add SMBLoris Attack

code/Attack/SMBLorisAttack.py

@@ -0,0 +1,245 @@
+import logging
+import csv
+
+from random import shuffle, randint, choice, uniform
+
+from lea import Lea
+
+from Attack import BaseAttack
+from Attack.AttackParameters import Parameter as Param
+from Attack.AttackParameters import ParameterTypes
+
+logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
+# noinspection PyPep8
+from scapy.layers.inet import IP, Ether, TCP
+from scapy.layers.netbios import NBTSession
+
+# Resources:
+# https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/smb/smb_loris.rb
+# https://samsclass.info/124/proj14/smbl.htm
+# https://gist.githubusercontent.com/marcan/6a2d14b0e3eaa5de1795a763fb58641e/raw/565befecf4d9a4a27248d027a90b6e3e5994b5b6/smbloris.c
+# http://smbloris.com/
+
+class SMBLorisAttack(BaseAttack.BaseAttack):
+    # SMB port
+    smb_port = 445
+
+    def __init__(self):
+        """
+        Creates a new instance of the SMBLorisAttack.
+
+        """
+        # Initialize attack
+        super(SMBLorisAttack, self).__init__("SMBLoris Attack", "Injects an SMBLoris DoS Attack",
+                                             "Resource Exhaustion")
+
+        # Define allowed parameters and their type
+        self.supported_params = {
+            Param.IP_SOURCE: ParameterTypes.TYPE_IP_ADDRESS,
+            Param.IP_DESTINATION: ParameterTypes.TYPE_IP_ADDRESS,
+            Param.MAC_SOURCE: ParameterTypes.TYPE_MAC_ADDRESS,
+            Param.MAC_DESTINATION: ParameterTypes.TYPE_MAC_ADDRESS,
+            Param.INJECT_AT_TIMESTAMP: ParameterTypes.TYPE_FLOAT,
+            Param.INJECT_AFTER_PACKET: ParameterTypes.TYPE_PACKET_POSITION,
+            Param.PACKETS_PER_SECOND: ParameterTypes.TYPE_FLOAT,
+            Param.ATTACK_DURATION: ParameterTypes.TYPE_INTEGER_POSITIVE
+        }
+
+    def init_params(self):
+        """
+        Initialize the parameters of this attack using the user supplied command line parameters.
+        Use the provided statistics to calculate default parameters and to process user
+        supplied queries.
+
+        :param statistics: Reference to a statistics object.
+        """
+        # PARAMETERS: initialize with default values
+        # (values are overwritten if user specifies them)
+        most_used_ip_address = self.statistics.get_most_used_ip_address()
+        if isinstance(most_used_ip_address, list):
+            most_used_ip_address = most_used_ip_address[0]
+
+        self.add_param_value(Param.IP_SOURCE, most_used_ip_address)
+        self.add_param_value(Param.MAC_SOURCE, self.statistics.get_mac_address(most_used_ip_address))
+
+        random_ip_address = self.statistics.get_random_ip_address()
+        # ip-dst should be valid and not equal to ip.src
+        while not self.is_valid_ip_address(random_ip_address) or random_ip_address==most_used_ip_address:
+            random_ip_address = self.statistics.get_random_ip_address()
+
+        self.add_param_value(Param.IP_DESTINATION, random_ip_address)
+        destination_mac = self.statistics.get_mac_address(random_ip_address)
+        if isinstance(destination_mac, list) and len(destination_mac) == 0:
+            destination_mac = self.generate_random_mac_address()
+        self.add_param_value(Param.MAC_DESTINATION, destination_mac)
+        self.add_param_value(Param.PACKETS_PER_SECOND,
+                             (self.statistics.get_pps_sent(most_used_ip_address) +
+                              self.statistics.get_pps_received(most_used_ip_address)) / 2)
+        self.add_param_value(Param.INJECT_AFTER_PACKET, randint(0, self.statistics.get_packet_count()))
+        self.add_param_value(Param.ATTACK_DURATION, 30)
+
+    def generate_attack_pcap(self):
+        def update_timestamp(timestamp, pps, delay=0):
+            """
+            Calculates the next timestamp to be used based on the packet per second rate (pps) and the maximum delay.
