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efficacy28
Cheater
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Joined: 07 Jun 2010
Posts: 35
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 Posted: Wed Aug 03, 2011 5:58 pm Post subject: [Challenge]Random Cheat Engine Challenge |
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Hi, and welcome to the Random Cheat Engine Challenge! ~Efficacy28
Here, your cheat engine skills will be tested.
Challenge Level 1 - Difficulty:| Easy
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No protection
Your everyday 'cheat engining'
Challenge Level 2 - Difficulty: |||| Medium
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Low protection
This one requires thinking...
Challenge Level 3 - Difficulty: |||||||| Hard
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High protection
For some, this could be easier than level 2.
Challenge Level 4 - Difficulty: |||||||||||||||||||| Impossible
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MAXIMUM protection
Even I couldn't do this... I found it impossible, even though I created it o.O
I did this to show you how games store memory to prevent hacking or make it harder to hack. Rarely do games use the MAXIMUM anti-cheat protection algorithm on level 4.
Good luck~!
UPDATE: Fixed being able to bypass passwords; passwords changed.
- Password is: 5318008 -
Fast Download: http://download1204.mediafire.com/u3y5tlw9r4fg/7bahaw6ogjfy527/RCEC.zip
If that didn't work:
Download: http://www.mediafire.com/?7bahaw6ogjfy527
Virus Scan: http://www.virustotal.com/file-scan/report.html?id=0e45ef2f4e1de331c1948953f2051feaaca13bdbbf06ae328a6a338b1560850f-1316150666
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I like pie so much, that no group could ever sum up to the value of how much of I like pie.
Last edited by efficacy28 on Fri Sep 16, 2011 12:26 am; edited 1 time in total |
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atom0s
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Joined: 25 Jan 2006
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Location: 127.0.0.1
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| Posted: Wed Aug 03, 2011 6:13 pm Post subject: |
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Challenge 1: (Entry: 5318008)
| Code: |
for(; input.nextInt() != 0x512578; System.out.print("Wrong passcode! You can get the passcode here: http://www.forum.cheatengine.org/\nTry again: "));
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Password: 1234098756
Challenge 2: (Entry: 1234098756)
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for(; input.nextInt() != 0x498eda44; System.out.print("Wrong passcode! You can get the passcode by completing Level 1 :)\nTry again: "));
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Password: 311730
Challenge 3: (Entry: 311730)
| Code: |
for(; input.nextInt() != 0x4c1b2; System.out.print("Wrong passcode! You can get the passcode by completing Level 2 :)\nTry again: "));
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Password: 3141337
Challenge 4: (Entry: 3141337)
| Code: |
for(; input.nextInt() != 0x2feed9; System.out.print("Wrong passcode! You can get the passcode by completing Level 3 :)\nTry again: "));
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Password: iBeatThisChallenge
Pro-tip: Java is not secure.
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SwaggaJackin'
Master Cheater
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Joined: 06 Nov 2009
Posts: 304
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| Posted: Wed Aug 03, 2011 6:23 pm Post subject: |
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| LoL. 15 minutes for an "IMPOSSIBLE" challenge. Nice work Wiccan. I didn't bother trying although I saw this, I just don't really trust random APPS and don't have a virtual machine handy at the moment. Maybe the OP will now learn something as well. Interpreted code is butt cheeks to secure.
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efficacy28
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atom0s
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efficacy28
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Geri
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| Posted: Thu Aug 04, 2011 3:08 pm Post subject: |
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I have tried lvl4 only as Wiccaan has posted the passwords anyway.
The address was static, 0093F854.
I didn't bother finding out what is the obfuscation itself. It was easy because it is static. Would have been harder if it is dynamic. I didn't play any java games so I don't know if it is working like this with every java game.
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48.47 KB |
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14284 Time(s) |
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gaming04
Expert Cheater
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Joined: 06 Dec 2010
Posts: 190
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| Posted: Fri Aug 05, 2011 1:16 pm Post subject: |
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| Funny, I gave up after having taken longer than 20 minutes to find the pointer in Easy Mode. Maybe next time, when the challenge is actually a game I enjoy playing. LOL!
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efficacy28
Cheater
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Posts: 35
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| Posted: Fri Sep 16, 2011 12:28 am Post subject: |
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Sorry for grave-digging, but I updated the files by improving security.
