| View previous topic :: View next topic | 
	
	
		| Author | Message | 
	
		| Noz3001 I'm a spammer
 
  Reputation: 26 
 Joined: 29 May 2006
 Posts: 6220
 Location: /dev/null
 
 | 
			
				|  Posted: Thu Jan 01, 2009 9:43 am    Post subject: Easy |   |  
				| 
 |  
				| Post password and username. 
 Not for people who like a challenge!
 |  | 
	
		| Back to top |  | 
	
		|  | 
	
		| arigity Advanced Cheater
 
  Reputation: 0 
 Joined: 03 Jul 2008
 Posts: 65
 Location: middle of nowhere.
 
 | 
			
				|  Posted: Thu Jan 01, 2009 10:42 am    Post subject: |   |  
				| 
 |  
				| user: arigity pass: fun`ns~
 _________________
 
 |  | 
	
		| Back to top |  | 
	
		|  | 
	
		| tombana Master Cheater
 
 ![]() Reputation: 2 
 Joined: 14 Jun 2007
 Posts: 456
 Location: The Netherlands
 
 | 
			
				|  Posted: Fri Jan 02, 2009 3:27 am    Post subject: |   |  
				| 
 |  
				| I got it because just before the loggedin/wrongpass message I saw a string in the stack-window which turned out to be the correct pass. I don't get the encryption/decryption however. The program keeps encrypting/decrypting the functions, why? |  | 
	
		| Back to top |  | 
	
		|  | 
	
		| Noz3001 I'm a spammer
 
  Reputation: 26 
 Joined: 29 May 2006
 Posts: 6220
 Location: /dev/null
 
 | 
			
				|  Posted: Fri Jan 02, 2009 5:33 am    Post subject: |   |  
				| 
 |  
				|  	  | tombana wrote: |  	  | I got it because just before the loggedin/wrongpass message I saw a string in the stack-window which turned out to be the correct pass. I don't get the encryption/decryption however. The program keeps encrypting/decrypting the functions, why? | 
 
 
 Just something I threw in.
 |  | 
	
		| Back to top |  | 
	
		|  | 
	
		| DoomsDay Grandmaster Cheater
 
  Reputation: 0 
 Joined: 06 Jan 2007
 Posts: 768
 Location: %HomePath%
 
 | 
			
				|  Posted: Fri Jan 02, 2009 6:06 am    Post subject: |   |  
				| 
 |  
				| Anti debug. The algorithm itself is quite simple:
 004013B0 -> strlen(name)
 004013C5 -> password <- name ^ len
 |  | 
	
		| Back to top |  | 
	
		|  | 
	
		| Noz3001 I'm a spammer
 
  Reputation: 26 
 Joined: 29 May 2006
 Posts: 6220
 Location: /dev/null
 
 | 
			
				|  Posted: Fri Jan 02, 2009 6:18 am    Post subject: |   |  
				| 
 |  
				| Ya, didn't spend a lot of time on that part ^_^. Took a while to make storage for the strings. The crackme part kinda ruined it because i had to compare them. 
 Well, at least it's suitable for someone who's just started learning ( I hope ).
 |  | 
	
		| Back to top |  | 
	
		|  | 
	
		| S3NSA :3
 
  Reputation: 1 
 Joined: 06 Dec 2006
 Posts: 1908
 Location: England.
 
 |  | 
	
		| Back to top |  | 
	
		|  | 
	
		|  |