+
+            :return: Timestamp to be used for the next packet.
+            """
+            if delay == 0:
+                # Calculate request timestamp
+                # To imitate the bursty behavior of traffic
+                randomdelay = Lea.fromValFreqsDict({1 / pps: 70, 2 / pps: 20, 5 / pps: 7, 10 / pps: 3})
+                return timestamp + uniform(1/pps ,  randomdelay.random())
+            else:
+                # Calculate reply timestamp
+                randomdelay = Lea.fromValFreqsDict({2*delay: 70, 3*delay: 20, 5*delay: 7, 10*delay: 3})
+                return timestamp + uniform(1 / pps + delay,  1 / pps + randomdelay.random())
+
+        def getIntervalPPS(complement_interval_pps, timestamp):
+            """
+            Gets the packet rate (pps) for a specific time interval.
+
+            :param complement_interval_pps: an array of tuples (the last timestamp in the interval, the packet rate in the crresponding interval).
+            :param timestamp: the timestamp at which the packet rate is required.
+            :return: the corresponding packet rate (pps) .
+            """
+            for row in complement_interval_pps:
+                if timestamp<=row[0]:
+                    return row[1]
+            return complement_interval_pps[-1][1] # in case the timstamp > capture max timestamp
+
+        def getIpData(ip_address: str):
+            """
+            :param ip_address: the ip of which (packet-)data shall be returned
+            :return: MSS, TTL and Window Size values of the given IP
+            """
+            # Set MSS (Maximum Segment Size) based on MSS distribution of IP address
+            mss_dist = self.statistics.get_mss_distribution(ip_address)
+            if len(mss_dist) > 0:
+                mss_prob_dict = Lea.fromValFreqsDict(mss_dist)
+                mss_value = mss_prob_dict.random()
+            else:
+                mss_value = self.statistics.process_db_query("most_used(mssValue)")
+
+            # Set TTL based on TTL distribution of IP address
+            ttl_dist = self.statistics.get_ttl_distribution(ip_address)
+            if len(ttl_dist) > 0:
+                ttl_prob_dict = Lea.fromValFreqsDict(ttl_dist)
+                ttl_value = ttl_prob_dict.random()
+            else:
+                ttl_value = self.statistics.process_db_query("most_used(ttlValue)")
+
+            # Set Window Size based on Window Size distribution of IP address
+            win_dist = self.statistics.get_win_distribution(ip_address)
+            if len(win_dist) > 0:
+                win_prob_dict = Lea.fromValFreqsDict(win_dist)
+                win_value = win_prob_dict.random()
+            else:
+                win_value = self.statistics.process_db_query("most_used(winSize)")
+
+            return mss_value, ttl_value, win_value
+
+        mac_source = self.get_param_value(Param.MAC_SOURCE)
+        mac_destination = self.get_param_value(Param.MAC_DESTINATION)
+        pps = self.get_param_value(Param.PACKETS_PER_SECOND)
+
+        # Calculate complement packet rates of the background traffic for each interval
+        complement_interval_pps = self.statistics.calculate_complement_packet_rates(pps)
+
+        # Timestamp
+        timestamp_next_pkt = self.get_param_value(Param.INJECT_AT_TIMESTAMP)
+        # store start time of attack
+        self.attack_start_utime = timestamp_next_pkt
+        timestamp_prv_reply, timestamp_confirm = 0,0
+
+        # Initialize parameters
+        packets = []
+        ip_source = self.get_param_value(Param.IP_SOURCE)
+        ip_destination = self.get_param_value(Param.IP_DESTINATION)
+
+        # Check ip.src == ip.dst
+        self.ip_src_dst_equal_check(ip_source, ip_destination)
+
+        # Get MSS, TTL and Window size value for source and destination IP
+        source_mss_value, source_ttl_value, source_win_value = getIpData(ip_source)
