[crackme] # New Crackme .NET #

[RDGMax]

Hi Everyone..

 

Here a new crackme + Simple coded in .net 

 

 

 

 

Goal: Get the correct serial for your username 

 

Download: http://www.sendspace.com/file/ku1aq3

 

Rar Pass: crackme

 

That is all 

 

 

 

Greets

Edited August 6, 2013 by RDGMax

[XenocodeRCE]

 

Xenocode

6C756A2F697151776E477058393452736A67467248673D3D

 

 

Was quit easy, and it's called a "keygenme", but correct me if I'm wrong

 

n.b; are you the real Tejon owner ?

Edited August 6, 2013 by Xenocode

[RDGMax]

Was quit easy, and it's called a "keygenme", but correct me if I'm wrong

 

n.b; are you the real Tejon owner ?

 

Excellent..Tomorrow..level 2 OK

 

Correct if you get the serial is a semi keygen me.. if you patch it's a.. crackme

Edited August 6, 2013 by RDGMax

[atom0s]

Name: atom0s

Serial: 34473469305034716F35343D

[RDGMax]

Ready for Level 2?

[RDGMax]

RDG Simple Crackme Level 2

 

 

Download: http://www.sendspace.com/file/fbntb7

 

Rar Pass: crackme

[atom0s]

Keygen + src for Level 1:

 

 

/**

 * atom0s!keygen.exe (c) 2013 [atom0s@live.com]

 * 

 * Keygen for RDGMax CrackMe found here:

 * http://forum.tuts4you.com/topic/32850-new-crackme-net/

 */

 

namespace atom0s_keygen

{

    using System;

    using System.IO;

    using System.Security.Cryptography;

    using System.Text;

    using System.Windows.Forms;

 

    public partial class frmMain : Form

    {

 

        /// <summary>

        /// Default Constructor

        /// </summary>

        public frmMain()

        {

            InitializeComponent();

        }

 

        /// <summary>

        /// Text input change event handler.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void txtUsername_TextChanged(object sender, EventArgs e)

        {

            if (this.txtUsername.Text.Length < 6)

            {

                this.txtSerial.Text = "Invalid Username Length! (6+ chars needed!)";

                return;

            }

 

            var serial = this.StringToHex(this.EncryptString(this.txtUsername.Text));

            this.txtSerial.Text = string.IsNullOrEmpty(serial) ? "Invalid username input; cannot create serial!" : serial;

        }

 

        /// <summary>

        /// Converts the input string to a hex string.

        /// </summary>

        /// <param name="strInput"></param>

        /// <returns></returns>

        private string StringToHex(string strInput)

        {

            var str = string.Empty;

            for (var x = 1; x <= strInput.Length; x += 1)

            {

                var exp = String.Format("{0:X}", (int)strInput[x - 1]);

                if (exp.Length == 1) exp = "0" + exp;

                str += exp;

            }

            return str;

        }

 

        /// <summary>

        /// Encrypts the input string with DES encryption.

        /// </summary>

        /// <param name="strInput"></param>

        /// <returns></returns>

        private string EncryptString(string strInput)

        {

            if (string.IsNullOrEmpty(strInput))

                return string.Empty;

 

            var key = new byte[] { 0xD4, 0xED, 0x34, 0x93, 0x1C, 0x48, 0xAC, 0x08 };

            var vec = new byte[] { 0x12, 0x44, 0x16, 0xEE, 0x88, 0x15, 0xDD, 0x41 };

            

            var desProvider = new DESCryptoServiceProvider();

            var stream = new MemoryStream();

            var str = string.Empty;

 

            try

            {

                // Convert the input to bytes..

                var data = Encoding.UTF8.GetBytes(strInput);

 

                // Encrypt the data with DES..

                var encStream = new CryptoStream(stream, desProvider.CreateEncryptor(key, vec), CryptoStreamMode.Write);

                encStream.Write(data, 0, data.Length);

                encStream.Flush();

                encStream.Close();

 

                // Encode the return in base64 format..

                str = Convert.ToBase64String(stream.ToArray());

            }

            catch

            {

            }

            finally

            {

                stream.Close();

            }

 

            return str;

        }

    }

}

atom0s!keygen.zip

[RDGMax]

 

Keygen + src for Level 1:

 

/**

 * atom0s!keygen.exe (c) 2013 [atom0s@live.com]

 * 

 * Keygen for RDGMax CrackMe found here:

 * http://forum.tuts4you.com/topic/32850-new-crackme-net/

 */

 

namespace atom0s_keygen

{

    using System;

    using System.IO;

    using System.Security.Cryptography;

    using System.Text;

    using System.Windows.Forms;

 

    public partial class frmMain : Form

    {

 

        /// <summary>

        /// Default Constructor

        /// </summary>

        public frmMain()

        {

            InitializeComponent();

        }

 

        /// <summary>

        /// Text input change event handler.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void txtUsername_TextChanged(object sender, EventArgs e)

        {

            if (this.txtUsername.Text.Length < 6)

            {

                this.txtSerial.Text = "Invalid Username Length! (6+ chars needed!)";

                return;

            }

 

            var serial = this.StringToHex(this.EncryptString(this.txtUsername.Text));

            this.txtSerial.Text = string.IsNullOrEmpty(serial) ? "Invalid username input; cannot create serial!" : serial;

        }

 

        /// <summary>

        /// Converts the input string to a hex string.

