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Brute Force

, 15 May 2009 CPOL
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Brute Force algorithm with MD5 & SHA Hashing


This is my attempt to create a brute force algorithm that can use any hash or encryption standard.


Bruteforcing has been around for some time now, but it is mostly found in a pre-built application that performs only one function. My attempt to bruteforcing started when I forgot a password to an archived rar file. I decided to create a bruteforce algorithm that can be used in a plug-and-play manner. At the moment, the basic hashing algorithms (MD5 & SHA) are supported but nothing stops you from using it to brute a Microsoft SQL password (* using pwdencrypt and pwdcompare).

Using the Code

Using the method is straight forward. Set up your character and password array and call the brute() or bruteUI() method.

//Password array
string[] passwordArray;
//Lowercare character array
string[] lower = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", 
	"n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z" };
//Uppercase character array
string[] upper = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", 
	"N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };
//Digits array
string[] digits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" }; 

private void setupCharArray()
   if (ckhLower.Checked)

   if (chkUpper.Checked)

   if (chkDigits.Checked)

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)

Points of Interest

An MD5 and SHA Hash class make it easy to choose a hash type. While your PC is bruting away, a CPU monitor shows you the load on the system.


  • 15th May, 2009: Initial post

This is my first attempt to Bruteforcing and like I said it is expandable to many other hash types and encryption standards.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Pieter Alec Myburgh
Software Developer (Senior) Process Computing Technology
South Africa South Africa
Senior Software Engineer & Manager.
I reject your code and substitute my own!
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Comments and Discussions

GeneralThoughts PinmemberPIEBALDconsult7-Mar-14 3:15 
QuestionOKok it works, but.. PinmemberMember 106481687-Mar-14 3:12 
Questionnot working PinmemberANIMESH SHAW1-Apr-13 19:25 
QuestionTried for MD5, didn't work properly [modified] PinmemberShukhrat Nekbaev20-Dec-12 3:10 
AnswerRe: Tried for MD5, didn't work properly PinmemberLinoxxis16-Jan-13 23:47 
Questionstart true to arrive the the truth Pinmemberibrahim_ragab5-Nov-12 8:43 
QuestionIt works but you cant use it for like hotmail or something? Pinmemberswerdiofire13-Nov-11 2:34 
GeneralMy vote of 4 Pinmemberc4th0d38-Oct-11 4:23 
GeneralRe: My vote of 4 PinmemberCodeKrash28-Aug-12 17:19 
GeneralMy vote of 4 PinmemberUhlume28-Sep-11 11:19 
QuestionWrong Average PW/sec Calculation PinmemberMember 81486429-Aug-11 10:14 
GeneralSymmetries PinadminChris Maunder15-May-09 15:51 
GeneralRe: Symmetries PinmemberLinoxxis3-Dec-09 23:25 
Jokewanted to say hi! PinmembereRRaTuM15-May-09 15:22 
GeneralRe: wanted to say hi! PinmemberMember 103700801-Apr-14 7:30 
GeneralHehe... Pinmemberaxelriet15-May-09 12:50 

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