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Opera 5.0
Type : Browser Protection : Serial Tech : Patching Crack File : Click here to download crack file ... Crack : Finding a serail number for this baby is now little harder. But it can be cracked with a simple trick. Opera uses serial number . If you enter S/N it will be encrypted and stored in file "OUsr500.dat". So when this program starts up it will check S/N inside this file. If the S/N is correct it will set two flags and the program runs in registered mode. Tracing the program from begining is not a solution to the problem.We will not reach any where if we do so :( Let us take the registration algorithm itself as a path finder to our destination. Enter fake S/N and in SICE BPX HMEMCPY When you pop up into SICE use BPR xxxxxxxx xxxxxxxx on the S/N .This is very improtant as Opera does not use direct flow in validating a S/N.Then trace. One important CALL is shown below : 0x43C83C CALL 0x51C9A9 >> Here our S/N is checked if it is in the form x-xxxxx-xxxxx...... Now our trick : if at startup also the program is using the same algorithm we can easily reach where the flag is set :) So in SICE BPX 0x43C83C Now close Opera and restart it ....Bingo !! We can see at two place it is called and if we trace back we can see the flag set :) 0x41C750 CALL 0x412179 0x41C755 CMP EAX,EDI >> MAKE EAX = 1 TO CRACK THIS 0x41C757 MOV [0x5938D0],EAX >> SAVE FLAG ........................... 0x4D7A5E CALL 0x412179 0x4D7A63 MOV [EDI+0x8B0],EAX >> MAKE EAX = 1 TO CRACK THIS Patch : [PERFECT FIT] 0x41C750 MOV EAX,00000001 | B8 01 00 00 00 - OFFSET = 0x1C750 0x4D7A5E MOV EAX,00000001 | B8 01 00 00 00 - OFFSET = 0xD7A5E