-
Notifications
You must be signed in to change notification settings - Fork 0
/
detector.py
163 lines (140 loc) · 7.2 KB
/
detector.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
from subprocess import Popen, PIPE
import socket, struct
import time
import argparse
import re
import os
import logging
logging.basicConfig(filename='/mnt/detector.log',level=logging.DEBUG)
## the data dictionary keeps track of every user
# sample: { 167837965 : (list of starttimes for five windows, list of corresponding counts, list of already seen ports) }
# The key is long format of IP address, to make lookups efficient.
intDet = 1000
intDet_PSH = 1000
attackThresh = 4
stopThresh = 2
alpha = 0.9
serverip = ""
curSeqs = 0
curSeqs_PSH = 0
avgSeqs = 0
avgSeqs_PSH = 0
lastDet = 0
lastDet_PSH = 0
stop_tb_flag = 0
def triggerFrade():
if args.fradeArgs is not None:
print("Starting FRADE ",args.fradeArgs[0])
os.system("bash start_take_a_break.sh " + " &")
os.system("bash start_frade.sh " + args.fradeArgs[0] + " &")
if args.dyn4Args is not None:
print("Starting dyn4 ",args.dyn4Args[0])
os.system("bash start_dyn4.sh " + args.dyn4Args[0] + " &")
#os.system("bash stop_take_a_break.sh " + " &")
def detect(time1):
global isAttack
global lastDet
global intDet
global avgSeqs
global curSeqs
global stop_tb_flag
curSeqs += 1
logging.info("On no updation" + str(time1) + "curSeqs " + str(curSeqs) + " avgSeqs " + str(avgSeqs))
if (lastDet == 0):
lastDet = time1
else:
if (time1 - lastDet > intDet):
lastDet = time1
logging.info( str(time1) + "curSeqs " + str(curSeqs) + " avgSeqs " + str(avgSeqs))
logging.info(" isAttack " + str(isAttack))
if (curSeqs > attackThresh*avgSeqs and avgSeqs > 0):
if not isAttack:
logging.info("Attack detected 1 :" + str(time1))
triggerFrade()
stop_tb_flag = 0
isAttack = True
else:
if isAttack and (curSeqs < stopThresh*avgSeqs and curSeqs > 0):
logging.info("Attack has stopped 1", time1)
if(stop_tb_flag == 0):
os.system("bash stop_frade.sh &")
os.system("bash stop_take_a_break.sh " + " &")
stop_tb_flag = 1
isAttack = False
if not isAttack:
if (avgSeqs == 0):
avgSeqs = curSeqs
else:
avgSeqs = alpha*avgSeqs + (1-alpha)*curSeqs
logging.info("Updated avgSeqs to " + str(avgSeqs) + " alpha " + str(alpha) + " curseqs " + str(curSeqs))
curSeqs = 0
def detect_stop(time1):
global isAttack
global lastDet_PSH
global intDet_PSH
global avgSeqs_PSH
global curSeqs_PSH
global stop_tb_flag
curSeqs_PSH += 1
logging.info("On no updation" + str(time1) + "curSeqs_PSH" + str(curSeqs_PSH) + " avgSeqs_PSH " + str(avgSeqs_PSH))
if (lastDet_PSH == 0):
lastDet_PSH = time1
else:
if (time1 - lastDet_PSH > intDet_PSH):
lastDet_PSH = time1
logging.info(str(time1) + "curSeqs_PSH " + str(curSeqs_PSH) + " avgSeqs_PSH " + str(avgSeqs_PSH))
logging.info(" isAttack PSH " + str(isAttack) + str(attackThresh*avgSeqs_PSH))
if (curSeqs_PSH > attackThresh*avgSeqs_PSH and avgSeqs_PSH > 0 ):
if not isAttack:
logging.info("Attack detected 2 ",time1)
triggerFrade()
stop_tb_flag = 0
isAttack = True
else:
logging.info("Checking for Blk over at PSH avgPSH * stopThresh" + str(attackThresh*avgSeqs_PSH))
if isAttack and (curSeqs_PSH < stopThresh*avgSeqs_PSH and curSeqs_PSH > 0):
logging.info("Blacklisting over 2"+ str(time1))
if(stop_tb_flag == 0):
os.system("bash stop_frade.sh &")
os.system("bash stop_take_a_break.sh " + " &")
stop_tb_flag = 1
#isAttack = False
if not isAttack:
if (avgSeqs_PSH == 0):
avgSeqs_PSH = curSeqs_PSH
else:
avgSeqs_PSH = alpha*avgSeqs_PSH + (1-alpha)*curSeqs_PSH
logging.info("Updated avgSeqs_PSH to " + str(avgSeqs_PSH) + " alpha " + str(alpha) + " curseqs_PSH " + str(curSeqs_PSH))
curSeqs_PSH = 0
parser = argparse.ArgumentParser(description='Detector module for FRADE. Detect an attack when number of new connection requests spikes.')
parser.add_argument('--ip', '-i', action='store', dest='serverip', required=True, help='Server to monitor.')
parser.add_argument('--nic', '-n', action='store', dest='servereth', required=True, help='Network interface to monitor (e.g., eth4).')
parser.add_argument('--frade', '-f', nargs='+', action='store', dest='fradeArgs', required=False, help='Arguments needed to start FRADE.')
parser.add_argument('--dyn4', '-d', nargs='+', action='store', dest='dyn4Args', required=False, help='Arguments needed to start dyn4.')
args = parser.parse_args()
isAttack=False
if __name__ == "__main__":
# Arguments (again, being bad with globals)
serverip=args.serverip
p = Popen(["tcpdump", "-i",args.servereth,"-n", "-tt" ,"port", "80", "-s", "68"], stdout=PIPE, bufsize=1, universal_newlines=True)
#p = Popen(["tcpdump", "-r","/zfs/FRADE/log.flood.wikipedia.100.1.dyn4","-nn", "-tt" ,"port", "80", "-s", "68"], stdout=PIPE, bufsize=1, universal_newlines=True)
with p.stdout:
for line in iter(p.stdout.readline, b''):
#Format: "1486008562.808828 IP 10.1.1.13.47661 > 10.1.1.3.80: Flags [S], seq 3937307324, win 29200, options [mss 1460,sackOK,TS[|tcp]>"
sl = line.split(" ")
#print sl
try:
timeinmilli,sipport,dipport = float(sl[0])*1000 , sl[2], sl[4]
dip = ".".join(dipport.split(".")[0:-1])
sport = int(sipport.split(".")[-1])
sip = ".".join(sipport.split(".")[0:-1])
flags = sl[6]
seq = sl[8]
except:
continue
if dip == serverip:
if (flags == "[S],"):
detect(timeinmilli)
if (flags == "[P]," or flags == "[P.],"):
detect_stop(timeinmilli)
p.wait() # wait for the subprocess to exit