hackholmes's KeygenMe #3
| Download KeygenMe_#3.zip, 150 kb (password: crackmes.de) Browse contents of KeygenMe_#3.zip Solution Levels:
Difficulty: 3 - Getting harder | RatingWaiting for at least 3 votes View profile of hackholmes » |
Solutions
Solution by acruel, published 23. sep, 2015; download (2 kb), password: crackmes.de or browse.
acruel has not rated this crackme yet.
Discussion and comments
| segra 17. Sep 2015 | Took me way longer than expected, but it was my first keygen :) |
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| segra 17. Sep 2015 | in saying that, it was a fun challenge, Thanks |
| tetman 17. Sep 2015 | Got the general serial code and made a activation code gen program. I tried to make a serial gen, but seems my equation is not working although randomly generated code seems correct. ((double)(func(tmp, 0) - 351689844.0) / 209.0)*749.0 + 354911237.0 |
| segra 17. Sep 2015 | There is 2 halves to the serial (7 chars each), both start from the same random value. both values are multiplied, and added to. the values are both divided by 26, 7 times, and remainder of each operation is put into the serial. the final position of the serial, is the sum of every odd position across the entire serial |
| tetman 17. Sep 2015 | Yes, based on the comment the above equation give the last half number which is 26mal number. I don't know where I'm stuck. |
| segra 17. Sep 2015 | i've posted the code as a solution, but until its reviewed, if you want to cheat :) https://github.com/segrax/KeygenMe3 |
| tamaroth Moderator 25. Sep 2015 | tetman: not sure if I remember correctly, but find out about conversion between base-10/base-16 and base-26, this should give you a helping hand. |
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