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slippppppppp
Grandmaster Cheater
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Joined: 08 Aug 2006
Posts: 929
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 Posted: Mon Sep 03, 2007 9:09 pm Post subject: My first C++ crackme |
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You wont believe how incredibly easy this is. its a 1/10 challenge.
Rules, no patching, just find the password. TY 
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Zand
Master Cheater
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Joined: 21 Jul 2006
Posts: 424
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| Posted: Mon Sep 03, 2007 11:19 pm Post subject: |
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Symbol
I'm a spammer
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Joined: 18 Apr 2007
Posts: 5094
Location: Israel.
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| Posted: Tue Sep 04, 2007 6:54 am Post subject: |
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nice
good idea for putting the password after the "Congrats" and then if its not the password jump the incorrect password  it took me a while to understand that becuase 1 O_O lol 1..? i could have cracked it without olly :O if it was like 11 i wouldnt think about that lol 
C++ crackme's are hard
...well, they are hard for me 
1333 post, soon 1337  
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haha01haha01
Grandmaster Cheater Supreme
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Joined: 15 Jun 2007
Posts: 1233
Location: http://www.SaviourFagFails.com/
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| Posted: Tue Sep 04, 2007 9:27 am Post subject: |
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pass = 1
ur crackme has a jump table and the win\wrong msg is decided here:
| Code: | 00401143 . 833D D0014300>CMP DWORD PTR DS:[4301D0],1
0040114A . 75 05 JNZ SHORT Crackme.00401151
0040114C . E8 BEFEFFFF CALL Crackme.0040100F
00401151 > 33C0 XOR EAX,EAX
00401153 . 833D D0014300>CMP DWORD PTR DS:[4301D0],1
0040115A . 0F94C0 SETE AL
0040115D . 85C0 TEST EAX,EAX
0040115F . 75 05 JNZ SHORT Crackme.00401166
00401161 . E8 BDFEFFFF CALL Crackme.00401023 |
the two calls call the jump to win\wrong msg.
there is 1 "decoy" win msg. heres ur jump table:
| Code: | 00401005 $ /E9 C6010000 JMP Crackme.004011D0
0040100A $ |E9 71020000 JMP Crackme.00401280
0040100F $ |E9 FC020000 JMP Crackme.00401310 ; good
00401014 . |E9 17020000 JMP Crackme.00401230
00401019 . |E9 F2020000 JMP Crackme.00401310 ; good
0040101E $ |E9 4D000000 JMP Crackme.00401070
00401023 $ |E9 A8030000 JMP Crackme.004013D0 ; bad
00401028 . |E9 A3020000 JMP Crackme.004012D0 |
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