[CrackMe] .NET Klinzter v1.4

[Klinzter]

This is a crackme using vb.net

the modified app should accept any key and say registered.

if you crack it mention what tools you used!

CrackMe.rar

[kao]

 

 

Perhaps you could spend some time reading this forum and learning basics before making your next attempt? This is not even a 5-minute challenge.

 

3 bytes changed. Used tools: ILSpy and HIEW (but any good .NET decompiler and hex editor will do). Most people would use de4dot, Reflector and Reflexil - but that would modify the entire executable.

crackme-patched.zip

[Klinzter]

kao, thats exactly what I was looking for.. I way to crack it without modifying the entire exe file..

now my question to you since the file is obfuscated how did you manage to find the location to patch..

[kao]

Obfuscation is just a minor slowdown if you know what you're looking for.

 

Start with your crackme without obfuscation. Learn to find the important comparison and patch it using Reflexil - there are plenty of tutorials about that.

Then learn to make the same patch using hex editor - there are tutorials about that as well.

And after that - try to do the same with your obfuscated crackme. You'll see that it's just slightly harder because function names and strings are gone..

[atom0s]

Here's mine patched. Tools used:

 - de4dot (Removal of SmartAssembly)

 - Greywolf (IL editor to remove various IL from the button click method to force always registered.)

 

Original function was:

private void method_0(object sender, EventArgs e)

{

    try

    {

        if (Operators.CompareString(this.vmethod_4().Text, "6594682899080", false) == 0)

        {

            this.vmethod_2().Text = "Registered!";

        }

        else

        {

            this.vmethod_2().Text = "Not Registered!";

        }

    }

    catch (Exception expr_3D)

    {

        ProjectData.SetProjectError(expr_3D);

        Exception ex = expr_3D;

        Debug.Print("cmdStart_Click: " + ex.Message);

        ProjectData.ClearProjectError();

    }

}

Cracked.7z

[Accede]

my try tools used:

reflector + reflexil plugin

@atom0s thx for the tip with Greywolf

Cracked2.7z

[Hadits follower]

Cracked

file offset = 0x3080

patch = 17

[kao]

@Death: your patch will work incorrectly, if correct serial will be entered.

 

EDIT: Nevermind, I'm wrong. Nice patch!

Edited March 22, 2013 by kao