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_rnd_os, get_ip_range,\
generate_source_port_from_platform, get_filetime_format
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 = get_rnd_os()
self.add_param_value(Param.HOSTING_VERSION, get_smb_version(platform=self.host_os))
self.add_param_value(Param.SOURCE_PLATFORM, 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