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Omnitrix, posted Fri Aug 31, 2018 11:29 pm (37995)

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Hello! I want to rip textures and sprites from Sega Heroes mobile game (Android). I tried method with NOX Ninja Ripper, but it didn't work. Then I tried to unpack game data directly, but main files has .sar format with ZSTD header. I tried 7-zip with Zstandart decompression plugin, but unsuccessful. Can someone help me?
I uploaded .apk file if someone need this. https://www.dropbox.com/s/8g9q78oia2uytrq/SEGA Heroes Android v 40.133981 by Sonic and all Characters.apk?dl=0

aluigi, posted Sat Sep 01, 2018 1:24 am (38006)

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The TOC (information about files) is encrypted but you can just dump all the ZSTD compressed files using this script with quickbms and the -e option:

Code:

comtype zstd
findloc OFFSET binary "ZSTD"
do
    goto OFFSET
    get DUMMY long
    findloc NEXT_OFFSET binary "ZSTD" 0 ""
    if NEXT_OFFSET == ""
        get SIZE asize
    else
        math SIZE = NEXT_OFFSET
    endif
    math SIZE -= OFFSET

    goto OFFSET
    idstring "ZSTD"
    get XSIZE long
    math OFFSET   8
    math SIZE   - 8
    clog "" OFFSET SIZE XSIZE

    math OFFSET = NEXT_OFFSET
while NEXT_OFFSET != ""

Remember to use the -e option from command-line or it will not work

Omnitrix, posted Sat Sep 01, 2018 7:12 am (38011)

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Thank you so much!