[TuT]Making a Bruteforcer - Printable Version

[TuT]Making a Bruteforcer - Printable Version

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[TuT]Making a Bruteforcer - 1llusion - 03-18-2011

Hi!!!

Today you will (hopefully) learn how to make a bruteforcer in VB.NET

Its pretty simple once you get the system Smile

WARNING: VB.NET ISN'T a good language for bruteforcers since its slow, it will take ages to break more complex passes. Use C for some serious job Smile

So, lets start Smile

to prevent leachers, Ill make a console app that will just print the letters, but its pretty easy to make it into working bruteforcer Tongue

The code:

Code:
Module Module1

    Dim a As String = String.Empty

    Dim b As String = String.Empty

    Dim c As String = String.Empty

    Dim d As String = String.Empty

    Dim e As String = String.Empty

    Dim f As String = String.Empty

    Dim g As String = String.Empty

    Dim h As String = String.Empty

    Sub Bruteforce()

        For eigth = 97 To 122

            For seventh = 97 To 122

                For sixth = 97 To 122

                    For fifth = 97 To 122

                        For fourth = 97 To 122

                            For third = 97 To 122

                                For second As Integer = 97 To 122

                                    For first As Integer = 97 To 122

                                        a = Chr(first)

                                        Console.WriteLine(a & b & c & d & e & f & g & h)

                                    Next first

                                    b = Chr(second)

                                    Console.WriteLine(a & b & c & d & e & f & g & h)

                                Next second

                                c = Chr(third)

                                Console.WriteLine(a & b & c & d & e & f & g & h)

                            Next third

                            d = Chr(fourth)

                            Console.WriteLine(a & b & c & d & e & f & g & h)

                        Next fourth

                        e = Chr(fifth)

                        Console.WriteLine(a & b & c & d & e & f & g & h)

                    Next fifth

                    f = Chr(sixth)

                    Console.WriteLine(a & b & c & d & e & f & g & h)

                Next sixth

                g = Chr(seventh)

                Console.WriteLine(a & b & c & d & e & f & g & h)

            Next seventh

            h = Chr(eigth)

            Console.WriteLine(a & b & c & d & e & f & g & h)

        Next eigth

    End Sub

    Sub Main()

        Console.WriteLine("Press any key to start...")

        Console.ReadLine()

        Bruteforce()

    End Sub

End Module

Okay, so what does what:

Code:
Dim a As String = String.Empty

    Dim b As String = String.Empty

    Dim c As String = String.Empty

    Dim d As String = String.Empty

    Dim e As String = String.Empty

    Dim f As String = String.Empty

    Dim g As String = String.Empty

    Dim h As String = String.Empty

Public declarations, they can be private... I like them public, in case I need them somewhere else Smile

Code:
For first As Integer = 97 To 122

                                        a = Chr(first)

                                        Console.WriteLine(a & b & c & d & e & f & g & h)

                                    Next first

This sets an variable "first" as an integer. The variable has assigned a number: 97 for beginning, then it executes the code and moves to next number, this is repeated untill the number is 122, then in moves to next code, in our case another loop Smile

With the next loop, this one starts again.... and thats how the bruteforcing works Smile

Code:
Chr(first)

"Chr" is an ASCII character code, where the number in the brackets is the character number, Asc() does exactly the oposite Smile

Ok, now you should get the idea how it works, if you have any problem, just post it here =)

Alternative (faster) way by Coder-san:

Spoiler:

[TuT]Making a Bruteforcer - 1llusion - 03-18-2011

Hi!!!

Today you will (hopefully) learn how to make a bruteforcer in VB.NET

Its pretty simple once you get the system Smile

WARNING: VB.NET ISN'T a good language for bruteforcers since its slow, it will take ages to break more complex passes. Use C for some serious job Smile

So, lets start Smile

to prevent leachers, Ill make a console app that will just print the letters, but its pretty easy to make it into working bruteforcer Tongue

The code:

Code:
Module Module1

    Dim a As String = String.Empty

    Dim b As String = String.Empty

    Dim c As String = String.Empty

    Dim d As String = String.Empty

    Dim e As String = String.Empty

    Dim f As String = String.Empty

    Dim g As String = String.Empty

    Dim h As String = String.Empty

    Sub Bruteforce()

        For eigth = 97 To 122

            For seventh = 97 To 122

                For sixth = 97 To 122

                    For fifth = 97 To 122

                        For fourth = 97 To 122

                            For third = 97 To 122

                                For second As Integer = 97 To 122

                                    For first As Integer = 97 To 122

                                        a = Chr(first)

                                        Console.WriteLine(a & b & c & d & e & f & g & h)

                                    Next first

                                    b = Chr(second)

                                    Console.WriteLine(a & b & c & d & e & f & g & h)

                                Next second

                                c = Chr(third)

