ID2T-toolkit/code/Attack/EternalBlueExploit.py

import logging
from random import randint, 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.utils import RawPcapReader
from scapy.layers.inet import IP, Ether, TCP, RandShort

class EternalBlueExploit(BaseAttack.BaseAttack):
    template_attack_pcap_path = "resources/Win7_eternalblue_scan.pcap"
    # SMB port
    smb_port = 445
    # Empirical values from Metasploit experiments
    minDefaultPort = 30000
    maxDefaultPort = 50000
    last_conn_dst_port = 4444

    def __init__(self, statistics, pcap_file_path):
        """
        Creates a new instance of the EternalBlue Exploit.

        :param statistics: A reference to the statistics class.
        """
        # Initialize attack
        super(EternalBlueExploit, self).__init__(statistics, "EternalBlue Exploit", "Injects an EternalBlue exploit'",
                                        "Resource Exhaustion")

        # Define allowed parameters and their type
        self.supported_params = {
            Param.MAC_SOURCE: ParameterTypes.TYPE_MAC_ADDRESS,
            Param.IP_SOURCE: ParameterTypes.TYPE_IP_ADDRESS,
            Param.MAC_DESTINATION: ParameterTypes.TYPE_MAC_ADDRESS,
            Param.IP_DESTINATION: ParameterTypes.TYPE_IP_ADDRESS,
            Param.INJECT_AT_TIMESTAMP: ParameterTypes.TYPE_FLOAT,
            Param.INJECT_AFTER_PACKET: ParameterTypes.TYPE_PACKET_POSITION,
            Param.PACKETS_PER_SECOND: ParameterTypes.TYPE_FLOAT
        }

        # PARAMETERS: initialize with default utilsvalues
        # (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))
        self.add_param_value(Param.INJECT_AFTER_PACKET, randint(0, self.statistics.get_packet_count()))
        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)

        # 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)

    def generate_attack_pcap(self):
        def update_timestamp(timestamp, pps):
            """
            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.
            """
            # Calculate the request timestamp
            # A distribution 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())

        def getIntervalPPS(complement_interval_pps, timestamp):
            """
            Gets the packet rate (pps) in specific time interval.

            :return: the corresponding packet rate for 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

        # Timestamp
        timestamp_next_pkt = self.get_param_value(Param.INJECT_AT_TIMESTAMP)
        pps = self.get_param_value(Param.PACKETS_PER_SECOND)

        # calculate complement packet rates of BG traffic per interval
        complement_interval_pps = self.statistics.calculate_complement_packet_rates(pps)

        # Initialize parameters
        packets = []
        mac_source = self.get_param_value(Param.MAC_SOURCE)
        ip_source = self.get_param_value(Param.IP_SOURCE)
        mac_destination = self.get_param_value(Param.MAC_DESTINATION)
        ip_destination = self.get_param_value(Param.IP_DESTINATION)

        # check ip.src == ip.dst
        self.ip_src_dst_equal_check(ip_source, ip_destination)

        path_attack_pcap = None
        minDelay, maxDelay = self.get_reply_delay(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.fromValFreqsDict(source_ttl_dist)
            source_ttl_value = source_ttl_prob_dict.random()
        else:
            source_ttl_value = self.statistics.process_db_query("most_used(ttlValue)")

        destination_ttl_dist = self.statistics.get_ttl_distribution(ip_destination)
        if len(destination_ttl_dist) > 0:
            destination_ttl_prob_dict = Lea.fromValFreqsDict(destination_ttl_dist)
            destination_ttl_value = destination_ttl_prob_dict.random()
        else:
            destination_ttl_value = self.statistics.process_db_query("most_used(ttlValue)")

        # Scan (MS17) for EternalBlue
        # Read Win7_eternalblue_scan_vulnerable pcap file
        orig_ip_dst = None
        exploit_raw_packets = RawPcapReader(self.template_attack_pcap_path)
        inter_arrival_time_dist = self.get_inter_arrival_time_dist(exploit_raw_packets)
        timeSteps = Lea.fromValFreqsDict(inter_arrival_time_dist)
        exploit_raw_packets = RawPcapReader(self.template_attack_pcap_path)

        port_source = randint(self.minDefaultPort,self.maxDefaultPort) # experiments show this range of ports

        for pkt_num, pkt in enumerate(exploit_raw_packets):
            eth_frame = Ether(pkt[0])
            ip_pkt = eth_frame.payload
            tcp_pkt = ip_pkt.payload

            if pkt_num == 0:
                if tcp_pkt.getfieldval("dport") == self.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)

                new_pkt = (eth_frame / ip_pkt / tcp_pkt)
                new_pkt.time = timestamp_next_pkt

                pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
                timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + 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)

                new_pkt = (eth_frame / ip_pkt / tcp_pkt)
                timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + float(timeSteps.random())
                new_pkt.time = timestamp_next_pkt

            packets.append(new_pkt)


