LaFarge's LaFarges crackme #2
| Download lafarge-crackme2.zip, 31 kb (password: crackmes.de) Browse contents of lafarge-crackme2.zip Next one in my crackmes series. Once again, dunno what dificulty it is, u rate it :)
Difficulty: 1 - Very easy, for newbies | Send a message to LaFarge » View profile of LaFarge » |
Solutions
Solution by Lesco, published 20. jul, 2005; download (12 kb), password: crackmes.de or browse.
Lesco has rated this crackme as quite nice.
Solution by Mr ThEkIlLeR, published 11. jan, 2005; download (68 kb), password: crackmes.de or browse.
Mr ThEkIlLeR has not rated this crackme yet.
Solution by _HellDashX_, published 11. jan, 2005; download (64 kb), password: crackmes.de or browse.
_HellDashX_ has not rated this crackme yet.
The submission of solutions is closed.
Discussion and comments
| deibiz_xxl 21. Sep 2005 | I have coded a KeyGen like HellDashX's but his one is better. LOL, good crackme, keep up the good work. I think That reusing the program to make the KeyGen is the best thing you can do to avoid headaches. LOL! |
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| PiCkLeD 03. Jan 2006 | The music in this keygen will drive you friggin nuts! Be warned, gonna write a tut on how to patch the audio :) |
| Reverser 09. Jan 2006 | Cracked by Reverser//ICU :) Good luck LaFarge :) I enjoyed this crackme :) i'm w8ing 4 more =P |
| qHF; 30. Oct 2009 | Patching the music is easy. 00401050 NOP 00401051 NOP 00401052 NOP 00401053 NOP 00401054 NOP 00401055 NOP 00401056 NOP 00401057 NOP 00401058 NOP 00401059 NOP 0040105A NOP 0040105B NOP Not beautiful, but it does the trick. |
| Neonlights 30. Oct 2009 | Music will drive you crazy if you dont crack it in about 38 seconds. But it shouldnt take much longer than that. NEon 3568632395 |
| lordram 29. Nov 2009 | gHF you can also patch the music by changing the 00401603 JNE to JMP ;) |
| h3X- 14. May 2010 | I love the music! Wish more crackmes were of this quality. :) |
| G3rMaN1a 26. Jul 2010 | LOL I finished it in 1 minute by changing 2 Chars with OLLYDBG ^^ |
| Noteworthy 25. Apr 2011 | Cracking done ! MADE US SOMETHING GOOD, OR I SHOOT U :) |
| mausy131 18. Apr 2012 | Very nice CrackMe. I just SelfKeygenned it. It isn't a hard one, but we can learn a lot from it . Nice work -Mausy131 |
| pineapple0x 29. May 2012 | my first crackme, was a nice one... but wery easy lg pineapple... |
| domi338 04. Jun 2012 | Nice crackme domi338@w.cn 314192077 |
| adlers 07. Jun 2012 | Easy to hack, but the keygen creation not so easy... Nice example. |
| kranked 09. Jun 2012 | nice crackme but very easy!! |
| xteraflopx 21. Aug 2012 | <b>Why am I so stupid an not able to do this?</b> |
| mausy131 22. Aug 2012 | Thats not stupid, just need to learn stuff! |
| wired 17. Nov 2012 | Nice Crackme! Greez WireD |
| NukeCrack 05. Jan 2013 | Patched by NukeCrack Time : 3min ;-) |
| ntor 05. Jan 2013 | Keygenned, I'll add my solution. ntor |
| VectorEQ 16. Jan 2013 | loved it, music didnt bother me atall hehe, was the first crackme i did so far :) good stuff. deleted a whole letter N to get around that. still need to learn more to make a keygen sometime :) |
| sraboy 22. Mar 2013 | I can't do keygens yet, but this was simple to patch with OllyDbg by changing the JNZ to JZ at 0x4012BC so any user/serial combo works. I used IDA to find the success message, saw the strcmp about that and noticed the JNZ after that. |
| iSSoGoo 23. Mar 2013 | @sraboy: Hi, I just read you comment. Please re-think about your patch! Will it really work with "any user/serial combo"? For example take this one: iSSoGoo 232974532 Just a hint to let it accept every input: 0x90, 0x90 :D But it will still not accept any input with less than 4 chars, so there has to be patched a bit more ;) Greetings |
| minecrawlerx 23. May 2013 | lawl. this is stupid. My first crackme. And all I do is search for string "nope" and replace first jump I find with NOPs... |
| Draco104 02. Jun 2013 | lol i got bored and made a patch :P |