        /// </summary>

        /// <param name="strInput"></param>

        /// <returns></returns>

        private string StringToHex(string strInput)

        {

            var str = string.Empty;

            for (var x = 1; x <= strInput.Length; x += 1)

            {

                var exp = String.Format("{0:X}", (int)strInput[x - 1]);

                if (exp.Length == 1) exp = "0" + exp;

                str += exp;

            }

            return str;

        }

 

        /// <summary>

        /// Encrypts the input string with DES encryption.

        /// </summary>

        /// <param name="strInput"></param>

        /// <returns></returns>

        private string EncryptString(string strInput)

        {

            if (string.IsNullOrEmpty(strInput))

                return string.Empty;

 

            var key = new byte[] { 0xD4, 0xED, 0x34, 0x93, 0x1C, 0x48, 0xAC, 0x08 };

            var vec = new byte[] { 0x12, 0x44, 0x16, 0xEE, 0x88, 0x15, 0xDD, 0x41 };

            

            var desProvider = new DESCryptoServiceProvider();

            var stream = new MemoryStream();

            var str = string.Empty;

 

            try

            {

                // Convert the input to bytes..

                var data = Encoding.UTF8.GetBytes(strInput);

 

                // Encrypt the data with DES..

                var encStream = new CryptoStream(stream, desProvider.CreateEncryptor(key, vec), CryptoStreamMode.Write);

                encStream.Write(data, 0, data.Length);

                encStream.Flush();

                encStream.Close();

 

                // Encode the return in base64 format..

                str = Convert.ToBase64String(stream.ToArray());

            }

            catch

            {

            }

            finally

            {

                stream.Close();

            }

 

            return str;

        }

    }

}

 

 

 

Excellent bro.. Solve this level (Level 2) for get the Level 3..

You Are a Machine

[atom0s]

 

Excellent bro.. Solve this level (Level 2) for get the Level 3..

You Are a Machine

 

 

Level 2:

 

Name: atom0s

Serial: 506C3262614972635645513D

[RDGMax]

Level 2:

 

Name: atom0s

Serial: 506C3262614972635645513D

 

The level 3. Will not use the same encryption method. because you only have to know the key

[atom0s]

Yeah level 2 the key only changed; same code as my previous keygen, just change the key to:

            var key = new byte[] { 0x18, 0x45, 0x53, 0x76, 0x57, 0xB7, 0x92, 0x6A };

[Teddy Rogers]

The [crackme] tag has been added to your topic title.

Please remember to follow and adhere to the topic title format - thankyou!

[This is an automated reply]

[master131]

Level 2:

 

Name: master131

Serial: 776D4A552F4B3343432B7467506A7479794A79474A673D3D

 

Note to RDGMax, your anti-debug method using NtQueryInformationProcess with the ProcessDebugObjectHandle and ProcessDebugPort flags isn't 64-bit/AnyCPU compatible because you've declared the P/Invoke signature incorrectly.

 

I didn't hardcode the byte array key to show that I actually did the reversing myself.

using System;

using System.IO;

using System.Security.Cryptography;

using System.Text;

using System.Windows.Forms;
namespace RDG_CrackMe_Level_2

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }
        private byte[] GetKeyFromString(string value)

        {

            var bytes = new byte[8];

            var key = new byte[8];

            var encoding = new ASCIIEncoding();

            int charIndex = 0;

            encoding.GetBytes(value, charIndex, value.Length, bytes, charIndex);
            byte[] buffer2 = new SHA1CryptoServiceProvider().ComputeHash(bytes);

            charIndex = 0;

            do

            {

                key[charIndex] = buffer2[charIndex];

                charIndex++;

            } while (charIndex <= 7);
            return key;

        }
        public string Generate(string name)

        {

            return Sth(Se(name));

        }
        public string Sth(string StrToHex)

        {

            string str2 = string.Empty;

            for (int i = 1; i <= StrToHex.Length; i++)

            {

                string expression = ((int) StrToHex[i - 1]).ToString("X");

                if (expression.Length == 1) expression = "0" + expression;

                str2 += expression;

            }

            return str2;

        }
        public string Se(string strSource)

        {

            string str = string.Empty;

            var objDES = new DESCryptoServiceProvider();

            var Vector = new byte[] { 0x12, 0x44, 0x16, 0xEE, 0x88, 0x15, 0xDD, 0x41 };

            byte[] TheKey = GetKeyFromString("6889948"); // (0x18, 0x45, 0x53, 0x76, 0x57, 0xB7, 0x92, 0x6A)

