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[crackme] Opcode0x90's VM crackme

 
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opcode0x90
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PostPosted: Wed Jun 20, 2007 1:25 pm    Post subject: [crackme] Opcode0x90's VM crackme Reply with quote

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. Wink

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. Very Happy

Mirror of crackme can be found on my blog.
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Prowsezy
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PostPosted: Sun Jun 24, 2007 7:26 pm    Post subject: Reply with quote

Shit! *Shoots computer*
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opcode0x90
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PostPosted: Tue Jun 26, 2007 6:18 am    Post subject: Reply with quote

bump
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compactwater
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Joined: 02 Aug 2006
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PostPosted: Tue Jun 26, 2007 6:20 am    Post subject: Reply with quote

Opcode0x90 wrote:
bump

lump Wink

Okay, I'll try.

EDIT:
Plain text?
I stopped it from closing. Laughing
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"



EDIT2:
From what I can tell, you chopped everything up. Crying or Very sad
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Uligor
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PostPosted: Tue Jun 26, 2007 11:22 am    Post subject: Reply with quote

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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