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Thread: How do I patch?

  1. #1
    illenda
    Guest

    How do I patch?

    First off, I just started with this like ~2 days ago, caught my interest but I've got no clue what I'm doing ;p

    I'm supposed to patch 0x49DBA0 with "mov al, 1; retn" [0xB0, 0x01, 0xC3].
    i've tryed adding "mov al, 1; retn" to 0049DBA0 in IDA, not getting anywhere from there, though =/

    wondering if anyone would be up to explaining this since i'm a complete retard when it comes to reverse engineering =/
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  2. #2
    Welcome aboard

    Imho, one of the most important things is to chose the right tools for your work. IDA is used to analyze a target, not to modify it. For patching you want to consider a good hex editor which can deal with assembly. Check out "Hiew", it's a little oldschool (no graphical UI) but it's one of the best for doing simple patching tasks.

  3. #3
    As for targets I trust to be loaded into a debugger I prefer OllyDbg.

  4. #4
    http://www.intel.com/products/processor/manuals/

  5. #5
    illenda
    Guest
    thanks for the help guys, couldn't get it to work though.
    need to do some reading, got no clue what i'm doing here so cannot figure it out ^^
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  6. #6
    Stop cracking and spend a LOT of time with the tools first.... (most have a tutorial somewhere... nowadays, you even have VIDEO tutorials)

    Shovels are not meant for sweeping and brooms are not meant for digging....

    Have Phun
    Blame Microsoft, get l337 !!

  7. #7
    PAtching with a debugger will just modify the loaded image, use olly dump to dump the modified image and reconstruct the data structures such as import table etc..
    Last edited by ronnie291983; January 27th, 2010 at 05:54. Reason: adding info

  8. #8
    ZophtX
    Guest
    I suggest you looking up Lena151 tut for newbies.
    she tell and and show you how to reverse engineer from the ground up.
    very nice tutorial. very nice
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  9. #9

    But...

    Quote Originally Posted by ZophtX View Post
    I suggest you looking up Lena151 tut for newbies.
    she tell and and show you how to reverse engineer from the ground up.
    very nice tutorial. very nice
    And in a completely useless, non contributing addition to this thread, I would like to inform you that unfortunately, there are no pics of Lena in a bikini, sweating it off in a humid room, cracking and preparing video tuts... *sigh*

    Have Phun
    Blame Microsoft, get l337 !!

  10. #10

    useless too, don't bother.

    Too bad...still you have LLXX' ones, innit?
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  11. #11
    reknihT esreveR SiGiNT's Avatar
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    Quote Originally Posted by Aimless View Post
    And in a completely useless, non contributing addition to this thread, I would like to inform you that unfortunately, there are no pics of Lena in a bikini, sweating it off in a humid room, cracking and preparing video tuts... *sigh*

    Have Phun
    There was one a couple of years ago on the ARTeam site, (I understand it WAS NOT disappointing!), but she took it down before I was able to see it - maybe via the Alexis WayBack machine???

    SiGiNT
    Unemployed old fart Geek - Self Employed Annoyance
    Team: Noobisco Crackers
    If someone can't do it for you, you'll never learn!

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