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opcode0x90
Cheater
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Joined: 05 Aug 2006
Posts: 27
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 Posted: Wed Jun 20, 2007 1:25 pm Post subject: [crackme] Opcode0x90's VM crackme |
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My second crackme. It is a VM crackme, means the whole is written and interpreted by a VM engine. I didnt add any anti-debug trick except a nice anti-PEiD trick in it. 
Again, patching is allowed. Tick ZF is not accepted as a solution, as the effect is not permanent. Learn how to patch dude. If you patch the crackme, submit the patched version here.
If possible, do take some time write up a tutorial on how you cracked it so others can learn from it. 
Mirror of crackme can be found on my blog.
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Prowsezy
Grandmaster Cheater
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Joined: 04 Dec 2006
Posts: 755
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| Posted: Sun Jun 24, 2007 7:26 pm Post subject: |
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Shit! *Shoots computer*
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opcode0x90
Cheater
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Joined: 05 Aug 2006
Posts: 27
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| Posted: Tue Jun 26, 2007 6:18 am Post subject: |
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compactwater
I post too much
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Joined: 02 Aug 2006
Posts: 3923
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| Posted: Tue Jun 26, 2007 6:20 am Post subject: |
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lump
Okay, I'll try.
EDIT:
Plain text?
I stopped it from closing. 
Still no pizza. =(
Not declaring my win, merely showing:
| Code: | 0040130A . 43 6F 6E 67 72 61 74 75 6C 61 ASCII "Congratula"
00401314 74 DB 74 ; CHAR 't'
00401315 69 DB 69 ; CHAR 'i'
00401316 6F DB 6F ; CHAR 'o'
00401317 6E DB 6E ; CHAR 'n'
00401318 . 2C DB 2C ; CHAR ','
00401319 . 20 79 6F 75 20 73 75 63 63 65 73 73 66 75 6C 6C ASCII " you successfull"
00401329 . 79 20 73 6F 6C 76 65 64 20 74 68 69 73 20 63 72 ASCII "y solved this cr"
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EDIT2:
From what I can tell, you chopped everything up. 
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Uligor
Grandmaster Cheater
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Joined: 21 Jan 2006
Posts: 956
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| Posted: Tue Jun 26, 2007 11:22 am Post subject: |
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If you want it done easily, change 0040149A to AE (13 FF = je, AE FF = jne)
This way will work with nearly all passes, except with the real pass and collisions (your algorithm sux opcode >=( add 1337C0DE, DEADBEEF pl0x)
Or you can see the file I attached, which will work for every pass.
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