                                Console.WriteLine(a & b & c & d & e & f & g & h)

                            Next third

                            d = Chr(fourth)

                            Console.WriteLine(a & b & c & d & e & f & g & h)

                        Next fourth

                        e = Chr(fifth)

                        Console.WriteLine(a & b & c & d & e & f & g & h)

                    Next fifth

                    f = Chr(sixth)

                    Console.WriteLine(a & b & c & d & e & f & g & h)

                Next sixth

                g = Chr(seventh)

                Console.WriteLine(a & b & c & d & e & f & g & h)

            Next seventh

            h = Chr(eigth)

            Console.WriteLine(a & b & c & d & e & f & g & h)

        Next eigth

    End Sub

    Sub Main()

        Console.WriteLine("Press any key to start...")

        Console.ReadLine()

        Bruteforce()

    End Sub

End Module

Okay, so what does what:

Code:
Dim a As String = String.Empty

    Dim b As String = String.Empty

    Dim c As String = String.Empty

    Dim d As String = String.Empty

    Dim e As String = String.Empty

    Dim f As String = String.Empty

    Dim g As String = String.Empty

    Dim h As String = String.Empty

Public declarations, they can be private... I like them public, in case I need them somewhere else Smile

Code:
For first As Integer = 97 To 122

                                        a = Chr(first)

                                        Console.WriteLine(a & b & c & d & e & f & g & h)

                                    Next first

With the next loop, this one starts again.... and thats how the bruteforcing works Smile

Code:
Chr(first)

"Chr" is an ASCII character code, where the number in the brackets is the character number, Asc() does exactly the oposite Smile

Ok, now you should get the idea how it works, if you have any problem, just post it here =)

Alternative (faster) way by Coder-san:

Spoiler:

RE: [TuT]Making a Bruteforcer - Coder-san - 03-19-2011

Even though I agree that VB would be too slow for this, I have to say this code can be a lot more faster than it is now. Smile

Currently you have a huge loop running in a single thread which would hang the app, which can be ignored since this is a Tutorial, and a Programmer can find his way out.

Data-types you can change to increase speed and consume less memory:

Code:
Object (In 6 For Loops) -> Byte

Integer(In 2 For Loops) -> Byte

String (8 variables)       -> Char

You don't need to Console.WriteLine in every Loop, only in the most inner Loop (or just keep storing in a String variable).
Refreshing a Control slows down the Loop as well. I'm not sure if this would affect Commandline (It looks pretty cool though).

I'm assuming you knew most of them, I'm just mentioning this for others who will read the Thread.
Good Tutorial. Smile

RE: [TuT]Making a Bruteforcer - Coder-san - 03-19-2011

Even though I agree that VB would be too slow for this, I have to say this code can be a lot more faster than it is now. Smile

Code:
Object (In 6 For Loops) -> Byte

Integer(In 2 For Loops) -> Byte

String (8 variables)       -> Char

RE: [TuT]Making a Bruteforcer - 1llusion - 03-19-2011

(03-19-2011, 03:31 PM)Coder-san Wrote: Even though I agree that VB would be too slow for this, I have to say this code can be a lot more faster than it is now.

Currently you have a huge loop running in a single thread which would hang the app, which can be ignored since this is a Tutorial, and a Programmer can find his way out.

Data-types you can change to increase speed and consume less memory:

Code:
Object (In 6 For Loops) -> Byte Integer(In 2 For Loops) -> Byte String (8 variables) -> Char

You don't need to Console.WriteLine in every Loop, only in the most inner Loop (or just keep storing in a String variable).
Refreshing a Control slows down the Loop as well. I'm not sure if this would affect Commandline (It looks pretty cool though).

I'm assuming you knew most of them, I'm just mentioning this for others who will read the Thread.
Good Tutorial.

Well, the command line loops work a lot faster then with form, example: Cmd catches up form that was running for 10 mins in less then 30 secs.

Anyway, can you please explain me your idea? didn't really get it Biggrin

This loop idea came from my friend when he needed a quick bruteforcer and he got the idea while watching a clock Smile

Thanks!!!!

RE: [TuT]Making a Bruteforcer - 1llusion - 03-19-2011

(03-19-2011, 03:31 PM)Coder-san Wrote: Even though I agree that VB would be too slow for this, I have to say this code can be a lot more faster than it is now.

Currently you have a huge loop running in a single thread which would hang the app, which can be ignored since this is a Tutorial, and a Programmer can find his way out.

Data-types you can change to increase speed and consume less memory:

Code:
Object (In 6 For Loops) -> Byte Integer(In 2 For Loops) -> Byte String (8 variables) -> Char

You don't need to Console.WriteLine in every Loop, only in the most inner Loop (or just keep storing in a String variable).
Refreshing a Control slows down the Loop as well. I'm not sure if this would affect Commandline (It looks pretty cool though).

