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dshield.py
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dshield.py
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#!/usr/bin/env python
import json
import requests
import pygeoip
import ConfigParser
from IPy import IP
from utilities import *
class DShield():
# DShield API URLs
URL_THREAT_LEVEL = 'https://isc.sans.edu/api/infocon?json'
URL_TOP_PORTS = 'https://isc.sans.edu/api/topports/records/%d?json'
URL_SOURCES = 'https://isc.sans.edu/api/sources/%s/%d?json'
URL_IP_DETAILS = 'https://isc.sans.edu/api/ip/%s?json'
# Current DShield threat level
threat_level = None
# List of top attacked ports
top_ports = None
# List of sources
sources = None
# List of attacking countries
attacking_countries = None
# List of attacking sources
attacking_sources = None
# If any of the tasks fails this will switch to True
failure = False
# Instance of pygeoip
geo = None
def __init__(self, config, debug):
if debug:
log('Setting up envirnment in dshield.DShield', 'debug')
self.debug = debug
if self.debug:
log('Loading configuration for geo location', 'debug')
try:
geofile = config.get('geolocation', 'filepath')
except KeyboardInterrupt:
log('User terminated session')
exit(0)
except ConfigParser.NoOptionError, e:
log('Configuration: %s'%(e), 'fatal')
error('%s'%(e), 'fatal')
except Exception, e:
log('Unexpected error occured when trying to read geolocation filepath configurations.', 'error')
log('%s'%(e), 'fatal')
error('%s'%(e), 'fatal')
if self.debug:
log("Initializing pygeoip.GeoIP with '%s'"%(geofile), 'debug')
try:
self.geo = pygeoip.GeoIP(geofile)
except KeyboardInterrupt:
log('User terminated session')
exit(0)
except IOError, e:
message = str(e).replace('[Errno 2] ', '')
log('%s'%(message), 'fatal')
error('%s'%(message), 'fatal')
except Exception, e:
log('Unexpected error occured when trying to initialize pygeoip.GeoIP with %s'%(geofile), 'error')
log('%s'%(e), 'fatal')
error('%s'%(e), 'fatal')
def getThreatLevel(self):
if self.debug:
log('Trying to read current DShield threat level', 'debug')
try:
if self.debug:
log('Requesting URL %s'%(self.URL_THREAT_LEVEL), 'debug')
response = requests.get(self.URL_THREAT_LEVEL)
self.threat_level = json.loads(response.text)['status']
log('Successfully read threat level')
return self.threat_level
except KeyboardInterrupt:
log('User terminated session')
exit(0)
except Exception, e:
log('Failed reading threat level')
log("%s in 'DShield.getThreatLevel()'"%(e), 'error')
self.failure = True
def getTopPorts(self, limit=10):
if self.debug:
log('Trying to read top %d attacked ports'%(limit), 'debug')
try:
if self.debug:
log('Requesting URL %s'%(self.URL_TOP_PORTS%(limit)), 'debug')
response = requests.get(self.URL_TOP_PORTS%(limit))
data = json.loads(response.text)
self.top_ports = []
for x in range(0, limit):
x = str(x)
port = data[x]['targetport']
attacks = data[x]['records']
self.top_ports.append((port, attacks))
log('Successfully read top attacked ports')
return self.top_ports
except KeyboardInterrupt:
log("User terminated session")
exit(0)
except Exception, e:
log('Failed reading top attacked ports')
log("%s in 'DShield.getTopPorts()'"%(e), 'error')
self.failure = True
def getSources(self, column='attacks', limit=100):
if self.debug:
log('Trying to read attacking sources', 'debug')
try:
if self.debug:
log('Requesting URL %s'%(self.URL_SOURCES%(column, limit)), 'debug')
response = requests.get(self.URL_SOURCES%(column, limit), headers={'User-Agent': 'Python Threat Monitor'})
obj = json.loads(response.text)
self.sources = []