            

            try

            {

                byte[] bytes = Encoding.UTF8.GetBytes(strSource);
                using (var stream = new MemoryStream())

                using (var stream2 = new CryptoStream(stream, objDES.CreateEncryptor(TheKey, Vector), CryptoStreamMode.Write))

                {

                    stream2.Write(bytes, 0, bytes.Length);

                    stream2.FlushFinalBlock();

                    str = Convert.ToBase64String(stream.ToArray());

                }

            }

            catch

            {

            }
            return str;

        }
        private void generateButton_Click(object sender, EventArgs e)

        {

            if (nameTextBox.Text.Length >= 6)

                serialTextBox.Text = Generate(nameTextBox.Text);

        }

    }

}

Edited August 7, 2013 by master131

[RDGMax]

Hi Again

 

Level 3 / 10

 

Include a Simple Dll

 

 

Beware atom0s is near

 

Download: http://www.sendspace.com/file/ic2emt

 

Password: crackme

 

Thanks

Edited August 7, 2013 by RDGMax

[RDGMax]

 

Level 2:

 

Name: master131

Serial: 776D4A552F4B3343432B7467506A7479794A79474A673D3D

 

Note to RDGMax, your anti-debug method using NtQueryInformationProcess with the ProcessDebugObjectHandle and ProcessDebugPort flags isn't 64-bit/AnyCPU compatible because you've declared the P/Invoke signature incorrectly.

 

I didn't hardcode the byte array key to show that I actually did the reversing myself.

using System;

using System.IO;

using System.Security.Cryptography;

using System.Text;

using System.Windows.Forms;

namespace RDG_CrackMe_Level_2

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private byte[] GetKeyFromString(string value)

        {

            var bytes = new byte[8];

            var key = new byte[8];

            var encoding = new ASCIIEncoding();

            int charIndex = 0;

            encoding.GetBytes(value, charIndex, value.Length, bytes, charIndex);

            byte[] buffer2 = new SHA1CryptoServiceProvider().ComputeHash(bytes);

            charIndex = 0;

            do

            {

                key[charIndex] = buffer2[charIndex];

                charIndex++;

            } while (charIndex <= 7);

            return key;

        }

        public string Generate(string name)

        {

            return Sth(Se(name));

        }

        public string Sth(string StrToHex)

        {

            string str2 = string.Empty;

            for (int i = 1; i <= StrToHex.Length; i++)

            {

                string expression = ((int) StrToHex[i - 1]).ToString("X");

                if (expression.Length == 1) expression = "0" + expression;

                str2 += expression;

            }

            return str2;

        }

        public string Se(string strSource)

        {

            string str = string.Empty;

            var objDES = new DESCryptoServiceProvider();

            var Vector = new byte[] { 0x12, 0x44, 0x16, 0xEE, 0x88, 0x15, 0xDD, 0x41 };

            byte[] TheKey = GetKeyFromString("6889948"); // (0x18, 0x45, 0x53, 0x76, 0x57, 0xB7, 0x92, 0x6A)

            

            try

            {

                byte[] bytes = Encoding.UTF8.GetBytes(strSource);

                using (var stream = new MemoryStream())

                using (var stream2 = new CryptoStream(stream, objDES.CreateEncryptor(TheKey, Vector), CryptoStreamMode.Write))

                {

                    stream2.Write(bytes, 0, bytes.Length);

                    stream2.FlushFinalBlock();

                    str = Convert.ToBase64String(stream.ToArray());

                }

            }

            catch

            {

            }

            return str;

        }

        private void generateButton_Click(object sender, EventArgs e)

        {

            if (nameTextBox.Text.Length >= 6)

                serialTextBox.Text = Generate(nameTextBox.Text);

        }

    }

}

 

Has been compiled for x32 Bro

[LordCoder]

What obfuscator did you use to make repetitive functions and assigns? Or you coded all yourself?

[RDGMax]

What obfuscator did you use to make repetitive functions and assigns? Or you coded all yourself?

I used a stupid app for make garbage.. Crackme not hard bro.

Is Valid if you patch the crackme..if you get the serial number better

[LordCoder]

No I only asked what type of obfuscator you used because I love it. I will try to add for my future packer a copy of thousands of similar methods and stupid references

[RDGMax]

No I only asked what type of obfuscator you used because I love it. I will try to add for my future packer a copy of thousands of similar methods and stupid references

 

I not use external obfuscator bro.. only code

[master131]

Has been compiled for x32 Bro

 

Yes I know, but I'm just saying that if you compile it for x64 or AnyCPU it won't work.

[atom0s]

It works fine for me, I already cracked it via pm before he posted it live.

Edited August 8, 2013 by atom0s

[GIV]

Here is my try for level 1

Test.rar

[RDGMax]

It works fine for me, I already cracked it via pm before he posted it live.

 

Not same version bro.

[RDGMax]

Here is my try for level 1

 

Excellent.. you have to solve Level 3 now