I'm assuming you knew most of them, I'm just mentioning this for others who will read the Thread.
Good Tutorial.

This loop idea came from my friend when he needed a quick bruteforcer and he got the idea while watching a clock Smile

Thanks!!!!

RE: [TuT]Making a Bruteforcer - Coder-san - 03-20-2011

Code:
Sub Bruteforce()

        'CheckForIllegalCrossThreadCalls = False         'For MultiThreading

        For eigth As Byte = 97 To 122

            For seventh As Byte = 97 To 122

                For sixth As Byte = 97 To 122

                    For fifth As Byte = 97 To 122

                        For fourth As Byte = 97 To 122

                            For third As Byte = 97 To 122

                                For second As Byte = 97 To 122

                                    For first As Byte = 97 To 122

                                        TextBox2.Text = Chr(first) & Chr(second) & Chr(third) & Chr(fourth) & Chr(fifth) & Chr(sixth) & Chr(seventh) & Chr(eigth)

                                    Next first

                                Next second

                            Next third

                        Next fourth

                    Next fifth

                Next sixth

            Next seventh

        Next eigth

    End Sub

This would do the same thing using less resources.
At some times, these optimizations don't matter much, but when these datatypes are inside multiple-loops they slow down the code too much.

A Bruteforce algorithm using a varied length is much trickier by the way. :p

RE: [TuT]Making a Bruteforcer - Coder-san - 03-20-2011

Code:
Sub Bruteforce()

        'CheckForIllegalCrossThreadCalls = False         'For MultiThreading

        For eigth As Byte = 97 To 122

            For seventh As Byte = 97 To 122

                For sixth As Byte = 97 To 122

                    For fifth As Byte = 97 To 122

                        For fourth As Byte = 97 To 122

                            For third As Byte = 97 To 122

                                For second As Byte = 97 To 122

                                    For first As Byte = 97 To 122

                                        TextBox2.Text = Chr(first) & Chr(second) & Chr(third) & Chr(fourth) & Chr(fifth) & Chr(sixth) & Chr(seventh) & Chr(eigth)

                                    Next first

                                Next second

                            Next third

                        Next fourth

                    Next fifth

                Next sixth

            Next seventh

        Next eigth

    End Sub

RE: [TuT]Making a Bruteforcer - 1llusion - 03-20-2011

(03-20-2011, 06:59 AM)Coder-san Wrote:
Code:
Sub Bruteforce() 'CheckForIllegalCrossThreadCalls = False 'For MultiThreading For eigth As Byte = 97 To 122 For seventh As Byte = 97 To 122 For sixth As Byte = 97 To 122 For fifth As Byte = 97 To 122 For fourth As Byte = 97 To 122 For third As Byte = 97 To 122 For second As Byte = 97 To 122 For first As Byte = 97 To 122 TextBox2.Text = Chr(first) & Chr(second) & Chr(third) & Chr(fourth) & Chr(fifth) & Chr(sixth) & Chr(seventh) & Chr(eigth) Next first Next second Next third Next fourth Next fifth Next sixth Next seventh Next eigth End Sub

This would do the same thing using less resources.
At some times, these optimizations don't matter much, but when these datatypes are inside multiple-loops they slow down the code too much.

A Bruteforce algorithm using a varied length is much trickier by the way. :p

oh cool =) I will add it to the OP as more efficient way Tongue

thanks for explaining Smile

EDIT: tested it and its like 2x faster then my code, with the difference that my code doesn all combinations from 1 to 8 characters and yours does just 8 characters Smile

RE: [TuT]Making a Bruteforcer - 1llusion - 03-20-2011

(03-20-2011, 06:59 AM)Coder-san Wrote:
Code:
Sub Bruteforce() 'CheckForIllegalCrossThreadCalls = False 'For MultiThreading For eigth As Byte = 97 To 122 For seventh As Byte = 97 To 122 For sixth As Byte = 97 To 122 For fifth As Byte = 97 To 122 For fourth As Byte = 97 To 122 For third As Byte = 97 To 122 For second As Byte = 97 To 122 For first As Byte = 97 To 122 TextBox2.Text = Chr(first) & Chr(second) & Chr(third) & Chr(fourth) & Chr(fifth) & Chr(sixth) & Chr(seventh) & Chr(eigth) Next first Next second Next third Next fourth Next fifth Next sixth Next seventh Next eigth End Sub

This would do the same thing using less resources.
At some times, these optimizations don't matter much, but when these datatypes are inside multiple-loops they slow down the code too much.

A Bruteforce algorithm using a varied length is much trickier by the way. :p

oh cool =) I will add it to the OP as more efficient way Tongue

thanks for explaining Smile

EDIT: tested it and its like 2x faster then my code, with the difference that my code doesn all combinations from 1 to 8 characters and yours does just 8 characters Smile