import logging from random import shuffle, randint from lea import Lea from scapy.layers.inet import IP, Ether, TCP from scapy.layers.smb import * from scapy.layers.netbios import * from Attack import BaseAttack from Attack.AttackParameters import Parameter as Param from Attack.AttackParameters import ParameterTypes from ID2TLib.SMB2 import * from ID2TLib.Utility import update_timestamp, get_interval_pps, get_ip_range,\ generate_source_port_from_platform, get_filetime_format import ID2TLib.Utility from ID2TLib.SMBLib import smb_port, smb_versions, smb_dialects, get_smb_version, get_smb_platform_data,\ invalid_smb_version logging.getLogger("scapy.runtime").setLevel(logging.ERROR) # noinspection PyPep8 class SMBScanAttack(BaseAttack.BaseAttack): def __init__(self): """ Creates a new instance of the SMBScanAttack. """ # Initialize attack super(SMBScanAttack, self).__init__("SmbScan Attack", "Injects an SMB 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.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.IP_SOURCE_RANDOMIZE: ParameterTypes.TYPE_BOOLEAN, Param.PACKETS_PER_SECOND: ParameterTypes.TYPE_FLOAT, Param.PORT_SOURCE_RANDOMIZE: ParameterTypes.TYPE_BOOLEAN, Param.HOSTING_IP: ParameterTypes.TYPE_IP_ADDRESS, Param.HOSTING_VERSION: ParameterTypes.TYPE_STRING, Param.SOURCE_PLATFORM: ParameterTypes.TYPE_STRING, Param.PROTOCOL_VERSION: ParameterTypes.TYPE_STRING, Param.IP_DESTINATION_END: ParameterTypes.TYPE_IP_ADDRESS } 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. :param statistics: Reference to a statistics object. """ # 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)) all_ips = self.statistics.get_ip_addresses() if not isinstance(all_ips, list): ip_destinations = [] ip_destinations.append(all_ips) else: ip_destinations = all_ips self.add_param_value(Param.IP_DESTINATION, ip_destinations) destination_mac = [] for ip in ip_destinations: destination_mac.append(self.statistics.get_mac_address(str(ip))) 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) self.add_param_value(Param.PORT_SOURCE, randint(1024, 65535)) self.add_param_value(Param.PORT_SOURCE_RANDOMIZE, 'True') 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())) rnd_ip_count = self.statistics.get_ip_address_count()//2 self.add_param_value(Param.HOSTING_IP, self.statistics.get_random_ip_address(rnd_ip_count)) self.host_os = ID2TLib.Utility.get_rnd_os() self.add_param_value(Param.HOSTING_VERSION, get_smb_version(platform=self.host_os)) self.add_param_value(Param.SOURCE_PLATFORM, ID2TLib.Utility.get_rnd_os()) self.add_param_value(Param.PROTOCOL_VERSION, "1") self.add_param_value(Param.IP_DESTINATION_END, "0.0.0.0") def generate_attack_pcap(self): def get_ip_data(ip_address: str): """ Gets the MSS, TTL and Windows Size values of a given IP :param ip_address: the ip of which (packet-)data shall be returned :return: MSS, TTL and Window Size values of the given IP """ # Set MSS (Maximum Segment Size) based on MSS distribution of IP address mss_dist = self.statistics.get_mss_distribution(ip_address) if len(mss_dist) > 0: mss_prob_dict = Lea.fromValFreqsDict(mss_dist) mss_value = mss_prob_dict.random() else: mss_value = self.statistics.process_db_query("most_used(mssValue)") # Set TTL based on TTL distribution of IP address ttl_dist = self.statistics.get_ttl_distribution(ip_address) 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)") # Set Window Size based on Window Size distribution of IP address win_dist = self.statistics.get_win_distribution(ip_address) if len(win_dist) > 0: win_prob_dict = Lea.fromValFreqsDict(win_dist) win_value = win_prob_dict.random() else: win_value = self.statistics.process_db_query("most_used(winSize)") return mss_value, ttl_value, win_value