Cheat Engine Forum Index Cheat Engine
The Official Site of Cheat Engine
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 


void's challenges

 
Post new topic   Reply to topic    Cheat Engine Forum Index -> General programming -> Crackmes
View previous topic :: View next topic  
Author Message
ForumUser
Master Cheater
Reputation: 0

Joined: 06 Feb 2007
Posts: 468
Location: void is ownage

PostPosted: Sun Jul 29, 2007 9:51 pm    Post subject: void's challenges Reply with quote

Crack me: Code obfuscation, speghetti stringed, passsword encrypted

Decrypt me: Find my algorithm, Make a decryptor

Patch me: Make the first messagebox disappear, make the console title "Lol owned", make the second messagebox appear

Smile Have fun. No patching on crackme.

Edit* Haha no one cracked so far. Remember you are playing on my field by my rules Wink


Levels :

Crack me - Semi Intermidiate

Decrypt me - Intermidiate

Patch me - Advance

_________________


I am a male pretending to be female online.
Back to top
View user's profile Send private message
AnonymousX
How do I cheat?
Reputation: 0

Joined: 17 Mar 2007
Posts: 8

PostPosted: Mon Jul 30, 2007 8:48 pm    Post subject: Reply with quote

crackme password: 15

decryptme decrypter attatched. Algorithm was adding 0x12 to each char so decrypter just subtracts 0x12 from each char.

patchme I removed the first messagebox so far, but am not quite sure what you mean by make the second messagebox appear. Is the code for a second messagebox present but just not called? If you don't want to provide hints that's fine, I'll try messing around with it a bit more later.
Back to top
View user's profile Send private message
ForumUser
Master Cheater
Reputation: 0

Joined: 06 Feb 2007
Posts: 468
Location: void is ownage

PostPosted: Mon Jul 30, 2007 10:12 pm    Post subject: Reply with quote

Heres a hint

Code:

push edi
xor edi,edi
mov edi,MessageBoxAddy
push 0
push Text
push Title
push 0x40
call edi


Congrats btw. Lets say you can easily patch it by a nop Wink

_________________


I am a male pretending to be female online.
Back to top
View user's profile Send private message
Cx
Master Cheater
Reputation: 0

Joined: 27 Jul 2007
Posts: 367

PostPosted: Mon Jul 30, 2007 11:22 pm    Post subject: Reply with quote

AnonymousX wrote:
crackme password: 15

decryptme decrypter attatched. Algorithm was adding 0x12 to each char so decrypter just subtracts 0x12 from each char.

patchme I removed the first messagebox so far, but am not quite sure what you mean by make the second messagebox appear. Is the code for a second messagebox present but just not called? If you don't want to provide hints that's fine, I'll try messing around with it a bit more later.


well done. I got that far on the messagebox as well. I thought he used getprocaddress, but apparently not.

_________________

armed with this small butterfly net
i will face the world alone
& never be lonely.
Back to top
View user's profile Send private message
sponge
I'm a spammer
Reputation: 1

Joined: 07 Nov 2006
Posts: 6009

PostPosted: Mon Jul 30, 2007 11:29 pm    Post subject: Reply with quote

ForumUser wrote:
Heres a hint

Code:

push edi
xor edi,edi
mov edi,MessageBoxAddy
push 0
push Text
push Title
push 0x40
call edi


Congrats btw. Lets say you can easily patch it by a nop Wink

there is no sequence like that... if what you're saying is true then push 40 should be hardcoded in. but there is no sequence of push 40 and call edi in the entire codesecition.

_________________
Back to top
View user's profile Send private message
Cx
Master Cheater
Reputation: 0

Joined: 27 Jul 2007
Posts: 367

PostPosted: Mon Jul 30, 2007 11:30 pm    Post subject: Reply with quote

VOID THAT WAS THE MESSAGEBOX THAT HE REMOVED.
_________________

armed with this small butterfly net
i will face the world alone
& never be lonely.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Cheat Engine Forum Index -> General programming -> Crackmes All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group

CE Wiki   IRC (#CEF)   Twitter
Third party websites