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Beginners CrackMe

 
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Noz3001
I'm a spammer
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PostPosted: Sat Oct 11, 2008 4:27 am    Post subject: Beginners CrackMe Reply with quote

Post the password, if you can. Laughing
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DoomsDay
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Posts: 768
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PostPosted: Sat Oct 11, 2008 6:31 am    Post subject: Reply with quote

No SunBeam Allowed!
Lol!

EDIT: got it Smile
0FA57B3
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Noz3001
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PostPosted: Sat Oct 11, 2008 7:49 am    Post subject: Reply with quote

DoomsDay wrote:
No SunBeam Allowed!
Lol!

EDIT: got it Smile
0FA57B3


Razz. Gonna post the password?
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DoomsDay
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PostPosted: Sat Oct 11, 2008 8:16 am    Post subject: Reply with quote

It will take me a while to reverse it (if at all), but I think I got the encryption right:
Code:
while (offset < length)
 eax  <- eax << 4 + byte ptr [str+offset]
 eax  <- eax ^ ((eax & F0000000) >> 18)
 inc offset
endw
eax <- eax & 0FFFFFFF


EDIT: I'm gonna start having fun with it, I found the weak-spot Very Happy
As for a working password - 963150000003:
Code:
;ASSUMED NUMERIC PASSWORD - MINIMUM
;RESULT   < PRE-XOR  < PRE-ADDITION | VALUE
;00FA57B3 < 80FA5733 < 80FA57B3     | 33
;080FA570 < 480FA530 < 480FA500     | 30
;0480FA50 < 6480FA30 < 6480FA00     | 30
;06480FA0 < 96480F30 < 96480F00     | 30
;096480F0 < C9648030 < C9648000     | 30
;0C964800 < 3C964830 < 3C964800     | 30
;03C96480 < 03C96480 < 03C96450     | 30
;003C9645 < 003C9645 < 003C9610     | 35
;0003C961 < 0003C961 < 0003C930     | 31
;00003C93 < 00003C93 < 00003C60     | 33
;000003C6 < 000003C6 < 00000390     | 36
;00000039 < 00000039 < 00000000     | 39
;------------------------------------------
;963150000003
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h4cks 4 FuN
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PostPosted: Mon Oct 13, 2008 4:30 pm    Post subject: Reply with quote

how'd u do that?
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Noz3001
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PostPosted: Tue Oct 14, 2008 1:27 am    Post subject: Reply with quote

DoomsDay wrote:
It will take me a while to reverse it (if at all), but I think I got the encryption right:
Code:
while (offset < length)
 eax  <- eax << 4 + byte ptr [str+offset]
 eax  <- eax ^ ((eax & F0000000) >> 18)
 inc offset
endw
eax <- eax & 0FFFFFFF


EDIT: I'm gonna start having fun with it, I found the weak-spot Very Happy
As for a working password - 963150000003:
Code:
;ASSUMED NUMERIC PASSWORD - MINIMUM
;RESULT   < PRE-XOR  < PRE-ADDITION | VALUE
;00FA57B3 < 80FA5733 < 80FA57B3     | 33
;080FA570 < 480FA530 < 480FA500     | 30
;0480FA50 < 6480FA30 < 6480FA00     | 30
;06480FA0 < 96480F30 < 96480F00     | 30
;096480F0 < C9648030 < C9648000     | 30
;0C964800 < 3C964830 < 3C964800     | 30
;03C96480 < 03C96480 < 03C96450     | 30
;003C9645 < 003C9645 < 003C9610     | 35
;0003C961 < 0003C961 < 0003C930     | 31
;00003C93 < 00003C93 < 00003C60     | 33
;000003C6 < 000003C6 < 00000390     | 36
;00000039 < 00000039 < 00000000     | 39
;------------------------------------------
;963150000003


Oh dear, that isn't supposed to happen XD
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DoomsDay
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PostPosted: Tue Oct 14, 2008 7:17 pm    Post subject: Reply with quote

As you can see, the xor you used made my method possible Smile
I wonder what the original password was though...(I only know that it was one word, and possibly ended with an s, c, 3 or # [by looking at an ascii table] Razz)
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SunBeam
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PostPosted: Thu Oct 16, 2008 5:03 pm    Post subject: Reply with quote

Props to DoomsDay Wink I stand aside this time, hat's off Wink
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Noz3001
I'm a spammer
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Joined: 29 May 2006
Posts: 6223
Location: /dev/null

PostPosted: Tue Nov 11, 2008 8:40 am    Post subject: Reply with quote

DoomsDay wrote:
As you can see, the xor you used made my method possible Smile
I wonder what the original password was though...(I only know that it was one word, and possibly ended with an s, c, 3 or # [by looking at an ascii table] Razz)


FYI, The last letter IS 's'. First is 'N'.
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DoomsDay
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PostPosted: Wed Nov 12, 2008 4:32 am    Post subject: Reply with quote

noz3001 wrote:
DoomsDay wrote:
As you can see, the xor you used made my method possible Smile
I wonder what the original password was though...(I only know that it was one word, and possibly ended with an s, c, 3 or # [by looking at an ascii table] Razz)


FYI, The last letter IS 's'. First is 'N'.
TheCakeIsALiejmsXPs Laughing
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Noz3001
I'm a spammer
Reputation: 26

Joined: 29 May 2006
Posts: 6223
Location: /dev/null

PostPosted: Wed Nov 12, 2008 5:34 am    Post subject: Reply with quote

DoomsDay wrote:
noz3001 wrote:
DoomsDay wrote:
As you can see, the xor you used made my method possible Smile
I wonder what the original password was though...(I only know that it was one word, and possibly ended with an s, c, 3 or # [by looking at an ascii table] Razz)


FYI, The last letter IS 's'. First is 'N'.
TheCakeIsALiejmsXPs Laughing



HAHAHAHA!!! Damn it, that isnt actually the password I meant to be used but whatever.
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nwongfeiying
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Joined: 25 Jun 2007
Posts: 695

PostPosted: Wed Nov 12, 2008 6:58 pm    Post subject: Reply with quote

You guys are crazy. How did you reverse engineer that? It's got me stumped.

I think I like memory editing better...
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blackmorpheus
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Joined: 05 Apr 2008
Posts: 159

PostPosted: Sat Nov 15, 2008 1:06 pm    Post subject: Reply with quote

You might wanna google Lena151's tutorials on tuts4you...
You will get very far with that.
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