130070.ab

the key for each file is not static for the 0xFE0 bytes

Could you explain how to decrypt them? i'm not familiar with this kind of thing and can't do anything with your explanation (i'm dumb) lol.

thanks in advance

Re: Need help extracting Unity Encrypted Assets (*ab)

Posted: Sun Jul 01, 2018 11:05 am
by chrrox
I can't decrypt that section not sure what the key is.

Re: Need help extracting Unity Encrypted Assets (*ab)

Posted: Sun Jul 01, 2018 11:12 am
by sleepeatrepeat
chrrox wrote:I can't decrypt that section not sure what the key is.

but how did you get that unity3d file?
im using assetstudio to open up 130070.ab file but it doesn't load anything. :?:

Re: Need help extracting Unity Encrypted Assets (*ab)

Posted: Sun Jul 01, 2018 11:13 am
by chrrox
dumped from ram.

Re: Need help extracting Unity Encrypted Assets (*ab)

Posted: Sun Jul 01, 2018 11:15 am
by sleepeatrepeat
chrrox wrote:dumped from ram.
ahh i see, well thanks for the answer i really appreciate it.
cheers man.

Re: Need help extracting Unity Encrypted Assets (*ab)

Posted: Sun Jul 01, 2018 12:22 pm
by onelove1210
chrrox wrote:dumped from ram.
Hi chrrox, could you show me how to dump files from ram on Android device? I want to have a look in some files in this game :D Thank you