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Thread: Olly Problem

  1. #1
    Winds of Change
    Join Date
    Feb 2004
    Location
    Reality, unlike some people
    Posts
    43

    Question Olly Problem

    Tool - Olly 1.09d
    OS - WinME (I have all the Band-Aid's from WindowsUpdate)
    Target - Yeah Right, like I am going to post it
    Protection: Aspr (Problem Occurs with 1.2x - 1.3x RC4)

    Ok while attempting an unpack I get a Memory Access Violation
    Code:
    011F33D8	3100			XOR DWORD PTR DS:[EAX],EAX
    
    EAX = 00000000
    DWORD PTR DS:[EAX] = ????????
    Ok, thats where I land, I know I can use ALT + F9 or pass it to the prog, but does nothing when I do, EIP doesn't change. I can hold down ALT + F9 and it will switch to "Running" and the back to "Paused" without prossesing any further instructions.

    If I set up under Debugging Options to ignore Memory Access Violations and automatically pass them to the prog, it runs the prog normally.

    Why is it Olly can automatically send to prog and it works, but I can't?
    I even tried Assembling it to:

    Code:
    011F33D8	33C0			XOR EAX,EAX
    
    EAX = 00000000
    And the prog crashes.

    What am I missing?
    Regards,
    %UNDEFINED%

    "Without change one cannot evolve."

  2. #2
    at a quess i'd say it's trying to trip a fault so the exception handler takes over
    so you could try seeing whats at fs:0 and working from that to set a bpx on its seh

  3. #3
    mmk
    Guest
    Quote Originally Posted by %UNDEFINED%
    Ok, thats where I land, I know I can use ALT + F9 or pass it to the prog,

    ...

    What am I missing?
    Should be shift+F7/F8/F9.
    Last edited by mmk; March 7th, 2004 at 14:21.
    I promise that I have read the FAQ and tried to use the Search to answer my question.

  4. #4
    Winds of Change
    Join Date
    Feb 2004
    Location
    Reality, unlike some people
    Posts
    43
    Yeah thats what I meant...sorry I am at work,
    I have to limit my time online.
    I was typing fast without thinking I guess
    Regards,
    %UNDEFINED%

    "Without change one cannot evolve."

  5. #5
    Winds of Change
    Join Date
    Feb 2004
    Location
    Reality, unlike some people
    Posts
    43
    I guess the point of my question would be why can't I send Violations to prog?
    Regards,
    %UNDEFINED%

    "Without change one cannot evolve."

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