ZenHAX

Free Game Research Forum | Official QuickBMS support | twitter @zenhax | SSL HTTPS://zenhax.com
It is currently Wed Dec 12, 2018 11:48 pm

All times are UTC




Post new topic  Reply to topic  [ 14 posts ] 
Author Message
PostPosted: Mon Nov 19, 2018 4:01 pm 

Joined: Mon Nov 19, 2018 3:42 pm
Posts: 7
// I'm new to this and didn't really know much about decompiling stuff //

Is there any "MCT_" script here? ( found nothing in search ) and how does one knows how to write those script?
( I do found the "MDB1" script for Chaos Rings 2,3 but the older Chaos Rings use the "MCT_" )

// sorry if the question seems strange but as I said I really got no idea about decompiling stuff //


Top
   
PostPosted: Mon Nov 19, 2018 8:58 pm 
Site Admin
User avatar

Joined: Wed Jul 30, 2014 9:32 pm
Posts: 9459
zip one of these files and upload it (here or on mega/mediafire/sendspace).


Top
   
PostPosted: Tue Nov 20, 2018 3:19 am 

Joined: Mon Nov 19, 2018 3:42 pm
Posts: 7
https://mega.nz/#!tpFhTYiI!6KlzCVXFVlRp ... dT4ODn7dis


Top
   
PostPosted: Tue Nov 20, 2018 7:50 am 
Site Admin
User avatar

Joined: Wed Jul 30, 2014 9:32 pm
Posts: 9459
I meant only the "MCT_" files, not the whole 1Gb obb.


Top
   
PostPosted: Tue Nov 20, 2018 11:49 am 

Joined: Mon Nov 19, 2018 3:42 pm
Posts: 7
It's .obb file that is locked in that MCT_ format. Like from this post >>https://zenhax.com/viewtopic.php?f=9&t=698&hilit=Chaos+Rings<<, it's .obb but in that MDB1 format in the post.

( I attached a pic of the files opened in hex workshop. I think that'll explain what I wanted to said better than what I just typed :/ )


Attachments:
SomePic.zip [3.89 MiB]
Downloaded 6 times
Top
   
PostPosted: Tue Nov 20, 2018 7:24 pm 
Site Admin
User avatar

Joined: Wed Jul 30, 2014 9:32 pm
Posts: 9459
Ah ok it's the whole obb that is MCT_, that wasn't clear from the first post.
Just in case someone doesn't want to download the whole file you can use the following quickbms script on the obb and upload the 2 files it generates:
http://aluigi.org/bms/filecutter.bms

Usually these 2 small files are enough to us for analyzing a format.


Top
   
PostPosted: Wed Nov 21, 2018 6:27 am 

Joined: Mon Nov 19, 2018 3:42 pm
Posts: 7
Here's that 2 files


Attachments:
ChaoosRingOmega.zip [3.94 MiB]
Downloaded 6 times
Top
   
PostPosted: Thu Nov 22, 2018 6:14 pm 
Site Admin
User avatar

Joined: Wed Jul 30, 2014 9:32 pm
Posts: 9459
Basically "MCT_" is not the archive but they are all the files inside the archive.
For example the "MCT_" header is available at offset 0, 0x73752, 0xde78f, 0xdf6ec and so on.
It includes the size of the data but the content of such data doesn't have much sense, like if it's compressed but I don't see what may be the algorithm... maybe it's a custom format of compressed images, I don't know.

Anyway with the following script you can at least dump all the data from the obb archive:
Code:
get ARCHIVE_SIZE asize
for OFFSET = 0 != ARCHIVE_SIZE
    idstring "MCT_"
    get ZERO long
    get DUMMY short # 1
    get SIZE long
    math SIZE - 4
    savepos OFFSET
    log "" OFFSET SIZE
    math OFFSET + SIZE
    goto OFFSET
next


Top
   
PostPosted: Sat Nov 24, 2018 3:06 am 

Joined: Mon Nov 19, 2018 3:42 pm
Posts: 7
somehow it seems to fail midway


Attachments:
Untitled2.png [89.84 KiB]
Downloaded 1 time
Top
   
PostPosted: Sat Nov 24, 2018 11:49 am 
Site Admin
User avatar

Joined: Wed Jul 30, 2014 9:32 pm
Posts: 9459
That's good because it means this is the wrong way to handle this data.
You must have another small file that acts as index file, basically it contains all the information of the files stored in the obb archive.
Do you have any small file there that may contain these information?


Top
   
PostPosted: Mon Nov 26, 2018 4:09 am 

Joined: Mon Nov 19, 2018 3:42 pm
Posts: 7
nope. All it has is that 1gb .obb and an APK file.


Top
   
PostPosted: Fri Nov 30, 2018 11:54 am 
Site Admin
User avatar

Joined: Wed Jul 30, 2014 9:32 pm
Posts: 9459
APK is a zip, the index file may be there.


Top
   
PostPosted: Fri Dec 07, 2018 2:28 am 

Joined: Mon Nov 19, 2018 3:42 pm
Posts: 7
here's that apk

https://mega.nz/#!hl8REAaT!fwq_ABnNbYid ... FH1yhvOakI


Top
   
PostPosted: Fri Dec 07, 2018 10:59 pm 
Site Admin
User avatar

Joined: Wed Jul 30, 2014 9:32 pm
Posts: 9459
I don't see references to the MCT_ files.
Maybe someone else has more ideas.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 14 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