mirror of https://github.com/MISP/PyMISP
Merge pull request #461 from cudeso/master
Disable to_ids based on false positive sightings reportingpull/469/head
GitHub
commit
c23375c275
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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'''
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Koen Van Impe
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Disable the to_ids flag of an attribute when there are to many false positives
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Put this script in crontab to run every /15 or /60
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*/5 * * * * mispuser /usr/bin/python3 /home/mispuser/PyMISP/examples/falsepositive_disabletoids.py
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Do inline config in "main"
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'''
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from pymisp import ExpandedPyMISP, MISPEvent
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from keys import misp_url, misp_key, misp_verifycert
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from datetime import datetime
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from datetime import date
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import datetime as dt
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import smtplib
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import mimetypes
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from email.mime.multipart import MIMEMultipart
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from email import encoders
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from email.mime.base import MIMEBase
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from email.mime.text import MIMEText
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import argparse
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def init(url, key, verifycert):
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'''
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Template to get MISP module started
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'''
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return ExpandedPyMISP(url, key, verifycert, 'json')
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if __name__ == '__main__':
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minimal_fp = 0
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threshold_to_ids = .50
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minimal_date_sighting_date = '1970-01-01 00:00:00'
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smtp_from = 'INSERT_FROM'
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smtp_to = 'INSERT_TO'
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smtp_server = 'localhost'
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report_changes = ''
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ts_format = '%Y-%m-%d %H:%M:%S'
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parser = argparse.ArgumentParser(description="Disable the to_ids flag of attributes with a certain number of false positives above a threshold.")
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parser.add_argument('-m', '--mail', action='store_true', help='Mail the report')
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parser.add_argument('-o', '--mailoptions', action='store', help='mailoptions: \'smtp_from=INSERT_FROM;smtp_to=INSERT_TO;smtp_server=localhost\'')
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parser.add_argument('-b', '--minimal-fp', default=minimal_fp, type=int, help='Minimal number of false positive (default: %(default)s )')
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parser.add_argument('-t', '--threshold', default=threshold_to_ids, type=float, help='Threshold false positive/true positive rate (default: %(default)s )')
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parser.add_argument('-d', '--minimal-date-sighting', default=minimal_date_sighting_date, help='Minimal date for sighting (false positive / true positive) (default: %(default)s )')
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args = parser.parse_args()
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misp = init(misp_url, misp_key, misp_verifycert)
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minimal_fp = int(args.minimal_fp)
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threshold_to_ids = args.threshold
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minimal_date_sighting_date = args.minimal_date_sighting
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minimal_date_sighting = int(dt.datetime.strptime(minimal_date_sighting_date, '%Y-%m-%d %H:%M:%S').strftime("%s"))
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# Fetch all the attributes
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result = misp.search('attributes', to_ids=1, include_sightings=1)
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if 'Attribute' in result:
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for attribute in result['Attribute']:
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true_positive = 0
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false_positive = 0
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compute_threshold = 0
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attribute_id = attribute['id']
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attribute_value = attribute['value']
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attribute_uuid = attribute['uuid']
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event_id = attribute['event_id']
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# Only do something if there is a sighting
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if 'Sighting' in attribute:
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for sighting in attribute['Sighting']:
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if int(sighting['date_sighting']) > minimal_date_sighting:
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if int(sighting['type']) == 0:
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true_positive = true_positive + 1
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elif int(sighting['type']) == 1:
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false_positive = false_positive + 1
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if false_positive > minimal_fp:
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compute_threshold = false_positive / (true_positive + false_positive)
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if compute_threshold >= threshold_to_ids:
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# Fetch event title for report text
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event_details = misp.get_event(event_id)
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event_info = event_details['Event']['info']
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misp.update_attribute( { 'uuid': attribute_uuid, 'to_ids': 0})
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report_changes = report_changes + 'Disable to_ids for [%s] (%s) in event [%s] (%s) - FP: %s TP: %s \n' % (attribute_value, attribute_id, event_info, event_id, false_positive, true_positive)
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# Changing the attribute to_ids flag sets the event to unpublished
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misp.publish(event_id)
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# Only send/print the report if it contains content
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if report_changes:
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if args.mail:
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if args.mailoptions:
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mailoptions = args.mailoptions.split(';')
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for s in mailoptions:
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if s.split('=')[0] == 'smtp_from':
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smtp_from = s.split('=')[1]
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if s.split('=')[0] == 'smtp_to':
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smtp_to = s.split('=')[1]
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if s.split('=')[0] == 'smtp_server':
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smtp_server = s.split('=')[1]
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now = datetime.now()
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current_date = now.strftime(ts_format)
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report_changes_body = 'MISP Disable to_ids flags for %s on %s\n-------------------------------------------------------------------------------\n\n' % (misp_url, current_date)
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report_changes_body = report_changes_body + 'Minimal number of false positives before considering threshold: %s\n' % (minimal_fp)
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report_changes_body = report_changes_body + 'Threshold false positives/true positives to disable to_ids flag: %s\n' % (threshold_to_ids)
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report_changes_body = report_changes_body + 'Minimal date for sighting false positives: %s\n\n' % (minimal_date_sighting_date)
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report_changes_body = report_changes_body + report_changes
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report_changes_body = report_changes_body + '\nEvents that have attributes with changed to_ids flag have been republished, without e-mail notification.'
