ZenHAX

Free Game Research Forum | Official QuickBMS support | twitter @zenhax | SSL HTTPS://zenhax.com
It is currently Sun Nov 19, 2017 2:44 am

All times are UTC




Post new topic  Reply to topic  [ 4 posts ] 
Author Message
 Post subject: FSB inside strange file.
PostPosted: Wed Oct 25, 2017 11:23 pm 

Joined: Mon Oct 09, 2017 5:50 pm
Posts: 5
Example:
Attachment:
25e9a41f.zip [247.7 KiB]
Downloaded 7 times


There's this strange file that I see the FSB5 header inside. But not sure how to extract it, or what this file is?


Top
   
PostPosted: Thu Oct 26, 2017 10:52 am 
Site Admin
User avatar

Joined: Wed Jul 30, 2014 9:32 pm
Posts: 7110
What you see there is just a sequence of "FSB5" chars, it can be just a false positive moreover because there are no filenames visible there.
I don't know what type of compression is applied to that unity3d file.


Top
   
PostPosted: Thu Oct 26, 2017 5:19 pm 

Joined: Mon Oct 09, 2017 5:50 pm
Posts: 5
aluigi wrote:
What you see there is just a sequence of "FSB5" chars, it can be just a false positive moreover because there are no filenames visible there.
I don't know what type of compression is applied to that unity3d file.

These unity3d files come from a bigger file. https://download-cdn-ac-pocketcamp.akam ... 9ac8d.zdat

The game splits them up and saves them locally. That zdat has more unity3ds with more FSB5 headers.


Top
   
PostPosted: Mon Oct 30, 2017 12:38 pm 

Joined: Mon Oct 09, 2017 5:50 pm
Posts: 5
I found out if you XOR the first character with 'G', then xor the next character with that result, and then xor the next character with that result, etc.. you will obtain the original 'UnityFS' header. There is a certain point you need to stop because it looks like the body of the file is not xored and you begin encrypting the body instead.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 4 posts ] 

All times are UTC


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Powered by phpBB® Forum Software © phpBB Limited