Zero 4 Champ series dr1.bin

Extraction and unpacking of game archives and compression, encryption, obfuscation, decoding of unknown files
Argonaut
Posts: 46
Joined: Sat Sep 27, 2014 10:24 pm

Zero 4 Champ series dr1.bin

Post by Argonaut »

As it is with obscure Japanese drifting games that I am interested in comes with them no folders whatsoever within the ISO and large genericly-named bin files.. This dr1.bin is the first and the biggest of the lot, and the header formats- or atleast, the lengthy Hex buildup to them- are the same throughout.

2x 2MB Sample file link (in Zip format):

https://www.dropbox.com/s/d8y3lpf4uo5m8 ... s.rar?dl=0

Now for once, lets hope *somehow* this obscure company decides to use a common compression format.. pah! :lol:
aluigi
Site Admin
Posts: 12984
Joined: Wed Jul 30, 2014 9:32 pm

Re: Zero 4 Champ series dr1.bin

Post by aluigi »

I don't know what obfuscation has been used.
I tried sequential xor and rot from start to end and viceversa but without results containing known data.

This is the testing script I wrote to do these checks in case someone is interested:

Code: Select all

get SIZE asize
#encryption reverse ""
log MEMORY_FILE2 0 SIZE
encryption "" ""

putvarchr MEMORY_FILE SIZE 0
log MEMORY_FILE 0 0
    math X = 0
for i = 0 < SIZE
    get B byte MEMORY_FILE2
    math B2 = B
    math B ^= X
    math X = B2
    put B byte MEMORY_FILE
next i

log "test.dat" 0 SIZE MEMORY_FILE