import logging import random as rnd import lea import scapy.layers.inet as inet import Attack.AttackParameters as atkParam import Attack.BaseAttack as BaseAttack import ID2TLib.Utility as Util logging.getLogger("scapy.runtime").setLevel(logging.ERROR) # noinspection PyPep8 class PortscanAttack(BaseAttack.BaseAttack): def __init__(self): """ Creates a new instance of the PortscanAttack. This attack injects TCP Syn-requests and respective responses into the output pcap file. """ # Initialize attack super(PortscanAttack, self).__init__("Portscan Attack", "Injects a nmap 'regular scan'", "Scanning/Probing") # Define allowed parameters and their type self.supported_params.update({ atkParam.Parameter.IP_SOURCE: atkParam.ParameterTypes.TYPE_IP_ADDRESS, atkParam.Parameter.IP_DESTINATION: atkParam.ParameterTypes.TYPE_IP_ADDRESS, atkParam.Parameter.PORT_SOURCE: atkParam.ParameterTypes.TYPE_PORT, atkParam.Parameter.PORT_DESTINATION: atkParam.ParameterTypes.TYPE_PORT, atkParam.Parameter.PORT_OPEN: atkParam.ParameterTypes.TYPE_PORT, atkParam.Parameter.MAC_SOURCE: atkParam.ParameterTypes.TYPE_MAC_ADDRESS, atkParam.Parameter.MAC_DESTINATION: atkParam.ParameterTypes.TYPE_MAC_ADDRESS, atkParam.Parameter.INJECT_AT_TIMESTAMP: atkParam.ParameterTypes.TYPE_FLOAT, atkParam.Parameter.INJECT_AFTER_PACKET: atkParam.ParameterTypes.TYPE_PACKET_POSITION, atkParam.Parameter.PORT_DEST_SHUFFLE: atkParam.ParameterTypes.TYPE_BOOLEAN, atkParam.Parameter.PORT_DEST_ORDER_DESC: atkParam.ParameterTypes.TYPE_BOOLEAN, atkParam.Parameter.IP_SOURCE_RANDOMIZE: atkParam.ParameterTypes.TYPE_BOOLEAN, atkParam.Parameter.PACKETS_PER_SECOND: atkParam.ParameterTypes.TYPE_FLOAT, atkParam.Parameter.PORT_SOURCE_RANDOMIZE: atkParam.ParameterTypes.TYPE_BOOLEAN }) 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. """ # PARAMETERS: initialize with default values # (values are overwritten if user specifies them) most_used_ip_address = self.statistics.get_most_used_ip_address() self.add_param_value(atkParam.Parameter.IP_SOURCE, most_used_ip_address) self.add_param_value(atkParam.Parameter.IP_SOURCE_RANDOMIZE, 'False') self.add_param_value(atkParam.Parameter.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(atkParam.Parameter.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(atkParam.Parameter.MAC_DESTINATION, destination_mac) self.add_param_value(atkParam.Parameter.PORT_DESTINATION, self.get_ports_from_nmap_service_dst(1000)) self.add_param_value(atkParam.Parameter.PORT_OPEN, '1') self.add_param_value(atkParam.Parameter.PORT_DEST_SHUFFLE, 'False') self.add_param_value(atkParam.Parameter.PORT_DEST_ORDER_DESC, 'False') self.add_param_value(atkParam.Parameter.PORT_SOURCE, rnd.randint(1024, 65535)) self.add_param_value(atkParam.Parameter.PORT_SOURCE_RANDOMIZE, 'False') self.add_param_value(atkParam.Parameter.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(atkParam.Parameter.INJECT_AFTER_PACKET, rnd.randint(0, self.statistics.get_packet_count())) def generate_attack_packets(self): """ Creates the attack packets. """ mac_source = self.get_param_value(atkParam.Parameter.MAC_SOURCE) mac_destination = self.get_param_value(atkParam.Parameter.MAC_DESTINATION) pps = self.get_param_value(atkParam.Parameter.PACKETS_PER_SECOND) # Calculate complement packet rates of the background traffic for each interval complement_interval_pps = self.statistics.calculate_complement_packet_rates(pps) # Determine ports dest_ports = self.get_param_value(atkParam.Parameter.PORT_DESTINATION) if self.get_param_value(atkParam.Parameter.PORT_DEST_ORDER_DESC): dest_ports.reverse() elif self.get_param_value(atkParam.Parameter.PORT_DEST_SHUFFLE): rnd.shuffle(dest_ports) if self.get_param_value(atkParam.Parameter.PORT_SOURCE_RANDOMIZE): # FIXME: why is sport never used? sport = rnd.randint(1, 65535) else: sport = self.get_param_value(atkParam.Parameter.PORT_SOURCE) # Timestamp timestamp_next_pkt = self.get_param_value(atkParam.Parameter.INJECT_AT_TIMESTAMP) # store start time of attack self.attack_start_utime = timestamp_next_pkt timestamp_prv_reply, timestamp_confirm = 0, 0 # Initialize parameters self.packets = [] ip_source = self.get_param_value(atkParam.Parameter.IP_SOURCE) if isinstance(ip_source, list): ip_source = ip_source[0] ip_destination = self.get_param_value(atkParam.Parameter.IP_DESTINATION) if not isinstance(ip_destination, list): ip_destination = [ip_destination] # Check ip.src == ip.dst self.ip_src_dst_equal_check(ip_source, ip_destination) for ip in ip_destination: # Select open ports ports_open = self.get_param_value(atkParam.Parameter.PORT_OPEN) if ports_open == 1: # user did not specify open ports # the ports that were already used by ip.dst (direction in) in the background traffic are open ports ports_used_by_ip_dst = self.statistics.process_db_query( "SELECT portNumber FROM ip_ports WHERE portDirection='in' AND ipAddress='" + ip + "'") if ports_used_by_ip_dst: ports_open = ports_used_by_ip_dst else: # if no ports were retrieved from database # Take open