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Thread: new tutorial

  1. #1

    Cool new tutorial

    hi all,

    i have written an in depth tutorial for detten's "trythis" crackme, the crackme
    can be found at ptth://biw.rult.at

    the tutorial includes much explanation as well as a serial generator

    you can grab it at
    ptth://home.pages.at/f001/0xf001_trythis_tutorial.txt

    enjoy!

    regards, 0xf001
    Last edited by 0xf001; January 6th, 2005 at 00:00.

  2. #2
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    well in gdb you can use set di i
    or in big form
    set disassembler-flovor intel to get gdb to produce intel output rather than AT&T
    if you wish so
    but if you use intel flavour the dissassembly in registers gets to decimal notation

    ie an address like this [ebp-520] here 520 is deimal not hex
    so if you want to do hexdump $[ebp-520] or ddump $[ebp-520] you have to use
    hexdump $[ebp-0x208] or ddump $[ebp-0x208]

    or you set the input-radix to 10. (notice the dot )
    ie
    gdb trythis
    bp main
    set di i
    set input-radix 10.
    run

    will get you better results as you prefer intel syntax
    have fun and change your tut and wrap it to 800.600
    i still see a horizontal scroll making reading the page an irritation
    nice tut

  3. #3
    thx for the hints blabberer,

    you could send a gdb tutorial

    well i am not so concerned about at&t or radix, as you might think

    in fact i prefer hex notation before decimal one. i wrote as a part of
    an argument in the other thread that i do not like to use objdump for disassembly as it is very limited. this is the main concern.

    with very limited i mean: relying on section headers, and also not doing
    control flow disassembly. by that it is useless to most jobs. of course
    your gcc created executables it can disassemble. but nothing that
    uses the most basic tricks.

    thanks, 0xf001

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