Decrypting sw

[software]

Hello everyone possible to assist in the dismantling of Software and analysis

Software download from here

https://www.sendspace.com/file/fdxch8

[aluigi]

Well, let's try something like the following which is very easy and "blind", basically it's a script for QuickBMS that searches the empty spaces between the blocks of data and automatically decompresses the zlib and lzma blocks:

Code: Select all

quickbmsver "0.7.5" # http://quickbms.aluigi.org
for
    savepos OFFSET
    findloc NEXT_OFF binary "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff" 0 "" -1
    if NEXT_OFF == ""
        get NEXT_OFF asize
    endif
    xmath SIZE "NEXT_OFF - OFFSET"

    string NAME p "%08x." OFFSET

    get DUMMY threebyte
    if DUMMY == 0x00005d    # lzma
        comtype lzma_dynamic
        clog NAME OFFSET SIZE SIZE
    elif DUMMY == 0x464544" # DEFD"
        math OFFSET + 0x20
        math SIZE   - 0x20
        comtype zlib_noerror
        clog NAME OFFSET SIZE SIZE
    else
        log NAME OFFSET SIZE
    endif
    goto NEXT_OFF
    do
        get TMP byte
    while TMP == 0xff
    goto -1 0 SEEK_CUR
next

Is this 1506A_STG4_sat-illimite 300F_V8.07.06_20160706-2.bin the firmware of some Satellite tuner? Just curious.

*edit* moved topic in the correct section

[software]

yes Software Receiver Beginning decompress each block 5d000080 the zlib and lzma

DECIMAL HEX DESCRIPTION
---------------------------------------------------------------------------------
----------------------
154624 0x25C00 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 407696 bytes
376832 0x5C000 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 1273060 bytes
872448 0xD5000 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 8043848 bytes
3694592 0x386000 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 80896 bytes
3731456 0x38F000 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 67584 bytes
3756032 0x395000 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 762880 bytes
4030464 0x3D8000 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 992256 bytes
4341760 0x424000 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 262144 bytes
4440064 0x43C000 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 52224 bytes
4460544 0x441000 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 15790080 bytes
7057408 0x6BB000 LZMA compressed data (sig 3), properties: 0x5D, d
ictionary size: 8388608 bytes, uncompressed size: 264192 bytes

crc FDCE3FB7
crc table 8D97687D

Problem in re-compress each block does not infer the real size