boon's Boon's crackme #1
| Download crackme1.zip, 5 kb (password: crackmes.de) Browse contents of crackme1.zip =-Boon's crackme #1-=
Difficulty: 2 - Needs a little brain (or luck) | RatingVotes: 6 View profile of boon » |
Solutions
Solution by Bswap, published 22. jan, 2009; download (13 kb), password: crackmes.de or browse.
Bswap has rated this crackme as nothing special.
Solution by br0ken, published 22. jan, 2009; download (1329 kb), password: crackmes.de or browse.
br0ken has not rated this crackme yet.
Solution by Sashx41, published 22. jan, 2009; download (6 kb), password: crackmes.de or browse.
Sashx41 has rated this crackme as quite nice.
The submission of solutions is closed.
Discussion and comments
| Sashx41 18. Jan 2009 | Very nice job and a very nice trap, I didn't expect it ;) Solution is comming soon... |
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| Ox87k 19. Jan 2009 | Well, it's just a 1 byte patch crackme! =) |
| boon Author 19. Jan 2009 | Are you sure? Did you actually try it? As sashx41 said ,doing it the obvious way you will discover my trap. |
| br0ken 19. Jan 2009 | Nice. I've seen this kinda protection in some other cmes too. |
| br0ken 19. Jan 2009 | Sent Video Solution:) |
| Ox87k 19. Jan 2009 | Sorry, "just" -> "like"! I wrong to write!!!! |
| Ox87k 20. Jan 2009 | Even if... i made a 1 byte patch and it works fine. Tested on 3 machine and it works good! Is it possibile? ;) |
| boon Author 20. Jan 2009 | Well apparently it is , I guess you did in some unexpected place. *shrugs* |
| Ox87k 22. Jan 2009 | Hum.. Why you guys modify in this way the crackme?! I mean for example br0ken (you because your solution is like mine), why you make something like: 0040109B 90 NOP 0040109C 16 PUSH SS (if you click check button many time it pushes SS everytime in the stack and it isn't that good if you haven't a pop) when you can simply do: 0040109B /EB 00 JMP SHORT fixed.0040109D ?? :) |
| br0ken 22. Jan 2009 | @Ox87k Yes, I should have changed both bytes (0xEB and 0x16) to 0x90. But, by that time I realized this, I had already made the video, and didn't want to make another one. And to my surprise, crackme didn't crash. So, I guess the extra stuff on the stack is no harm. But what you're saying is correct. For a fool-proof way, you must change BOTH bytes to 0x90. @Everyone else, if you go through my solution, remember to change the second byte (i.e 0x16) to 0x90 as well. Thank you. |
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