import logging import random as rnd import lea import scapy.layers.inet as inet import scapy.utils import Attack.AttackParameters as atkParam import Attack.BaseAttack as BaseAttack import ID2TLib.SMBLib as SMBLib import ID2TLib.Utility as Util logging.getLogger("scapy.runtime").setLevel(logging.ERROR) # noinspection PyPep8 class MS17ScanAttack(BaseAttack.BaseAttack): template_scan_pcap_path = Util.RESOURCE_DIR + "Win7_eternalblue_scan.pcap" # Empirical values from Metasploit experiments minDefaultPort = 30000 maxDefaultPort = 50000 last_conn_dst_port = 4444 def __init__(self): """ Creates a new instance of the EternalBlue Exploit. """ # Initialize attack super(MS17ScanAttack, self).__init__("MS17ScanAttack", "Injects a MS17 scan'", "Scanning/Probing") self.pkt_num = 0 self.path_attack_pcap = None # Define allowed parameters and their type self.supported_params.update({ atkParam.Parameter.MAC_SOURCE: atkParam.ParameterTypes.TYPE_MAC_ADDRESS, atkParam.Parameter.IP_SOURCE: atkParam.ParameterTypes.TYPE_IP_ADDRESS, atkParam.Parameter.PORT_SOURCE: atkParam.ParameterTypes.TYPE_PORT, atkParam.Parameter.MAC_DESTINATION: atkParam.ParameterTypes.TYPE_MAC_ADDRESS, atkParam.Parameter.IP_DESTINATION: atkParam.ParameterTypes.TYPE_IP_ADDRESS, atkParam.Parameter.PORT_DESTINATION: atkParam.ParameterTypes.TYPE_PORT, atkParam.Parameter.INJECT_AT_TIMESTAMP: atkParam.ParameterTypes.TYPE_FLOAT, atkParam.Parameter.INJECT_AFTER_PACKET: atkParam.ParameterTypes.TYPE_PACKET_POSITION, atkParam.Parameter.PACKETS_PER_SECOND: atkParam.ParameterTypes.TYPE_FLOAT }) 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 utilsvalues # (values are overwritten if user specifies them) # Attacker configuration most_used_ip_address = self.statistics.get_most_used_ip_address() random_ip_address = self.statistics.get_random_ip_address() while random_ip_address == most_used_ip_address: random_ip_address = self.statistics.get_random_ip_address() self.add_param_value(atkParam.Parameter.IP_SOURCE, random_ip_address) self.add_param_value(atkParam.Parameter.MAC_SOURCE, self.statistics.get_mac_address(random_ip_address)) self.add_param_value(atkParam.Parameter.PORT_SOURCE, rnd.randint(self.minDefaultPort, self.maxDefaultPort)) # Victim configuration self.add_param_value(atkParam.Parameter.IP_DESTINATION, most_used_ip_address) destination_mac = self.statistics.get_mac_address(most_used_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, SMBLib.smb_port) # Attack configuration 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. """ # Timestamp timestamp_next_pkt = self.get_param_value(atkParam.Parameter.INJECT_AT_TIMESTAMP) pps = self.get_param_value(atkParam.Parameter.PACKETS_PER_SECOND) # calculate complement packet rates of BG traffic per interval complement_interval_pps = self.statistics.calculate_complement_packet_rates(pps) # Initialize parameters self.packets = [] mac_source = self.get_param_value(atkParam.Parameter.MAC_SOURCE) ip_source = self.get_param_value(atkParam.Parameter.IP_SOURCE) port_source = self.get_param_value(atkParam.Parameter.PORT_SOURCE) mac_destination = self.get_param_value(atkParam.Parameter.MAC_DESTINATION) ip_destination = self.get_param_value(atkParam.Parameter.IP_DESTINATION) port_destination = self.get_param_value(atkParam.Parameter.PORT_DESTINATION) # Check ip.src == ip.dst self.ip_src_dst_equal_check(ip_source, ip_destination) # 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_destination) 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) else: source_win_dist = self.statistics.get_win_distribution(self.statistics.get_most_used_ip_address()) source_win_prob_dict = lea.Lea.fromValFreqsDict(source_win_dist) destination_win_dist = self.statistics.get_win_distribution(ip_destination) if len(destination_win_dist) > 0: destination_win_prob_dict = lea.Lea.fromValFreqsDict(destination_win_dist) else: