import logging # Aidmar import math from random import randint, uniform from scipy.stats._discrete_distns import randint_gen from threading import _MainThread from lea import Lea from scipy.stats import gamma 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, RandShort from collections import deque class DDoSAttack(BaseAttack.BaseAttack): def __init__(self, statistics, pcap_file_path): """ Creates a new instance of the DDoS attack. :param statistics: A reference to the statistics class. """ # Initialize attack super(DDoSAttack, self).__init__(statistics, "DDoS Attack", "Injects a DDoS attack'", "Resource Exhaustion") # Define allowed parameters and their type self.supported_params = { Param.IP_SOURCE: ParameterTypes.TYPE_IP_ADDRESS, Param.MAC_SOURCE: ParameterTypes.TYPE_MAC_ADDRESS, Param.PORT_SOURCE: ParameterTypes.TYPE_PORT, Param.IP_DESTINATION: ParameterTypes.TYPE_IP_ADDRESS, Param.MAC_DESTINATION: ParameterTypes.TYPE_MAC_ADDRESS, Param.PORT_DESTINATION: ParameterTypes.TYPE_PORT, Param.INJECT_AT_TIMESTAMP: ParameterTypes.TYPE_FLOAT, Param.INJECT_AFTER_PACKET: ParameterTypes.TYPE_PACKET_POSITION, Param.PACKETS_PER_SECOND: ParameterTypes.TYPE_FLOAT, Param.PACKETS_LIMIT: ParameterTypes.TYPE_INTEGER_POSITIVE, Param.NUMBER_ATTACKERS: ParameterTypes.TYPE_INTEGER_POSITIVE } # PARAMETERS: initialize with default values # (values are overwritten if user specifies them) self.add_param_value(Param.INJECT_AFTER_PACKET, randint(0, self.statistics.get_packet_count())) # attacker configuration num_attackers = randint(1, 16) self.add_param_value(Param.IP_SOURCE, self.generate_random_ipv4_address(num_attackers)) self.add_param_value(Param.MAC_SOURCE, self.generate_random_mac_address(num_attackers)) self.add_param_value(Param.PORT_SOURCE, str(RandShort())) """ # Aidmar - PPS = avg packet rate per host = avgPacketsSentPerHost / captureDuration max_pkts_sent_per_host = self.statistics.process_db_query( "SELECT MAX(pktsSent) FROM ip_statistics;") print("\nmax_pkts_sent_per_host: %f" % (max_pkts_sent_per_host)) capture_duration = self.statistics.process_db_query( "SELECT captureDuration FROM file_statistics;") max_pkt_rate_per_host = max_pkts_sent_per_host/float(capture_duration) print("\nmax_pkt_rate_per_host: %f" % (max_pkt_rate_per_host)) #num_attackers = self.get_param_value(Param.NUMBER_ATTACKERS) # the minumum PPS is the maximum packet rate per host * attackers number min_pps = math.floor(max_pkt_rate_per_host * int(num_attackers)) print("\nMIN PPS: %f" % (min_pps)) self.add_param_value(Param.PACKETS_PER_SECOND, randint(min_pps, 64)) """ self.add_param_value(Param.PACKETS_PER_SECOND, randint(1, 64)) # victim configuration 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) """port_destination = self.statistics.process_db_query( "SELECT portNumber FROM ip_ports WHERE portDirection='in' ORDER BY RANDOM() LIMIT 1;") if port_destination is None: port_destination = str(RandShort()) self.add_param_value(Param.PORT_DESTINATION, port_destination)""" self.add_param_value(Param.PACKETS_LIMIT, randint(1000, 5000)) def generate_attack_pcap(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) def get_nth_random_element(*element_list): """ Returns the n-th element of every list from an arbitrary number of given lists. For example, list1 contains IP addresses, list 2 contains MAC addresses. Use of this function ensures that the n-th IP address uses always the n-th MAC address. :param element_list: An arbitrary number of lists. :return: A tuple of the n-th element of every list. """ range_max = min([len(x) for x in element_list]) if range_max > 0: range_max -= 1 n = randint(0, range_max) return tuple(x[n] for x in element_list) def index_increment(number: int, max: int): if number + 1 < max: return number + 1 else: return 0 def get_attacker_config(ipAddress: str): """ Returns the attacker configuration depending on the IP address, this includes the port for the next attacking packet and the previously used (fixed) TTL value. :param ipAddress: The IP address of the attacker :return: A tuple consisting of (port, ttlValue) """ # Determine port port = attacker_port_mapping.get(ipAddress) if port is not None: # use next port next_port = attacker_port_mapping.get(ipAddress) + 1 if next_port > (2 ** 16 - 1): next_port = 1 else: # generate starting port next_port = RandShort() attacker_port_mapping[ipAddress] = next_port # Determine TTL value ttl = attacker_ttl_mapping.get(ipAddress) if ttl is None: # determine TTL value is_invalid = True pos = ip_source_list.index(ipAddress) pos_max = len(gd) while is_invalid: ttl = int(round(gd[pos])) if 0 < ttl < 256: # validity check is_invalid = False else: pos = index_increment(pos, pos_max) attacker_ttl_mapping[ipAddress] = ttl # return port and TTL return next_port, ttl BUFFER_SIZE = 1000 # Determine source IP and MAC address num_attackers = self.get_param_value(Param.NUMBER_ATTACKERS) if num_attackers is not None: # user supplied Param.NUMBER_ATTACKERS # Create random attackers based on user input Param.NUMBER_ATTACKERS ip_source_list = self.generate_random_ipv4_address(num_attackers) mac_source_list = self.generate_random_mac_address(num_attackers) else: # user did not supply Param.NUMBER_ATTACKS # use default values for IP_SOURCE/MAC_SOURCE or overwritten values # if user supplied any values for those params ip_source_list = self.get_param_value(Param.IP_SOURCE) mac_source_list = self.get_param_value(Param.MAC_SOURCE) # Timestamp timestamp_next_pkt = self.get_param_value(Param.INJECT_AT_TIMESTAMP) pps = self.get_param_value(Param.PACKETS_PER_SECOND) randomdelay = Lea.fromValFreqsDict({1 / pps: 70, 2 / pps: 30, 5 / pps: 15, 10 / pps: 3}) # Initialize parameters packets = deque(maxlen=BUFFER_SIZE) port_source_list = self.get_param_value(Param.PORT_SOURCE) mac_destination = self.get_param_value(Param.MAC_DESTINATION) ip_destination = self.get_param_value(Param.IP_DESTINATION) # Aidmar - attack an open port of ip.dst port_destination = self.statistics.process_db_query( "SELECT portNumber FROM ip_ports WHERE portDirection='in' AND ipAddress='"+ip_destination+"' ORDER BY RANDOM() LIMIT 1;") if not port_destination: port_destination = str(RandShort()) self.add_param_value(Param.PORT_DESTINATION, port_destination) # ============================================================================================================== port_destination = self.get_param_value(Param.PORT_DESTINATION) attacker_port_mapping = {} attacker_ttl_mapping = {} # Gamma distribution parameters derived from MAWI 13.8G dataset alpha, loc, beta = (2.3261710235, -0.188306914406, 44.4853123884) gd = gamma.rvs(alpha, loc=loc, scale=beta, size=len(ip_source_list)) path_attack_pcap = None for pkt_num in range(self.get_param_value(Param.PACKETS_LIMIT)): # Select one IP address and its corresponding MAC address (ip_source, mac_source) = get_nth_random_element(ip_source_list, mac_source_list) # Determine source port (port_source, ttl_value) = get_attacker_config(ip_source) maxdelay = randomdelay.random() request_ether = Ether(dst=mac_destination, src=mac_source) request_ip = IP(src=ip_source, dst=ip_destination, ttl=ttl_value) # Aidmar - random win size for each packet #request_tcp = TCP(sport=port_source, dport=port_destination, flags='S', ack=0) # Win size starts usually with 1 MSS, find the most used MSS in the traffic and use it as min, while max is 8192 = default scapy win size # TO-DO: find most mSS used in traffic request_tcp = TCP(sport=port_source, dport=port_destination, flags='S', ack=0, window=randint(1460,8192)) # ========================================================================================================= request = (request_ether / request_ip / request_tcp) request.time = timestamp_next_pkt packets.append(request) timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, maxdelay) # Store timestamp of first packet (for attack label) if pkt_num == 1: self.attack_start_utime = packets[0].time elif pkt_num % BUFFER_SIZE == 0: last_packet = packets[-1] packets = sorted(packets, key=lambda pkt: pkt.time) path_attack_pcap = self.write_attack_pcap(packets, True, path_attack_pcap) packets = [] if len(packets) > 0: packets = sorted(packets, key=lambda pkt: pkt.time) path_attack_pcap = self.write_attack_pcap(packets, True, path_attack_pcap) # Store timestamp of last packet self.attack_end_utime = last_packet.time # return packets sorted by packet time_sec_start # pkt_num+1: because pkt_num starts at 0 return pkt_num + 1, path_attack_pcap