home *** CD-ROM | disk | FTP | other *** search
- How to crack R!SC Crakpad by ACiD BuRN
-
-
-
- hi everybody !!!
- today , i will make a tut on a crackme , it is a modified version
- of notepad (M$).
-
- Protection: - Time Limit
- - NaG ScReeN
- - Packed
-
-
- i will just explain you how to crack the protection , not how to
- unpack it.this will be very easy , lets Go !!!!
- so , move your windows clock to the future !! in 2002 for exemple
- and run crakpad !!!
- A messagebox say you : This version has expired ...
- So , set a breakpoint on getlocaltime like this: BPX GetLocalTime
- run the prog and he we break in softice !!!!
- Cool !! , press F12 to go back to the call and we see:
-
-
- 40623D 66813FCF07 CMP WORD PTR [EDI],07CF <= 7CF(h) = 1999(d) it compare with the year 1999
- 406242 7F3C JG 406280 <= if it geater than 1999 goto bad boy :(
- 406244 7C07 JL 40624D <== if less goto good boy :)
- ...... .......... .......................
-
-
- heheh , so how to crack this ?
- Very easy , it compares with the year 1999 , and jump to error message if the year is greater
- that 1999.We can nop it , but it not needed coz , he test if is less than this year with the
- command : JL 40624D , it jump to the program if the year is good , so we will make it jump for
- ever !!
- so JL 40624D become jump 40624D
-
-
- to try this in memory , without patching the file coz it is packed , type:
- a 40624D and press enter
- then type : jump 40624D and press enter. Press escape and now F5 to let him runing !
- Cool , we have now a nag sreen , but we don't see the error message , for expirer verion ..
- you did it !!
- Now , we need to kick this nag , but it is very easy !!!!
- type : BPX MessageBoxA
- you have to patch the memory again , for the time limit.
- run the prog , and he will break on the messageboxa API !!
- heheh , i am sure it will be finish in 30 secondes now !!
- F12 to get out the call and we see :
- 40625B FF1530744000 Call [USER32!MessageBoxA] <== this is the call for the messagebox !
- ..... ............ .........................
-
- So , if we want to kill the nag , we just have to nop the call !!
-
- replace : FF1530744000
- 909090909090
-
- so to try the crack completely , put a bpx on getlocaltime , do the modification like we
- do first and atfer type : a 40625B nop enter
- then type nop , 5 times again and escape after this
- type bd * for disable all breakpoint and press F5 , you will go in Crakpad without a time limit
- message or NAG !!!!!
- Another One cracked !!
- now , you have to unpack it to patch it after , coz process patcher are not allowed
- and we have just patched the memory !!
- but it is not my job to say how to do that !! :)
-
-
- i hope you have understand this tut and you learn something with !!
- If you have any question mail me to : acid2600@hotmail.com
- Thx to read this Tut !!
- cya ...
-
-
- Greetings to (not specific order!):
-
- CyberBlade , ^inferno^ , MiZ , Borna janes , DnNuke , TexSkyman , Virus , theCorpse , BuLLeT,
- Volatility , Eternal Bliss, appbusta ... so All ReFleXZ TeAM , All ECL TeAM , ALL CRACKER WORLD
- TeaM and ALL CROSSOVER TEAM too !!
-
-
- if i forget someone , sorry !! to loto of dude to put here !!
- i am lazzy !!
-
- ACiD BuRN [RFZ/ECL/CW/CO]
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-