destination_win_dist = self.statistics.get_win_distribution(self.statistics.get_most_used_ip_address()) destination_win_prob_dict = lea.Lea.fromValFreqsDict(destination_win_dist) # Set MSS (Maximum Segment Size) based on MSS distribution of IP address mss_value = Util.handle_most_used_outputs(self.statistics.get_most_used_mss_value()) if not mss_value: mss_value = 1465 # Scan (MS17) # Read Win7_eternalblue_scan pcap file orig_ip_dst = None exploit_raw_packets = scapy.utils.RawPcapReader(self.template_scan_pcap_path) inter_arrival_times = self.get_inter_arrival_time(exploit_raw_packets) exploit_raw_packets.close() exploit_raw_packets = scapy.utils.RawPcapReader(self.template_scan_pcap_path) source_origin_wins, destination_origin_wins = {}, {} for self.pkt_num, pkt in enumerate(exploit_raw_packets): eth_frame = inet.Ether(pkt[0]) ip_pkt = eth_frame.payload tcp_pkt = ip_pkt.payload if self.pkt_num == 0: if tcp_pkt.getfieldval("dport") == SMBLib.smb_port: orig_ip_dst = ip_pkt.getfieldval("dst") # victim IP # Request if ip_pkt.getfieldval("dst") == orig_ip_dst: # victim IP # Ether eth_frame.setfieldval("src", mac_source) eth_frame.setfieldval("dst", mac_destination) # IP ip_pkt.setfieldval("src", ip_source) ip_pkt.setfieldval("dst", ip_destination) ip_pkt.setfieldval("ttl", source_ttl_value) # TCP tcp_pkt.setfieldval("sport", port_source) tcp_pkt.setfieldval("dport", port_destination) # Window Size (mapping) source_origin_win = tcp_pkt.getfieldval("window") if source_origin_win not in source_origin_wins: source_origin_wins[source_origin_win] = source_win_prob_dict.random() new_win = source_origin_wins[source_origin_win] tcp_pkt.setfieldval("window", new_win) # MSS tcp_options = tcp_pkt.getfieldval("options") if tcp_options: if tcp_options[0][0] == "MSS": tcp_options[0] = ("MSS", mss_value) tcp_pkt.setfieldval("options", tcp_options) new_pkt = (eth_frame / ip_pkt / tcp_pkt) new_pkt.time = timestamp_next_pkt pps = max(Util.get_interval_pps(complement_interval_pps, timestamp_next_pkt), 10) timestamp_next_pkt = Util.update_timestamp(timestamp_next_pkt, pps) + inter_arrival_times[ self.pkt_num] # float(timeSteps.random()) # Reply else: # Ether eth_frame.setfieldval("src", mac_destination) eth_frame.setfieldval("dst", mac_source) # IP ip_pkt.setfieldval("src", ip_destination) ip_pkt.setfieldval("dst", ip_source) ip_pkt.setfieldval("ttl", destination_ttl_value) # TCP tcp_pkt.setfieldval("dport", port_source) tcp_pkt.setfieldval("sport", port_destination) # Window Size destination_origin_win = tcp_pkt.getfieldval("window") if destination_origin_win not in destination_origin_wins: destination_origin_wins[destination_origin_win] = destination_win_prob_dict.random() new_win = destination_origin_wins[destination_origin_win] tcp_pkt.setfieldval("window", new_win) # MSS tcp_options = tcp_pkt.getfieldval("options") if tcp_options: if tcp_options[0][0] == "MSS": tcp_options[0] = ("MSS", mss_value) tcp_pkt.setfieldval("options", tcp_options) new_pkt = (eth_frame / ip_pkt / tcp_pkt) timestamp_next_pkt = Util.update_timestamp(timestamp_next_pkt, pps) + inter_arrival_times[ self.pkt_num] # + float(timeSteps.random()) new_pkt.time = timestamp_next_pkt self.packets.append(new_pkt) exploit_raw_packets.close() def generate_attack_pcap(self): """ Creates a pcap containing the attack packets. :return: The location of the generated pcap file. """ # Store timestamp of first packet (for attack label) self.attack_start_utime = self.packets[0].time self.attack_end_utime = self.packets[-1].time if len(self.packets) > 0: self.packets = sorted(self.packets, key=lambda pkt: pkt.time) self.path_attack_pcap = self.write_attack_pcap(self.packets, True, self.path_attack_pcap) # return packets sorted by packet time_sec_start # pkt_num+1: because pkt_num starts at 0 return self.pkt_num + 1, self.path_attack_pcap