pps = self.get_param_value(Param.PACKETS_PER_SECOND) # Calculate complement packet rates of the background traffic for each interval complement_interval_pps = self.statistics.calculate_complement_packet_rates(pps) # Timestamp timestamp_next_pkt = self.get_param_value(Param.INJECT_AT_TIMESTAMP) # store start time of attack self.attack_start_utime = timestamp_next_pkt timestamp_prv_reply, timestamp_confirm = 0,0 # Initialize parameters ip_source = self.get_param_value(Param.IP_SOURCE) ip_destinations = self.get_param_value(Param.IP_DESTINATION) hosting_ip = self.get_param_value(Param.HOSTING_IP) ip_range_end = self.get_param_value(Param.IP_DESTINATION_END) mac_source = self.get_param_value(Param.MAC_SOURCE) mac_dest = self.get_param_value(Param.MAC_DESTINATION) # Check smb version smb_version = self.get_param_value(Param.PROTOCOL_VERSION) if smb_version not in smb_versions: invalid_smb_version(smb_version) hosting_version = self.get_param_value(Param.HOSTING_VERSION) if hosting_version not in smb_versions: invalid_smb_version(hosting_version) # Check source platform src_platform = self.get_param_value(Param.SOURCE_PLATFORM).lower() packets = [] # randomize source ports according to platform, if specified if self.get_param_value(Param.PORT_SOURCE_RANDOMIZE): sport = generate_source_port_from_platform(src_platform) else: sport = self.get_param_value(Param.PORT_SOURCE) # No destination IP was specified, but a destination MAC was specified, generate IP that fits MAC if isinstance(ip_destinations, list) and isinstance(mac_dest, str): ip_destinations = self.statistics.get_ip_address_from_mac(mac_dest) if len(ip_destinations) == 0: ip_destinations = self.generate_random_ipv4_address("Unknown", 1) # Check ip.src == ip.dst self.ip_src_dst_equal_check(ip_source, ip_destinations) ip_dests = [] if isinstance(ip_destinations, list): ip_dests = ip_destinations else: ip_dests.append(ip_destinations) # Generate IPs of destination IP range, if specified if ip_range_end != "0.0.0.0": ip_dests = get_ip_range(ip_dests[0], ip_range_end) shuffle(ip_dests) # Randomize source IP, if specified if self.get_param_value(Param.IP_SOURCE_RANDOMIZE): ip_source = self.generate_random_ipv4_address("Unknown", 1) while ip_source in ip_dests: ip_source = self.generate_random_ipv4_address("Unknown", 1) mac_source = self.statistics.get_mac_address(str(ip_source)) if len(mac_source) == 0: mac_source = self.generate_random_mac_address() # Get MSS, TTL and Window size value for source IP source_mss_value, source_ttl_value, source_win_value = get_ip_data(ip_source) for ip in ip_dests: if ip != ip_source: # Get destination Mac Address mac_destination = self.statistics.get_mac_address(str(ip)) if len(mac_destination) == 0: if isinstance(mac_dest, str): if len(self.statistics.get_ip_address_from_mac(mac_dest)) != 0: ip = self.statistics.get_ip_address_from_mac(mac_dest) self.ip_src_dst_equal_check(ip_source, ip) mac_destination = mac_dest else: mac_destination = self.generate_random_mac_address() # Get MSS, TTL and Window size value for destination IP destination_mss_value, destination_ttl_value, destination_win_value = get_ip_data(ip) minDelay, maxDelay = self.get_reply_delay(ip) # New connection, new random TCP sequence numbers attacker_seq = randint(1000, 50000) victim_seq = randint(1000, 50000) # Randomize source port for each connection if specified if self.get_param_value(Param.PORT_SOURCE_RANDOMIZE): sport = generate_source_port_from_platform(src_platform, sport) # 1) Build request package request_ether = Ether(src=mac_source, dst=mac_destination) request_ip = IP(src=ip_source, dst=ip, ttl=source_ttl_value, flags='DF') request_tcp = TCP(sport=sport, dport=smb_port, window=source_win_value, flags='S', seq=attacker_seq, options=[('MSS', source_mss_value)]) attacker_seq += 1 request = (request_ether / request_ip / request_tcp) request.time = timestamp_next_pkt # Append request packets.append(request) # Update timestamp for next package timestamp_reply = update_timestamp(timestamp_next_pkt, pps, minDelay) while (timestamp_reply <= timestamp_prv_reply): timestamp_reply = update_timestamp(timestamp_prv_reply, pps, minDelay) timestamp_prv_reply = timestamp_reply if ip in hosting_ip: # 2) Build TCP packages for ip that hosts SMB # destination sends SYN, ACK reply_ether = Ether(src=mac_destination, dst=mac_source) reply_ip = IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF') reply_tcp = TCP(sport=smb_port, dport=sport, seq=victim_seq, ack=attacker_seq, flags='SA', window=destination_win_value, options=[('MSS', destination_mss_value)]) victim_seq += 1 reply = (reply_ether / reply_ip / reply_tcp) reply.time = timestamp_reply packets.append(reply) # requester confirms, ACK confirm_ether = request_ether confirm_ip = request_ip confirm_tcp = TCP(sport=sport, dport=smb_port, seq=attacker_seq, ack=victim_seq, window=source_win_value, flags='A') confirm = (confirm_ether / confirm_ip / confirm_tcp) timestamp_confirm = update_timestamp(timestamp_reply, pps, minDelay) confirm.time = timestamp_confirm packets.append(confirm) smb_MID = randint(1, 65535) smb_PID = randint(1, 65535) smb_req_tail_arr = [] smb_req_tail_size = 0 # select dialects based on smb version if smb_version is "1": smb_req_dialects = smb_dialects[0:6] else: smb_req_dialects = smb_dialects if len(smb_req_dialects) == 0: smb_req_tail_arr.append(SMBNegociate_Protocol_Request_Tail()) smb_req_tail_size = len(SMBNegociate_Protocol_Request_Tail()) else: for dia in smb_req_dialects: smb_req_tail_arr.append(SMBNegociate_Protocol_Request_Tail(BufferData = dia)) smb_req_tail_size += len(SMBNegociate_Protocol_Request_Tail(BufferData = dia)) smb_req_head = SMBNegociate_Protocol_Request_Header\ (Flags2=0x2801, PID=smb_PID, MID=smb_MID, ByteCount=smb_req_tail_size) smb_req_length = len(smb_req_head) + smb_req_tail_size smb_req_net_bio = NBTSession(TYPE=0x00, LENGTH=smb_req_length) smb_req_tcp = TCP(sport=sport, dport=smb_port, flags='PA', seq=attacker_seq, ack=victim_seq) smb_req_ip = IP(src=ip_source, dst=ip, ttl=source_ttl_value) smb_req_ether = Ether(src=mac_source, dst=mac_destination) attacker_seq += len(smb_req_net_bio) + len(smb_req_head) + smb_req_tail_size smb_req_combined = (smb_req_ether / smb_req_ip / smb_req_tcp / smb_req_net_bio / smb_req_head) for i in range(0 , len(smb_req_tail_arr)): smb_req_combined = smb_req_combined / smb_req_tail_arr[i] timestamp_smb_req = update_timestamp(timestamp_confirm, pps, minDelay) smb_req_combined.time = timestamp_smb_req packets.append(smb_req_combined) # destination confirms SMB request package reply_tcp = TCP(sport=smb_port, dport=sport, seq=victim_seq, ack=attacker_seq, window=destination_win_value, flags='A') confirm_smb_req = (reply_ether / reply_ip / reply_tcp) timestamp_reply = update_timestamp(timestamp_smb_req, pps, minDelay) confirm_smb_req.time = timestamp_reply packets.append(confirm_smb_req) # smb response package first_timestamp = time.mktime(time.strptime(self.statistics.get_pcap_timestamp_start()[:19], "%Y-%m-%d %H:%M:%S")) server_Guid, security_blob, capabilities, data_size, server_start_time = get_smb_platform_data\ (self.host_os, first_timestamp) timestamp_smb_rsp = update_timestamp(timestamp_reply, pps, minDelay) diff = timestamp_smb_rsp - timestamp_smb_req begin = get_filetime_format(timestamp_smb_req+diff*0.1) end = get_filetime_format(timestamp_smb_rsp-diff*0.1) system_time = randint(begin, end) if