import logging 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 class PortscanAttack(BaseAttack.BaseAttack): def __init__(self, statistics, pcap_file_path): """ Creates a new instance of the PortscanAttack. :param statistics: A reference to the statistics class. """ # Initialize attack super(PortscanAttack, self).__init__(statistics, "Portscan Attack", "Injects a nmap 'regular scan'", "Scanning/Probing") # Define allowed parameters and their type self.supported_params = { Param.IP_SOURCE: ParameterTypes.TYPE_IP_ADDRESS, Param.IP_DESTINATION: ParameterTypes.TYPE_IP_ADDRESS, Param.PORT_SOURCE: ParameterTypes.TYPE_PORT, Param.PORT_DESTINATION: ParameterTypes.TYPE_PORT, Param.PORT_OPEN: ParameterTypes.TYPE_PORT, 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.PORT_DEST_SHUFFLE: ParameterTypes.TYPE_BOOLEAN, Param.PORT_DEST_ORDER_DESC: ParameterTypes.TYPE_BOOLEAN, Param.IP_SOURCE_RANDOMIZE: ParameterTypes.TYPE_BOOLEAN, Param.PACKETS_PER_SECOND: ParameterTypes.TYPE_FLOAT, Param.PORT_SOURCE_RANDOMIZE: ParameterTypes.TYPE_BOOLEAN } # 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.IP_SOURCE_RANDOMIZE, 'False') 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() self.add_param_value(Param.IP_DESTINATION, random_ip_address) self.add_param_value(Param.MAC_DESTINATION, self.statistics.get_mac_address(random_ip_address)) self.add_param_value(Param.PORT_DESTINATION, '0-1023,1720,1900,8080') self.add_param_value(Param.PORT_OPEN, '8080,9232,9233') self.add_param_value(Param.PORT_DEST_SHUFFLE, 'False') self.add_param_value(Param.PORT_DEST_ORDER_DESC, 'False') self.add_param_value(Param.PORT_SOURCE, '8542') self.add_param_value(Param.PORT_SOURCE_RANDOMIZE, 'False') 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())) def get_packets(self): def update_timestamp(timestamp, pps, maxdelay): """ 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. """ return timestamp + uniform(0.1 / pps, maxdelay) # Determine ports dest_ports = self.get_param_value(Param.PORT_DESTINATION) if self.get_param_value(Param.PORT_DEST_ORDER_DESC): dest_ports.reverse() elif self.get_param_value(Param.PORT_DEST_SHUFFLE): shuffle(dest_ports) if self.get_param_value(Param.PORT_SOURCE_RANDOMIZE): sport = randint(0, 65535) else: sport = self.get_param_value(Param.PORT_SOURCE) # Timestamp timestamp_next_pkt = self.get_param_value(Param.INJECT_AT_TIMESTAMP) # store start time of attack self.attack_start_utime = timestamp_next_pkt # Initialize parameters packets = [] ip_source = self.get_param_value(Param.IP_SOURCE) ip_destination = self.get_param_value(Param.IP_DESTINATION) 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) randomdelay = Lea.fromValFreqsDict({1 / pps: 70, 2 / pps: 30, 5 / pps: 15, 10 / pps: 3}) maxdelay = randomdelay.random() # MSS (Maximum Segment Size) for Ethernet. Allowed values [536,1500] mss = self.statistics.get_mss(ip_destination) # Set TTL based on TTL distribution of IP address ttl_dist = self.statistics.get_ttl_distribution(ip_source) 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)") for dport in dest_ports: # Parameters changing each iteration if self.get_param_value(Param.IP_SOURCE_RANDOMIZE) and isinstance(ip_source, list): ip_source = choice(ip_source) # 1) Build request package request_ether = Ether(src=mac_source, dst=mac_destination) request_ip = IP(src=ip_source, dst=ip_destination, ttl=ttl_value) request_tcp = TCP(sport=sport, dport=dport, flags='S') request = (request_ether / request_ip / request_tcp) # first packet uses timestamp provided by attack parameter Param.INJECT_AT_TIMESTAMP if len(packets) > 0: timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, maxdelay) request.time = timestamp_next_pkt packets.append(request) # 2) Build reply package if dport in self.get_param_value(Param.PORT_OPEN): # destination port is OPEN reply_ether = Ether(src=mac_destination, dst=mac_source) reply_ip = IP(src=ip_destination, dst=ip_source, flags='DF') # target answers if mss is None: reply_tcp = TCP(sport=dport, dport=sport, seq=0, ack=1, flags='SA', window=29200) else: reply_tcp = TCP(sport=dport, dport=sport, seq=0, ack=1, flags='SA', window=29200, options=[('MSS', mss)]) reply = (reply_ether / reply_ip / reply_tcp) timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, maxdelay) reply.time = timestamp_next_pkt packets.append(reply) # requester confirms confirm_ether = request_ether confirm_ip = request_ip confirm_tcp = TCP(sport=sport, dport=dport, seq=1, window=0, flags='R') reply = (confirm_ether / confirm_ip / confirm_tcp) timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, maxdelay) reply.time = timestamp_next_pkt packets.append(reply) # else: destination port is NOT OPEN -> no reply is sent by target # store end time of attack self.attack_end_utime = reply.time # return packets sorted by packet time_sec_start return sorted(packets, key=lambda pkt: pkt.time)