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Thread: IDA 7.2 + hexrays-x64 leak

  1. #1
    Administrator Shelwien's Avatar
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    IDA 7.2 + hexrays-x64 leak

    People finally cracked the password for Jan-2019 leak of IDA72 "crackme" installer,
    by reproducing the password generation script from known passwords (turned out to be a rand-based perl script).

    https://devco.re/blog/2019/06/21/ope...nusual-way-en/
    https://www.reddit.com/r/ReverseEngi...nstaller_prng/

    password is 7JpT48a7Y2fv

    this is the script:
    Code:
    #!/usr/bin/env perl
    #
    @_e = split //,"abcdefghijkmpqrstuvwxyzABCDEFGHJKLMPQRSTUVWXYZ23456789";
     
    $i=948301080;
     
    srand($i);
     
    rand 54; # собственно пропускаем 1 вызов rand...
     
    $pw="";
    for($i=0;$i<12;++$i)
    {
        $key = rand 54;
        $pw = $pw . $_e[$key];
    }
    print "$pw\n";

  2. Thanks:

    xinix (24th June 2019)

  3. #2
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    Hi Shelwien, Do you use such tool to optimize your code like some do ?

  4. #3
    Administrator Shelwien's Avatar
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    Yes, I mainly use it as a debugger for my code though (it has an integrated debugger).

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