indomit's indoKGM1
| Download indoKGM1.zip, 24 kb (password: crackmes.de) Browse contents of indoKGM1.zip Hello All!
Difficulty: 1 - Very easy, for newbies | Send a message to indomit » View profile of indomit » |
Solutions
Solution by Kostya, published 06. jul, 2006; download (3 kb), password: crackmes.de or browse.
Kostya has rated this crackme as nothing special.
Discussion and comments
| BugHunter 25. Apr 2006 | Hm, what is that VERY goodboy msg? Is it encrypted? |
|---|---|
| indomit Author 25. Apr 2006 | No, It's not encrypted. Open exe in Hex-Editor and look at addresses 7900h-79A0h ;) Just goodboy msg - at 7D40-7DA0 :) But I think the VERY goodboy msg isn't reachable... But if u can to prove it... ;o) |
| Lesco 25. Apr 2006 | Is it intended, that the entered serial is a factor in the calculation of the right serial for the normal goodboy message? |
| indomit Author 25. Apr 2006 | 2Lesco: Yes, it's my little idea. ;) |
| indomit Author 27. Apr 2006 | It's booring? :/ |
| treebug 30. Apr 2006 | I enjoyed it. This was my first crackme. I see how it gets values for and uses the [name], [serial], [serial+name]. Then compares [name]+[name/serial] to the original serial. And I see where the final decision is made. But I haven't written a keygen for this yet. |
| indomit Author 10. May 2006 | Anyone can create keygen? =) Need some hints? =) |
| Kostya 28. Jun 2006 | 2indomit: I did it.. :0) |
| indomit Author 09. Jul 2006 | 2Kostya, nice work, but in ur solution u wrote: >>If we repeat it ("last part gen time") 4 times we will get our correct second part of serial. Why exactly 4 times? %) I do not understand :) |
| Kostya 23. Jul 2006 | No need to deep inside the code algo, I made this without it. ;) << Yeah, no needs to try harder if it works..>> Am I right?! And also it has no crypt algos [we can load it in PEiD and start "Krypto ANALyzer" plugin to see all known crypto signatures]. I entered serial first , then tryed to do it second. (simple math induction method) And then i realized that if we made the same actions 4 time we will have the results. So if we make > 4 or 4 times keygenning we will have this results. E.g: if we enter serial 1234567890123456 and generate real serial (for my name) first time we will have FC33DFB9XXXXXXXX, after checking it, this serial we will be wrong because after keygening there is block of code which generates second part (starting @ 004087C5, ends @ 00408819), it is based on the serial we have entered. So in conclusion I want to say that it simply depends on the Name and the serial we have entered before. But after keygening n times it will have key like FC33DFB95B588047 that after keygening by this block of code it will gen second part: 5B588047, SO we will have righ serial "FC33DFB9"+"5B588047". :) and the serial FC33DFB95B588047 will be correct! :) Hm...And what about keygen it doesn't work?! :) Something wrong!? Do u need source of my keygen!? (written in MASM32) |
You may leave your comment, thoughts and discuss this crackme with other reversers here.
Acting childish will not be tolerated.
HTML and such will be left as-is, so don't try.