Difficulty : 4 (Maybe 5)
Language : NET 2.0
Platform : Windows  x32/x64
OS Version : Windows 7,8,10 (All windows with .NET Framework 2)
Packer / Protector : Crypto obfuscator (only strings, names and all types to non-printable) > ConfuserFx (Anti ildasm, anti tamper, anti dump, anti debug)

Description:

Greetings to the Tuts4You community. I wrote a CrackMe in C #. I used two protection programs on it. I made it more difficult because the previous one was easy. In this case, the password can be retrieved and not encrypted.

Get the long license key and post. Write a simple tutorial how you did it. But you can not modify the program to display the MessageBox of success.

Eddy420 (I'm sorry for English, I'm Czech)

Screenshot:

Dowload

CrackMe[!Eddy420].zip

Real dif = 1
Key:
 

Spoiler

AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F62AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FfaAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F32AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F2AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fc5AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F8AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F79AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F62AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F93AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fd1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F59AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F89AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FfdAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F62AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F3fAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F38AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F14AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Ff5AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F41AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F4aAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F35AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F14AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FdcAS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F7AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F95AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fe4AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-FeAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Ff1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F82AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F19AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F42AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FbaAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fc2AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fc9AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Ff6AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F44AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fb9AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F9aAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Ff7AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F31AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F41AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FcbAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fc7AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F2AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fa1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F6dAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F9bAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Ff7AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F81AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fc8AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F9dAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fa2AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F3eAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F35AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fd5AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F21AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F3AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fa1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F19AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F4AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F14AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F9d

 

Encryption is so poor. It's unmodified ConfuserEx right? 

Quote

AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F62AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FfaAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F32AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F2AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fc5AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F8AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F79AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F62AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F93AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fd1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F59AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F89AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FfdAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F62AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F3fAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F38AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F14AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Ff5AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F41AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F4aAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F35AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F14AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FdcAS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F7AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F95AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fe4AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-FeAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Ff1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F82AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F19AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F42AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FbaAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fc2AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fc9AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Ff6AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F44AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fb9AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F9aAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Ff7AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F31AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F41AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FcbAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fc7AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F2AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fa1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F6dAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F9bAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Ff7AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F81AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fc8AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F9dAS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fa2AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F3eAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F35AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fd5AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F21AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F3AS-5EFX-12AS-5-FAS-5EFX-12AS-5-Fa1AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F19AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F4AS-5EFX-12AS-5-FAS-5EFX-12AS-5-FAS-5EFX-12AS-5-F14AS-5EFX-12AS-5-FAS-5EFX-12AS-5-F9d

Serial number checking procedure

Quote

// Ui.Form1
// Token: 0x0600000D RID: 13 RVA: 0x00002B1C File Offset: 0x00002B1C
private void button1_Click(object sender, EventArgs e)
{
    long num = (long)((ulong)(Form1.num1 - Form1.num2 - Form1.num3 - Form1.num4 - Form1.num5 - Form1.num6 - Form1.num7));
    if (!(this.textBox1.Text == string.Empty))
    {
        for (;;)
        {
            switch (2)
            {
            case 0:
                continue;
            }
            break;
        }
        if (!true)
        {
            RuntimeMethodHandle runtimeMethodHandle = methodof(Form1.button1_Click(object, EventArgs)).MethodHandle;
        }
        if (num < (long)\u0003.\u0001(36))
        {
            for (;;)
            {
                switch (3)
                {
                case 0:
                    continue;
                }
                break;
            }
        }
        else
        {
            this.computedPwd();
            if (Form1.LIC == this.textBox1.Text)
            {
                for (;;)
                {
                    switch (6)
                    {
                    case 0:
                        continue;
                    }
                    break;
                }
                MessageBox.Show(\u0002.\u0001(230), \u0002.\u0001(446), (MessageBoxButtons)\u0003.\u0001(48), (MessageBoxIcon)\u0003.\u0001(52));
                return;
            }
            Form1.cntTry += \u0003.\u0001(56);
            if (Form1.cntTry == \u0003.\u0001(60))
            {
                for (;;)
                {
                    switch (2)
                    {
                    case 0:
                        continue;
                    }
                    break;
                }
                this.textBox1.Enabled = (\u0003.\u0001(64) != 0);
                MessageBox.Show(\u0002.\u0001(489), \u0002.\u0001(534), (MessageBoxButtons)\u0003.\u0001(68), (MessageBoxIcon)\u0003.\u0001(72));
                return;
            }
            MessageBox.Show(\u0002.\u0001(567) + Form1.cntTry + \u0002.\u0001(592), \u0002.\u0001(639), (MessageBoxButtons)\u0003.\u0001(76), (MessageBoxIcon)\u0003.\u0001(80));
            return;
        }
    }
    MessageBox.Show(\u0002.\u0001(144), \u0002.\u0001(195), (MessageBoxButtons)\u0003.\u0001(40), (MessageBoxIcon)\u0003.\u0001(44));
}
 

 

2 hours ago, GautamGreat said:

Encryption is so poor. It's unmodified ConfuserEx right? 

Serial number checking procedure

 

Good work on my crackMe, you know! How did you get this il code? Did you use a specific program? Write procedure step by step. Thank you  

I'm tried debug on dnspy .

Just use ConfuserEx Anti Tamper remover & de4dot