+        destination_mss_value, destination_ttl_value, destination_win_value = getIpData(ip_destination)
+
+        minDelay,maxDelay = self.get_reply_delay(ip_destination)
+
+        attack_duration = self.get_param_value(Param.ATTACK_DURATION)
+        attack_ends_time = timestamp_next_pkt + attack_duration
+
+        sport = 1025
+
+        attacker_seq = randint(1000, 50000)
+        victim_seq = randint(1000, 50000)
+
+        # FIXME: Improve timestamp generation
+        while timestamp_next_pkt <= attack_ends_time:
+            # Establish TCP connection
+            if sport > 65535:
+                sport = 1025
+
+            # prepare reusable Ethernet- and IP-headers
+            attacker_ether = Ether(src=mac_source, dst=mac_destination)
+            attacker_ip = IP(src=ip_source, dst=ip_destination, ttl=source_ttl_value, flags='DF')
+            victim_ether = Ether(src=mac_destination, dst=mac_source)
+            victim_ip = IP(src=ip_destination, dst=ip_source, ttl=destination_ttl_value, flags='DF')
+
+            # connection request from attacker (client)
+            syn_tcp = TCP(sport=sport, dport=self.smb_port, window=source_win_value, flags='S',
+                          seq=attacker_seq, options=[('MSS', source_mss_value)])
+            attacker_seq += 1
+            syn = (attacker_ether / attacker_ip / syn_tcp)
+            syn.time = timestamp_next_pkt
+            timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, minDelay)
+            packets.append(syn)
+
+            # response from victim (server)
+            synack_tcp = TCP(sport=self.smb_port, dport=sport, seq=victim_seq, ack=attacker_seq, flags='SA',
+                             window=destination_win_value, options=[('MSS', destination_mss_value)])
+            victim_seq += 1
+            synack = (victim_ether / victim_ip / synack_tcp)
+            synack.time = timestamp_next_pkt
+            timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, minDelay)
+            packets.append(synack)
+
+            # acknowledgement from attacker (client)
+            ack_tcp = TCP(sport=sport, dport=self.smb_port, seq=attacker_seq, ack=victim_seq, flags='A',
+                          window=source_win_value, options=[('MSS', source_mss_value)])
+            ack = (attacker_ether / attacker_ip / ack_tcp)
+            ack.time = timestamp_next_pkt
+            timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, minDelay)
+            packets.append(ack)
+
+            # send NBT session header paket with maximum LENGTH-field
+            req_tcp = TCP(sport=sport, dport=self.smb_port, seq=attacker_seq, ack=victim_seq, flags='AP',
+                          window=source_win_value, options=[('MSS', source_mss_value)])
+            req_payload = NBTSession(TYPE=0x00, LENGTH=0x1FFFF)
+
+            attacker_seq += len(req_payload)
+            req = (attacker_ether / attacker_ip / req_tcp / req_payload)
+            req.time = timestamp_next_pkt
+            timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, minDelay)
+            packets.append(req)
+
+            # final ack from victim (server)
+            last_ack_tcp = TCP(sport=self.smb_port, dport=sport, seq=victim_seq, ack=attacker_seq, flags='A',
+                               window=destination_win_value, options=[('MSS', destination_mss_value)])
+            last_ack = (victim_ether / victim_ip / last_ack_tcp)
+            last_ack.time = timestamp_next_pkt
+            timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, minDelay)
+            packets.append(last_ack)
+
+            sport += 1
+
+            # FIXME: RST?
+
+        # store end time of attack
+        self.attack_end_utime = packets[-1].time
+
+        # write attack packets to pcap
+        pcap_path = self.write_attack_pcap(sorted(packets, key=lambda pkt: pkt.time))
+
+        # return packets sorted by packet time_sec_start
+        return len(packets), pcap_path