for id in range(0, len(obj)):
try:
ip = self.sanitizeIp(obj[id]['ip'])
if not IP(ip).iptype() is 'PUBLIC':
log("Detected '%s' as a possible local IP. Manual inspection might be required"%(ip), 'warning')
country = self.geo.record_by_name(ip)['country_name']
attacks = int(obj[id]['attacks'])
count = int(obj[id]['count'])
firstseen = obj[id]['firstseen']
lastseen = obj[id]['lastseen']
self.sources.append((ip,country,attacks,count,firstseen,lastseen))
except KeyboardInterrupt:
log("User terminated session")
exit(0)
except TypeError, e:
country = ''
except Exception, e:
log('Failed reading an attacking source')
log("%s in 'DShield.getSources' (#3)"%(e), 'error')
self.failure = True
exit(0)
log('Successfully read attacking sources')
return self.sources
except KeyboardInterrupt:
log('User terminated session')
exit(0)
except Exception, e:
log('Failed reading sources')
log("%s in 'DShield.getSources()' (#4)"%(e), 'error')
self.failure = True
def getAttackingCountries(self, limit=10):
if self.debug:
log('Trying to read attacking countries', 'debug')
try:
if self.sources is None:
self.getSources()
data = {}
for ip, country, attacks, count, firstseen, lastseen in self.sources:
try:
data[country] += attacks
except:
data[country] = attacks
self.attacking_countries = sorted(data.items(), key=lambda x:x[1], reverse=True)
return self.attacking_countries
except KeyboardInterrupt:
log('User terminated session')
exit(0)
except Exception, e:
log('Failed reading attacking countries')
log("%s in 'DHsield.getAttackingCountries"%(e), 'error')
self.failure = True
def getAttackingSources(self, limit=10):
if self.debug:
log('Trying to read additional information about attacking sources')
try:
if self.sources is None:
self.getSources()
data = []
for x in range(0, limit):
source = self.sources[x]
ip = source[0]
asname = self.getExtendedSourceInfo(ip, 'asname')
if asname is None:
asname = 'N/A'
else:
asname = asname if len(asname) < 35 else asname[:32] + '...'
country = source[1] if len(source[1]) < 19 else source[1][:15] + '...'
attacks = int(source[2])
firstseen = source[4]
lastseen = source[5]
data.append((ip, asname.strip(), country, attacks, firstseen, lastseen))
log('Successfully read attacking sources')
self.attacking_sources = sorted(data, key=lambda x:x[3], reverse=True)
return self.attacking_sources
except KeyboardInterrupt:
log('User terminated session')
exit(0)
except Exception, e:
log('Failed getting attacking sources')
log("%s in 'DShield.getAttackingSources'"%(e), 'error')
self.failure = True
def sanitizeIp(self, ip):
try:
parts = ip.split('.')
sanitized = []
for part in parts:
sanitized.append(str(int(part)))
sanitized = '.'.join(sanitized)
return sanitized
except KeyboardInterrupt:
log('User terminated session')
exit(0)
except Exception, e:
log("Unexpected exception occured when trying to sanitize IP '%s'"%(ip), 'warning')
return ip
def getExtendedSourceInfo(self, source, field = None):
try:
log("Fetching extended information about '%s'"%(source), 'log')
if self.debug:
log('Requesting URL %s'%(self.URL_IP_DETAILS%(source)), 'debug')
response = requests.get(self.URL_IP_DETAILS%(source))
obj = json.loads(response.text)
if not field is None:
log("Successfully read '%s' for '%s'"%(field, source))
else:
log("Successfully read extended source info for '%s'"%(source))
return obj['ip'][field] if not field is None else obj
except KeyboardInterrupt:
log('User terminated session')
exit(0)
except Exception, e:
log('Failed getting extended source info')
log("%s in 'DShield.getExtendedSourceInfo'"%(e), 'error')
self.failure = True