downloadbrowsemucki's crackme#4a

Download crackme4a.zip, 17 kb (password: crackmes.de)
Browse contents of crackme4a.zip

In my opinion the 4th crackme was the best one of my crackmes yet, but it was written in java which was the reason why not many of you tried it. That's why I decided to write it again in MASM, but of course it has other protections now. It's a Server-Crackme again, so you can also write a client bruter to get the valid serial.

- get the serial
- and submit a tutorial

hints:
- serial is short, only lowercase characters
- to enter serial use a telnetclient at standard-port 23 (command: "telnet localhost")

Tested on WinXP emb SP1 but should also work on other Windows os.

Regards,

mucki

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 15. Jan, 2007
Downloads: 1873

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by dreak, published 21. jan, 2007; download (79 kb), password: crackmes.de or browse.

dreak has rated this crackme as quite nice.

Solution by profdracula, published 21. jan, 2007; download (9 kb), password: crackmes.de or browse.

profdracula has rated this crackme as nothing special.

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Discussion and comments

mucki
Author
16. Jan 2007
i guess there will be more than one valid serial, but one is sufficient.
profdracula
16. Jan 2007
hi mucki, solved and uploaded solution. If you think one serial is enough, then check out the keygen :)
mucki
Author
16. Jan 2007
hey, you are very fast! hope you liked it. you wrote a keygen? that's more than i had expected.
hardcoder
16. Jan 2007
Great as always, nice to see you come up with new ideas every time, one thing that remained same was your trap flag trick :-)

regards
mucki
Author
21. Jan 2007
hi nice solutions. i know it's a bit too easy but i had some trouble while programming it so i wanted to get rid of it - that the reason for the weak serial protection. the 0x17 i used to encrypt the strings is the crc8 value of the file (anti patching protection).
profdracula
21. Jan 2007
Well I enjoyed this. Waiting for your next crackme :)
dreak
21. Jan 2007
Thanks! I thought this one was great, even if my solution seems to be a bit... wrong in comparison to profdraculas'
mucki
Author
23. Jan 2007
wow, 1404 downloads in such a short time! do you have problems with your counter?
zairon
Moderator
23. Jan 2007
mucki, I don't think. That's interesting indeed. Maybe you used a downloader bot just to increase the counter :p
We'll check! :)
mucki
Author
23. Jan 2007
i would never do that :)

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