metasploit-framework/modules/post/multi/gather/dns_reverse_lookup.rb

##
# ## This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'
require 'rex'
require 'msf/core/post/common'


class Metasploit3 < Msf::Post

	include Msf::Post::Common


	def initialize(info={})
		super( update_info( info,
				'Name'          => 'Multi Gather DNS Reverse Lookup Scan',
				'Description'   => %q{
					Performs DNS reverse lookup using the OS included DNS query command.
				},
				'License'       => MSF_LICENSE,
				'Author'        => [ 'Carlos Perez <carlos_perez[at]darkoperator.com>'],
				'Platform'      => [ 'win','linux', 'osx', 'bsd', 'solaris' ],
				'SessionTypes'  => [ 'meterpreter', 'shell' ]
			))
		register_options(
			[

				OptAddressRange.new('RHOSTS', [true, 'IP Range to perform reverse lookup against.'])

			], self.class)
	end

	# Run Method for when run command is issued
	def run
		iprange = datastore['RHOSTS']
		print_status("Performing DNS Reverse Lookup for IP range #{iprange}")
		iplst = []

		a = []
		ipadd = Rex::Socket::RangeWalker.new(iprange)
		numip = ipadd.num_ips
		while (iplst.length < numip)
			ipa = ipadd.next_ip
			if (not ipa)
				break
			end
			iplst << ipa
		end

		if session.type =~ /shell/
			# Only one thread possible when shell
			thread_num = 1
			# Use the shell platform for selecting the command
			platform = session.platform
		else
			# When in Meterpreter the safest thread number is 10
			thread_num = 10
			# For Meterpreter use the sysinfo OS since java Meterpreter returns java as platform
			platform = session.sys.config.sysinfo['OS']
		end

		platform = session.platform

		case platform
		when /win/i
			cmd = "nslookup"
		when /solaris/i
			cmd = "/usr/sbin/host"
		else
			cmd = "/usr/bin/host"
		end
		while(not iplst.nil? and not iplst.empty?)
			1.upto(thread_num) do
				a << framework.threads.spawn("Module(#{self.refname})", false, iplst.shift) do |ip_add|
					next if ip_add.nil?
					r = cmd_exec(cmd, " #{ip_add}")
					case platform
					when /win/
						if r =~ /(Name)/
							r.scan(/Name:\s*\S*\s/) do |n|
								hostname = n.split(":    ")
								print_good "\t #{ip_add} is #{hostname[1].chomp("\n")}"
								report_host({
									:host => ip_add,
									:name => hostname[1].strip
									})
							end
						else
							vprint_status("#{ip_add} does not have a Reverse Lookup Record")
						end
					else
						if r !~ /not found/i
							hostname = r.scan(/domain name pointer (\S*)\./).join
							print_good "\t #{ip_add} is #{hostname}"
							report_host({
									:host => ip_add,
									:name => hostname.strip
								})
						else
							vprint_status("#{ip_add} does not have a Reverse Lookup Record")
						end
					end
				end
				a.map {|x| x.join }
			end
		end
	end
end