| JC-SoCal 26. Sep 2013 | I made a video of me reversing the key algorithm and patching it http://www.youtube.com/watch?v=DEDYk8zN53A |
| oXYgen 14. Dec 2013 | Keygen this is very simple if we are a little bit clever :) Solution incoming :D |
| cynic0 24. Apr 2014 | JC-SoCal, thanks for doing that, really helpful! that was my first one, i aimed only on bypass key check, now i've learned how to combine ida with a debugger and that's freaky useful. |
| 5p4d3r 05. Oct 2014 | This was my first keygen. I wrote it in C from OllyDBG output. I found it to be a really fun challenge. It was the first C program I've written in years so it took me way longer than it should've. Thx LaFarge! |
| 5p4d3r 07. Oct 2014 | btw a sophos av reported this crackme as malware ?!?!? |
| 5p4d3r 09. Oct 2014 | @iSSoGoo You can patch it to accept <4 but the serial generation algorithm depends on it. I can't upload a solution but the C code for the keygen I wrote details it clearly. |
| LaFarge Author 02. Feb 2015 | Heh, but the point of the crackme is not to "patch" it. If u payed attention, it says "now go make a keygen". The goal is to understand the algo and to code it for yourself, not to rip it or make selfkeygens. I hope u understand the goals and what u need to do in order to accomplish the goal. Anyway, i wrote this so long time ago, but i think its still good for learning purposes. Crack on |
| Helistar 10. Mar 2015 | Thank you LaFarge, this crackme appears to be popular on the web ;P Very useful, thanks. |
| nthrev 05. Jun 2015 | The challange was amaising its took me 3 h. to understand wxactly the algo , and make the keygen.... you are the best!!!! p.s. if you can make an youtube breakdown for each one of yours challange its will be very helpfull becoas than you can learn and move up , without this its just a test for your skills , nothing to learn from (maximum you get an expiriance) |
| matija90 13. Sep 2015 | Very good encryption and thanks to JC-SoCal for the video. |
| shahril 01. Nov 2015 | very good, this is my first crackme and i done creating a keygen for it :D, took me many hours to analyze it, and music is so good! |
| xTeamStanly 13. Feb, 18:25 | Good crackme, if anyone care about the chiptune I ripped it and you can open it (its 100% opening with VLC, idk about the rest) Link to chiptune: https://www.dropbox.com/s/sc6y4lu9soyu4ah/xmastune%202004.xm |
| Tenderz 09. Mar, 22:28 | First crackme i tried to solve, got me stuck for about 4 hours, but happy to have a working keygen in the end. It surely was fun :) |
| edza 15. Aug, 19:17 | Thanks for making it. Spent a lot of hours (8?) in a leisurely pace. Did it properly rewriting the whole algorithm in C# Self-Keygen here would be the obvious solution with IDA Decompiler copy + paste. Very good for introductory learning. Has a few interesting ideas, but nothing too fancy. https://github.com/Edza/Lafarge2Keygen |
| 707070 29. Aug, 09:18 | im a noob at cracking,just started.DUNNO HOW I SOLVED IT IN 5 MINS(too many tutorials,I guess :> ) |
| h3x1c 01. Sep, 15:36 | Since plenty of others have done a thorough job explaining the keygen algorithm, I decided to do something a bit different and use this CrackMe to demonstrate how to use Cheat Engine to crack and patch apps. For the last bit of the video, I demonstrate how to modify the functionality of the About button to make it successfully register the application when clicked. Hope you enjoy! How to Crack and Patch Applications with Cheat Engine: https://www.youtube.com/watch?v=Emiuht3YSXA |
| edza 16. Oct, 20:30 | I made a short 10 minute YouTube video overview for this crackme. https://www.youtube.com/watch?v=CbQNQEpdMIs It's for the complete beginner who wants to know what to do or is stuck! The quality is not stellar, but the info delivered is solid! :) |
| 1162987472 22. Nov, 16:32 | For a noob(Eg: myself...) Patch it is so easy. But analyze how the key generate from username (not copy+ paste the code to make a key gen) is quite hard... |
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