ports from nmap-service file # ports_temp = self.get_ports_from_nmap_service_dst(100) # ports_open = ports_temp[0:rnd.randint(1,10)] # OR take open ports from the most used ports in traffic statistics ports_open = self.statistics.process_db_query( "SELECT portNumber FROM ip_ports GROUP BY portNumber ORDER BY SUM(portCount) DESC LIMIT " + str( rnd.randint(1, 10))) # in case of one open port, convert ports_open to array if not isinstance(ports_open, list): ports_open = [ports_open] # Set MSS (Maximum Segment Size) based on MSS distribution of IP address source_mss_dist = self.statistics.get_mss_distribution(ip_source) if len(source_mss_dist) > 0: source_mss_prob_dict = lea.Lea.fromValFreqsDict(source_mss_dist) source_mss_value = source_mss_prob_dict.random() else: source_mss_value = Util.handle_most_used_outputs(self.statistics.get_most_used_mss_value()) destination_mss_dist = self.statistics.get_mss_distribution(ip) if len(destination_mss_dist) > 0: destination_mss_prob_dict = lea.Lea.fromValFreqsDict(destination_mss_dist) destination_mss_value = destination_mss_prob_dict.random() else: destination_mss_value = Util.handle_most_used_outputs(self.statistics.get_most_used_mss_value()) # Set TTL based on TTL distribution of IP address source_ttl_dist = self.statistics.get_ttl_distribution(ip_source) if len(source_ttl_dist) > 0: source_ttl_prob_dict = lea.Lea.fromValFreqsDict(source_ttl_dist) source_ttl_value = source_ttl_prob_dict.random() else: source_ttl_value = Util.handle_most_used_outputs(self.statistics.get_most_used_ttl_value()) destination_ttl_dist = self.statistics.get_ttl_distribution(ip) if len(destination_ttl_dist) > 0: destination_ttl_prob_dict = lea.Lea.fromValFreqsDict(destination_ttl_dist) destination_ttl_value = destination_ttl_prob_dict.random() else: destination_ttl_value = Util.handle_most_used_outputs(self.statistics.get_most_used_ttl_value()) # Set Window Size based on Window Size distribution of IP address source_win_dist = self.statistics.get_win_distribution(ip_source) if len(source_win_dist) > 0: source_win_prob_dict = lea.Lea.fromValFreqsDict(source_win_dist) source_win_value = source_win_prob_dict.random() else: source_win_value = Util.handle_most_used_outputs(self.statistics.get_most_used_win_size()) destination_win_dist = self.statistics.get_win_distribution(ip) if len(destination_win_dist) > 0: destination_win_prob_dict = lea.Lea.fromValFreqsDict(destination_win_dist) destination_win_value = destination_win_prob_dict.random() else: destination_win_value = Util.handle_most_used_outputs(self.statistics.get_most_used_win_size()) min_delay, max_delay = self.get_reply_delay(ip) for dport in dest_ports: # Parameters changing each iteration if self.get_param_value(atkParam.Parameter.IP_SOURCE_RANDOMIZE) and isinstance(ip_source, list): ip_source = rnd.choice(ip_source) # 1) Build request package request_ether = inet.Ether(src=mac_source, dst=mac_destination) request_ip = inet.IP(src=ip_source, dst=ip, ttl=source_ttl_value) # Random src port for each packet sport = rnd.randint(1, 65535) request_tcp = inet.TCP(sport=sport, dport=dport, window=source_win_value, flags='S', options=[('MSS', source_mss_value)]) request = (request_ether / request_ip / request_tcp) request.time = timestamp_next_pkt # Append request self.packets.append(request) # 2) Build reply (for open ports) package if dport in ports_open: # destination port is OPEN reply_ether = inet.Ether(src=mac_destination, dst=mac_source) reply_ip = inet.IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF') reply_tcp = inet.TCP(sport=dport, dport=sport, seq=0, ack=1, flags='SA', window=destination_win_value, options=[('MSS', destination_mss_value)]) reply = (reply_ether / reply_ip / reply_tcp) timestamp_reply = Util.update_timestamp(timestamp_next_pkt, pps, min_delay) while timestamp_reply <= timestamp_prv_reply: timestamp_reply = Util.update_timestamp(timestamp_prv_reply, pps, min_delay) timestamp_prv_reply = timestamp_reply reply.time = timestamp_reply self.packets.append(reply) # requester confirms confirm_ether = request_ether confirm_ip = request_ip confirm_tcp = inet.TCP(sport=sport, dport=dport, seq=1, window=0, flags='R') confirm = (confirm_ether / confirm_ip / confirm_tcp) timestamp_confirm = Util.update_timestamp(timestamp_reply, pps, min_delay) confirm.time = timestamp_confirm self.packets.append(confirm) # else: destination port is NOT OPEN -> no reply is sent by target pps = max(Util.get_interval_pps(complement_interval_pps, timestamp_next_pkt), 10) timestamp_next_pkt = Util.update_timestamp(timestamp_next_pkt, pps) def generate_attack_pcap(self): """ Creates a pcap containing the attack packets. :return: The location of the generated pcap file. """ # store end time of attack self.attack_end_utime = self.packets[-1].time # write attack packets to pcap pcap_path = self.write_attack_pcap(sorted(self.packets, key=lambda pkt: pkt.time)) # return packets sorted by packet time_sec_start return len(self.packets), pcap_path