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Thread: Exclusive known as xor crypto, how to read the uncrypted string

  1. #1

    Exclusive known as xor crypto, how to read the uncrypted string

    Well the the dynamic dll has some of its strings protected by exclusive or crypting known as xor. I would like to read out those strings but i dont know how, searched googles and several froums i found out that people are using ida pro plugin x 86 emu but that plugin crashes after some steps into and wont read out the strings.

    Im using ida pro 5.2 also having olly dbg.

    Anyone who has a clue what i could do or know some special plugins please answer THX!

  2. #2
    I use UltraEdit and Calc usually until I've broken the code and then whip up in a decryptor in Visual Studio when I've got enough info. For how long it takes I normally don't bother with plugins.

  3. #3
    can u specifie what is calc?

  4. #4
    Sure, Start->Run->Calc

  5. #5
    Watch out for that xor crypto ... rumor has it the NSA might be able to break it, but I doubt it...

  6. #6

    XorTool

    Well the the dynamic dll has some of its strings protected by exclusive or crypting known as xor. I would like to read out those strings but i dont know how
    If it's simple XOR, ADD, SUB and ROR/L (1 byte password) and you know some know string from DLL you can use
    http://progress-tools.110mb.com/xortool.html for searching or decoding whole file for preview what is inside.
    I promise that I have read the FAQ and tried to use the Search to answer my question.

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