Greedy_Fly Posted November 17, 2013 Share Posted November 17, 2013 Hi All...Test It!!! Rules:- Valid Serial + tutorial- No bruteforce allowed! CrackMe1.1.zip Good Luck!!!---------------------------------------------------------Greedy Fly Link to comment

ChOoKi Posted November 18, 2013 Share Posted November 18, 2013 Serial : 181804461EDC771ED0FD0673 Is it the same one posted here? http://www.crackmes.de/users/greedy_fly/crackme_v1.1/ Link to comment

sama Posted November 22, 2013 Share Posted November 22, 2013 0x8166F372 == 2171007858 dec 0x16F0599C == 384850332 dec equations to solve to get a point of start :2171007858 - 3x == y4y - 3x == 384850332 where y == value of the middel 8 digits x == Value of first 8 digitswe transform the equations so that variables are on the one side and on the other the valueso our equation become - 3 * x - y == - 2171007858 (dont forget the sign) !- 3 * x + 4 * y == 384850332By dividing the first Equation by -3 , we eliminate the factor before x : x + 1/3 * y == 723669286 - 3 * x + 4 * y == 384850332With the first Equation, which is in all other equation of the summand eliminated by x.For the second Equation, we add 3 times the 1 Equation :x + 1/3 * y == 7236692865 * y == 2555858190Dividing the second Equation by 5, the factor in front of y is eliminated :x + 1/3 * y == 723669286y == 511171638With the second Equation is eliminated in all other equation of the summand with y .To finish the first Equation we subtract y/3 from first equation so that the result is: x == 553278740 => 0x20FA5D14 y == 511171638 => 0x1E77DC36 ------------------------------------------------------------------------- So, the rest of the crackme should be simple, in fact what remains is simple math I dont want to spoil out the full solution, while with those infos should everyone be able to calculate the final key And no bruteforcing is needed sorry for my poor english i use a translator. 1 Link to comment

ChOoKi Posted November 28, 2013 Share Posted November 28, 2013 (edited) Today's weather forecast : Cloudy, possible showers and a 5% chance for Greedy_Fly to reply. Edited November 28, 2013 by ChOoKi 3 1 Link to comment

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