Crack Me Tutorial Using OllyDbg

LaFarge's crackme #2// cracked by NEon Difficulty: 1 - Very easy, for newbies Platform: Windows Language: Assembler Published: 09. Jan, 2005 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= I'm fairly new to this scene so I will try and cover this in detail for someone in a similar situation. I found this to be pretty simple so if your new this Crackme is the one for you. 1) Open "Crackme #2" and get a feel for it notice the two input boxes -=(Optional)=- 2) Type in your "Username" and a random "Reg. code". click "Check it!". You should get an error message "Nope, thats not it! Try again". Close out of the application. 3) Open Ollydbg and load "Crackme#2". 4) Right click in the code area "Search for - All intermodular calls". 5) Click "Destination" to sort by type. 6) Type or look for "user32.GetDlgItemTextA" notice there are two of them (Username, Reg. code), 6) Set a breakpoint (F2) on both, and close the "Found intermodular calls" window. 7) Run the application from Ollydbg (F9). 8) Type in your "Username" and a random "Reg. code". Click "Check it!". 9) The breakpoint will stop on the first "GetDlgItemTextA" which is your "Username", theres nothing you need from this section (but always set a break just in case). 10)Press F9 to continue running the application. 11)It will immediately break again for your "Reg. code". 12)Step through the application (F8), you will only need to do this once you will be brought to "String2", This is your correct "Reg. code" for your "Username", if you notice below it in "String1" your random "Reg. code". Theres no need to go any further. 13)Close out of Ollydbg 14)Reopen "Crackme#2" and input the correct information. -NEon Crack Me link: http://crackmes.de/users/lafarge/lafarges_crackme_2/ OllyDbg link: http://www.ollydbg.de/odbg200j.zip