downloadbrowseLFalch's LFalch's 1st crackme

Download LFalch_s_1st_Crackme.zip, 4 kb (password: crackmes.de)
Browse contents of LFalch_s_1st_Crackme.zip

This is the first crackme I've made
It's not that hard to complete but it can be fun to do

Goal:
Make a keygen
Rules:
Don't alter any of the classes in the jar
Feel free to decompile the jar
Bonus Info:
The jar is obfuscated
The serial only consists of letters and numbers

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Java

Published: 12. Apr, 2013
Downloads: 432

Rating

Waiting for at least 3 votes
(we have only 2).

Rate this crackme:

Send a message to LFalch »

View profile of LFalch »

Solutions

Solution by warsaw, published 18. jun, 2013; download (3 kb), password: crackmes.de or browse.

warsaw has rated this crackme as quite nice.

Submit your solution »

Discussion and comments

LFalch
Author
14. Apr 2013		Yay it's been approved
salacryl
15. Apr 2013		Nice Work. Yes easy, but not so obvious. A lot of fun and gimme something so learn. I didn't know what an obfuscator is.
Thanks :)
LFalch
Author
21. Apr 2013		Glad you liked it!
CrackerNoob^2
11. Nov 2013		I couldn't use ollydbg, what do you use?
Articstorm
28. Mar 2014		@crackernoob^2

you can use Jar2Exe and then use ollydbg or you use jd-gui and look there at the structure. i found the routine, but i have no idea how to make a keygen.
LFalch
Author
28. Mar 2014		The goal is create a keygen. For that you'll need to use jd-gui or some other decompiler to see how it checks the codes.
iStefano
10. Jan, 15:43		Nice crackme! I solved it with keygen and with patch

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.