smb_version is not "1" and hosting_version is not "1": smb_rsp_paket = SMB2_SYNC_Header(Flags = 1) smb_rsp_negotiate_body = SMB2_Negotiate_Protocol_Response\ (DialectRevision=0x02ff, SecurityBufferOffset=124, SecurityBufferLength=len(security_blob), SecurityBlob=security_blob, Capabilities=capabilities, MaxTransactSize=data_size, MaxReadSize=data_size, MaxWriteSize=data_size, SystemTime=system_time, ServerStartTime=server_start_time, ServerGuid=server_Guid) smb_rsp_length = len(smb_rsp_paket) + len(smb_rsp_negotiate_body) else: smb_rsp_paket = SMBNegociate_Protocol_Response_Advanced_Security\ (Start="\xffSMB", PID=smb_PID, MID=smb_MID, DialectIndex=5, SecurityBlob=security_blob) smb_rsp_length = len(smb_rsp_paket) smb_rsp_net_bio = NBTSession(TYPE=0x00, LENGTH=smb_rsp_length) smb_rsp_tcp = TCP(sport=smb_port, dport=sport, flags='PA', seq=victim_seq, ack=attacker_seq) smb_rsp_ip = IP(src=ip, dst=ip_source, ttl=destination_ttl_value) smb_rsp_ether = Ether(src=mac_destination, dst=mac_source) victim_seq += len(smb_rsp_net_bio) + len(smb_rsp_paket) if smb_version is not "1"and hosting_version is not "1": victim_seq += len(smb_rsp_negotiate_body) smb_rsp_combined = (smb_rsp_ether / smb_rsp_ip / smb_rsp_tcp / smb_rsp_net_bio / smb_rsp_paket) if smb_version is not "1"and hosting_version is not "1": smb_rsp_combined = (smb_rsp_combined / smb_rsp_negotiate_body) smb_rsp_combined.time = timestamp_smb_rsp packets.append(smb_rsp_combined) # source confirms SMB response package confirm_tcp = TCP(sport=sport, dport=smb_port, seq=attacker_seq, ack=victim_seq, window=source_win_value, flags='A') confirm_smb_res = (confirm_ether / confirm_ip / confirm_tcp) timestamp_confirm = update_timestamp(timestamp_smb_rsp, pps, minDelay) confirm_smb_res.time = timestamp_confirm packets.append(confirm_smb_res) # attacker sends FIN ACK confirm_tcp = TCP(sport=sport, dport=smb_port, seq=attacker_seq, ack=victim_seq, window=source_win_value, flags='FA') source_fin_ack = (confirm_ether / confirm_ip / confirm_tcp) timestamp_src_fin_ack = update_timestamp(timestamp_confirm, pps, minDelay) source_fin_ack.time = timestamp_src_fin_ack attacker_seq += 1 packets.append(source_fin_ack) # victim sends FIN ACK reply_tcp = TCP(sport=smb_port, dport=sport, seq=victim_seq, ack=attacker_seq, window=destination_win_value, flags='FA') destination_fin_ack = (reply_ether / reply_ip / reply_tcp) timestamp_dest_fin_ack = update_timestamp(timestamp_src_fin_ack, pps, minDelay) victim_seq += 1 destination_fin_ack.time = timestamp_dest_fin_ack packets.append(destination_fin_ack) # source sends final ACK confirm_tcp = TCP(sport=sport, dport=smb_port, seq=attacker_seq, ack=victim_seq, window=source_win_value, flags='A') final_ack = (confirm_ether / confirm_ip / confirm_tcp) timestamp_final_ack = update_timestamp(timestamp_dest_fin_ack, pps, minDelay) final_ack.time = timestamp_final_ack packets.append(final_ack) else: # Build RST package reply_ether = Ether(src=mac_destination, dst=mac_source) reply_ip = IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF') reply_tcp = TCP(sport=smb_port, dport=sport, seq=0, ack=attacker_seq, flags='RA', window=destination_win_value, options=[('MSS', destination_mss_value)]) reply = (reply_ether / reply_ip / reply_tcp) reply.time = timestamp_reply packets.append(reply) pps = max(get_interval_pps(complement_interval_pps, timestamp_next_pkt), 10) timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) # store end time of attack self.attack_end_utime = packets[-1].time # write attack packets to pcap pcap_path = self.write_attack_pcap(sorted(packets, key=lambda pkt: pkt.time)) # return packets sorted by packet time_sec_start return len(packets), pcap_path