        # Inject EternalBlue exploit packets
        # Read Win7_eternalblue_exploit pcap file
        exploit_raw_packets = RawPcapReader("resources/Win7_eternalblue_exploit.pcap")

        port_source = randint(self.minDefaultPort,self.maxDefaultPort) # experiments show this range of ports
        # conversations = {(ip.src, ip.dst, port.src, port.dst): packets}
        conversations, orderList_conversations = self.packetsToConvs(exploit_raw_packets)

        conv_start_timesamp = timestamp_next_pkt
        for conv_index, conv in enumerate(orderList_conversations):
            conv_start_timesamp = conv_start_timesamp + uniform(0.001,0.01) # the distance between the starts of the converstaions
            timestamp_next_pkt = conv_start_timesamp

            conv_pkts = conversations[conv]
            inter_arrival_time_dist = self.get_inter_arrival_time_dist(conv_pkts)
            timeSteps = Lea.fromValFreqsDict(inter_arrival_time_dist)

            if conv_index == len(orderList_conversations) - 2:  # Not the last conversation
                timestamp_next_pkt = packets[-1].time + uniform(0.001,0.01)

            if conv_index != len(orderList_conversations)-1: # Not the last conversation
                port_source += 2
                for pkt_num, pkt in enumerate(conv_pkts):
                    eth_frame = Ether(pkt[0])
                    ip_pkt = eth_frame.payload
                    tcp_pkt = ip_pkt.payload

                    if pkt_num == 0:
                        if tcp_pkt.getfieldval("dport") == self.smb_port:
                            orig_ip_dst = ip_pkt.getfieldval("dst")

                    # defining req/rep should be adapted to fit the last converstaion where
                    # victim starts a connection with the attacker
                    # 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)
                        new_pkt = (eth_frame / ip_pkt / tcp_pkt)
                        new_pkt.time = timestamp_next_pkt

                        pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
                        timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + 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)
                        new_pkt = (eth_frame / ip_pkt / tcp_pkt)

                        pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
                        timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + float(timeSteps.random())

                        new_pkt.time = timestamp_next_pkt

                    packets.append(new_pkt)

            else: # Last conversation where the victim start a connection with the attacker
                timestamp_next_pkt = packets[-1].time + uniform(0.001, 0.01)
                port_source = randint(self.minDefaultPort,self.maxDefaultPort)
                for pkt_num, pkt in enumerate(conv_pkts):
                    eth_frame = Ether(pkt[0])
                    ip_pkt = eth_frame.payload
                    tcp_pkt = ip_pkt.payload

                    # defining req/rep should be adapted to fit the last converstaion where
                    # victim start a connection with the attacker
                    # Request
                    if tcp_pkt.getfieldval("dport") == self.last_conn_dst_port:
                        # 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("sport", port_source)
                        new_pkt = (eth_frame / ip_pkt / tcp_pkt)
                        new_pkt.time = timestamp_next_pkt

                        pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
                        timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + float(timeSteps.random())

                    # Reply
                    else:
                        # 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("dport", port_source)
                        new_pkt = (eth_frame / ip_pkt / tcp_pkt)

                        pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
                        timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + float(timeSteps.random())

                        new_pkt.time = timestamp_next_pkt

                    packets.append(new_pkt)


        # Store timestamp of first packet (for attack label)
        self.attack_start_utime = packets[0].time
        self.attack_end_utime = packets[-1].time

        if len(packets) > 0:
            packets = sorted(packets, key=lambda pkt: pkt.time)
            path_attack_pcap = self.write_attack_pcap(packets, True, path_attack_pcap)

        # return packets sorted by packet time_sec_start
        # pkt_num+1: because pkt_num starts at 0
        return pkt_num + 1, path_attack_pcap