snortStats.py

#!/usr/bin/env python

# Copyright (c) 2015, Matt Johansen
# All rights reserved.
 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
 
# 1. Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

"""Python module to scrape snort alert log and spit out some useful stats"""

import sys
import fileinput
import re
import time
import datetime
import optparse
from collections import Counter

__version__ = '1.0.1'
__author__ = 'Matt Johansen <@mattjay>'
__license__ = 'BSD'

desc = "Python module to scrape snort alert log and spit out some useful stats"
parser = optparse.OptionParser(description=desc)
parser.add_option('-t', help='number of hours back you want to look', dest='hours', default=24, type=int, action='store')
parser.add_option('-i', '--ips', help='shows list of unique IPs', dest='bool', default=False, action='store_true')
parser.add_option('-n', help='List the n most common IPs to visit in the given time period', dest='ips', default=0, type=int, action='store')
parser.add_option('-f', '--files', help='list of web log file paths', dest='files', type='string', action='store')
(opts, args) = parser.parse_args()

filenames = [x.strip() for x in opts.files.split(',')]

hoursAgo = datetime.datetime.today() - datetime.timedelta(hours = opts.hours)
snortHoursAgo = hoursAgo.strftime('%Y/%m/%d-%H:%M:%S.%f')
t2 = time.strptime(snortHoursAgo.split()[0], '%Y/%m/%d-%H:%M:%S.%f')
d2 = datetime.datetime(*t2[:6])

alerts = []
ips = Counter()

for f in filenames:
	with open(f) as fi:
		for line in fi:
			s = line.split()
			if s != None:
				d1 = datetime.datetime.strptime(str(datetime.datetime.now().year) + '/' + s[0], '%Y/%m/%d-%H:%M:%S.%f')
				if d1 > d2:
					alerts.append(d1)
					ips[s[-3]] += 1

try:
	from pyfiglet import Figlet
	fig = Figlet()
	print(fig.renderText("Snort Stats"))
except ImportError:
	print "Install pyfiglet for a (useless) pretty cool header!"

print "Total Unique IP Addresses Since", d2, " :   ", len(ips)
print "Total Alerts Since", d2, "            :   ", len(alerts)
if opts.bool == True:
	print "Unique IPs Since", d2, "                :   ", ips.keys()
if opts.ips > 0:
	print "Top", opts.ips, "Alert Causing IP(s) :", ips.most_common(opts.ips)
	try:
		from ascii_graph import Pyasciigraph
		graph = Pyasciigraph()
		for line in graph.graph("Most Common Alert Causing Ips", ips.most_common(opts.ips)):
			print line
	except ImportError:
		print "Install ascii_graph for a cool graph!"