137 lines
4.2 KiB
Ruby
137 lines
4.2 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require "net/dns/resolver"
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require 'rex'
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class MetasploitModule < Msf::Auxiliary
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include Msf::Module::Deprecated
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include Msf::Auxiliary::Report
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deprecated(Date.new(2016, 6, 12), 'auxiliary/gather/enum_dns')
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'DNS Reverse Lookup Enumeration',
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'Description' => %q{
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This module performs DNS reverse lookup against a given IP range in order to
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retrieve valid addresses and names.
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},
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'Author' =>
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[
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'Carlos Perez <carlos_perez[at]darkoperator.com>', # Base code
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'Thanat0s <thanspam[at]trollprod.org>' # Output, Throttling & Db notes add
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],
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'License' => BSD_LICENSE
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))
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register_options(
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[
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OptAddressRange.new('RANGE', [true, 'IP range to perform reverse lookup against.']),
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OptAddress.new('NS', [ false, "Specify the nameserver to use for queries, otherwise use the system DNS." ]),
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OptString.new('OUT_FILE', [ false, "Specify a CSV output file" ])
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], self.class)
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register_advanced_options(
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[
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OptInt.new('RETRY', [ false, "Number of tries to resolve a record if no response is received.", 2]),
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OptInt.new('RETRY_INTERVAL', [ false, "Number of seconds to wait before doing a retry.", 2]),
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OptInt.new('THREADS', [ true, "The number of concurrent threads.", 1]),
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OptInt.new('THROTTLE', [ false, "Specify the resolution throttle in query per sec. 0 means unthrottled",0 ])
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], self.class)
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end
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def run
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@res = Net::DNS::Resolver.new()
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if datastore['RETRY']
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@res.retry = datastore['RETRY'].to_i
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end
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if datastore['RETRY_INTERVAL']
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@res.retry_interval = datastore['RETRY_INTERVAL'].to_i
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end
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@threadnum = datastore['THREADS'].to_i
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switchdns() unless datastore['NS'].nil?
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reverselkp(datastore['RANGE'])
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end
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def reverselkp(iprange)
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print_status("Running reverse lookup against IP range #{iprange}")
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ar = Rex::Socket::RangeWalker.new(iprange)
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tl = []
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# Basic Throttling
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sleep_time = 0.0
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if (datastore['THROTTLE'] != 0)
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sleep_time = (1.0/datastore['THROTTLE'])*datastore['THREADS']
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print_status("Throttle set to #{datastore['THROTTLE']} queries per seconds")
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end
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# Output..
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if datastore['OUT_FILE']
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print_status("Scan result saved in #{datastore['OUT_FILE']}")
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open(datastore['OUT_FILE'], 'w') do |f|
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f.puts "; IP, Host"
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end
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end
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while (true)
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# Spawn threads for each host
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hosts = Hash.new
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while (tl.length <= @threadnum)
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ip = ar.next_ip
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break if not ip
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tl << framework.threads.spawn("Module(#{self.refname})-#{ip}", false, ip.dup) do |tip|
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begin
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Rex.sleep(sleep_time)
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query = @res.query(tip)
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query.each_ptr do |addresstp|
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print_status("Host Name: #{addresstp}, IP Address: #{tip.to_s}")
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if datastore['OUT_FILE']
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open(datastore['OUT_FILE'], 'a') do |f|
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f.puts "#{tip.to_s},#{addresstp}"
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end
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end
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report_host(
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:host => tip.to_s,
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:name => addresstp
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)
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if !hosts[tip]
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hosts[tip] = Array.new
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end
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hosts[tip].push addresstp
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end
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unless hosts[tip].nil? or hosts[tip].empty?
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report_note(
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:host => tip.to_s,
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:type => "RDNS_Record",
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:data => hosts[tip]
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)
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end
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rescue ::Interrupt
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raise $!
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rescue ::Rex::ConnectionError
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rescue ::Exception => e
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print_error("Error: #{tip}: #{e.message}")
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end
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end
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end
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# Exit once we run out of hosts
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if(tl.length == 0)
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break
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end
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tl.first.join
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tl.delete_if { |t| not t.alive? }
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end
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end
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def switchdns()
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print_status("Using DNS server: #{datastore['NS']}")
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@res.nameserver=(datastore['NS'])
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@nsinuse = datastore['NS']
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end
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end
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