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I like pie so much, that no group could ever sum up to the value of how much of I like pie. |
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atom0s
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| Posted: Fri Sep 16, 2011 1:21 am Post subject: |
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| efficacy28 wrote: | | Sorry for grave-digging, but I updated the files by improving security. |
Level 1: (5318008)
| Code: | | intList[num1] = 0x512578; |
Level 2: (543219783)
| Code: | | intList[num1] = 0x2060e047; |
Level 3: (846214579)
| Code: | | intList[num1] = 0x327035b3; |
Level 4: (431546780)
| Code: | | intList[num1] = 0x19b8e19c; |
End number:
| Code: | | intList[num2] = 0x2060cbe7; |
543214567
Here is why I mentioned Java isn't secure for this type of thing, here is level 4 decompiled:
| Code: |
import java.io.PrintStream;
import java.util.Scanner;
public class Level4
{
public Level4()
{
}
public static void main(String args[])
{
Efficacy28 p = new Efficacy28();
Scanner input = new Scanner(System.in);
int num1 = (int)(Math.random() * 9999D);
int num2 = (int)(Math.random() * 9999D);
int intList[] = new int[9999];
for(int i = 0; i < 9999; i++)
intList[i] = (int)(Math.random() * 999999999D);
intList[num1] = 0x19b8e19c;
intList[num2] = 0x2060cbe7;
System.out.print("Random CE Challenge! Level 4: MAXIMUM Protection\nWhat is the passcode?: ");
for(; input.nextInt() != intList[num1]; System.out.print("Wrong passcode! You can get the passcode by completing Level 3 :)\nTry again: "))
{
intList[num1] = (int)(Math.random() * 999999999D);
num1 = (int)(Math.random() * 1000D);
intList[num1] = 0x19b8e19c;
intList[num2] = (int)(Math.random() * 999999999D);
num2 = (int)(Math.random() * 1000D);
intList[num2] = 0x2060cbe7;
}
input.nextLine();
int dec = (int)(Math.random() * 5D) + 1;
int health = 0;
int mult = 0;
System.out.print("*** Passcode correct! Game initiated. ***\nInstructions: Edit your health to be larger than 100, and you win!\n\nHealth: 100\nPress the ENTER key to continue...");
do
{
intList[num2] = (int)(Math.random() * 999999999D);
num2 = (int)(Math.random() * 1000D);
intList[num2] = 0x2060cbe7;
mult = (int)(Math.random() * 1337D) + 1;
health *= mult;
input.nextLine();
dec = ((int)(Math.random() * 5D) + 1) * mult;
health += dec;
if(health < 0 || health >= 101 * mult)
break;
System.out.print((new StringBuilder()).append("\nYou have been shot! Your health decreased by ").append(dec / mult).append(".\nYour health is ").append((100 * mult - health) / mult).append("\nPress the ENTER key to continue...").toString());
dec /= mult;
health /= mult;
} while(true);
if(health > 100 * mult)
System.out.println("\n\nYou were shot and killed! :(");
else
System.out.println((new StringBuilder()).append("\n\nCongratulations! You have won!\nEnter this into the forums to receive glory: ").append(intList[num2]).toString());
input.nextLine();
}
}
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It's not an exact copy of what you actually coded but it is enough to tell what is happening and to get the passwords.
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efficacy28
Cheater
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Joined: 07 Jun 2010
Posts: 35
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| Posted: Fri Sep 16, 2011 6:34 pm Post subject: |
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Is there a free obfuscator somewhere? Or that won't help? What do you suggest?
_________________
I like pie so much, that no group could ever sum up to the value of how much of I like pie. |
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atom0s
Moderator
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Joined: 25 Jan 2006
Posts: 8587
Location: 127.0.0.1
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| Posted: Sat Sep 17, 2011 3:12 am Post subject: |
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| efficacy28 wrote: | | Is there a free obfuscator somewhere? Or that won't help? What do you suggest? |
If it's free it probably wont help much except from beginners that don't know how to unpack / deobfuscate the protection. You're just better off not writing anything crackme/keygenme wise with Java as it is not a secure language in that manner.
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Slugsnack
Grandmaster Cheater Supreme
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Joined: 24 Jan 2007
Posts: 1857
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| Posted: Sat Sep 17, 2011 3:19 am Post subject: |
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| Your protection should not be by obfuscation.
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