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report_changes_body = report_changes_body + '\n\nMISP Disable to_ids Finished\n'
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subject = 'Report of disable to_ids flag for false positives sightings of %s' % (current_date)
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msg = MIMEMultipart()
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msg['From'] = smtp_from
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msg['To'] = smtp_to
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msg['Subject'] = subject
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msg.attach(MIMEText(report_changes_body, 'text'))
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print(report_changes_body)
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server = smtplib.SMTP(smtp_server)
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server.sendmail(smtp_from, smtp_to, msg.as_string())
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else:
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print(report_changes)
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@ -0,0 +1,165 @@
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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'''
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Koen Van Impe
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List all the sightings
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Put this script in crontab to run every day
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25 4 * * * mispuser /usr/bin/python3 /home/mispuser/PyMISP/examples/show_sightings.py
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'''
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from pymisp import ExpandedPyMISP
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from keys import misp_url, misp_key, misp_verifycert
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import sys
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import time
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from datetime import datetime
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import smtplib
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import mimetypes
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from email.mime.multipart import MIMEMultipart
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from email import encoders
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from email.mime.base import MIMEBase
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from email.mime.text import MIMEText
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import argparse
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def init(url, key, verifycert):
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'''
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Template to get MISP module started
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'''
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return ExpandedPyMISP(url, key, verifycert, 'json')
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def set_drift_timestamp(drift_timestamp, drift_timestamp_path):
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'''
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Save the timestamp in a (local) file
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'''
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try:
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with open(drift_timestamp_path, 'w+') as f:
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f.write(str(drift_timestamp))
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return True
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except IOError:
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sys.exit("Unable to write drift_timestamp %s to %s" % (drift_timestamp, drift_timestamp_path))
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return False
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def get_drift_timestamp(drift_timestamp_path):
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'''
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From when do we start with the sightings?
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'''
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try:
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with open(drift_timestamp_path) as f:
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drift = f.read()
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if drift:
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drift = int(float(drift))
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else:
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drift = 0
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except IOError:
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drift = 0
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return drift
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def search_sightings(misp, from_timestamp, end_timestamp):
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'''
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Search all the sightings
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'''
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completed_sightings = []
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try:
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found_sightings = misp.search_sightings(date_from=from_timestamp, date_to=end_timestamp)
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except Exception as e:
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sys.exit('Unable to search for sightings')
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if found_sightings is not None:
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for s in found_sightings:
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if 'Sighting' in s:
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sighting = s['Sighting']
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if 'attribute_id' in sighting:
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attribute_id = sighting['attribute_id']
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# Query the attribute and event to get the details
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try:
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attribute = misp.get_attribute(attribute_id)
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except Exception as e:
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print("Unable to fetch attribute")
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continue
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if 'Attribute' in attribute and 'uuid' in attribute['Attribute']:
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event_details = misp.get_event(attribute['Attribute']['event_id'])
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event_info = event_details['Event']['info']
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attribute_uuid = attribute['Attribute']['uuid']
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completed_sightings.append({'attribute_uuid': attribute_uuid, 'date_sighting': sighting['date_sighting'], 'source': sighting['source'], 'type': sighting['type'], 'uuid': sighting['uuid'], 'event_id': attribute['Attribute']['event_id'], 'value': attribute['Attribute']['value'], 'attribute_id': attribute['Attribute']['id'], 'event_title': event_info})
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else:
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continue
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return completed_sightings
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if __name__ == '__main__':
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smtp_from = 'INSERT_FROM'
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smtp_to = 'INSERT_TO'
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smtp_server = 'localhost'
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report_sightings = ''
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ts_format = '%Y-%m-%d %H:%M:%S'
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drift_timestamp_path = '/home/mispuser/PyMISP/examples/show_sightings.drift'
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parser = argparse.ArgumentParser(description="Show all the sightings.")
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parser.add_argument('-m', '--mail', action='store_true', help='Mail the report')
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parser.add_argument('-o', '--mailoptions', action='store', help='mailoptions: \'smtp_from=INSERT_FROM;smtp_to=INSERT_TO;smtp_server=localhost\'')
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args = parser.parse_args()
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misp = init(misp_url, misp_key, misp_verifycert)
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start_timestamp = get_drift_timestamp(drift_timestamp_path=drift_timestamp_path)
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end_timestamp = time.time()
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start_timestamp_s = datetime.fromtimestamp(start_timestamp).strftime(ts_format)
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end_timestamp_s = datetime.fromtimestamp(end_timestamp).strftime(ts_format)
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# Get all attribute sightings
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found_sightings = search_sightings(misp, start_timestamp, end_timestamp)
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if found_sightings:
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for s in found_sightings:
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if int(s['type']) == 0:
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s_type = 'TP'
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else:
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s_type = 'FP'
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date_sighting = datetime.fromtimestamp(int(s['date_sighting'])).strftime(ts_format)
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source = s['source']
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if not s['source']:
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source = 'N/A'
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report_sightings = report_sightings + '%s for [%s] (%s) in event [%s] (%s) on %s from %s\n' % (s_type, s['value'], s['attribute_id'], s['event_title'], s['event_id'], date_sighting, source)
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set_drift_timestamp(end_timestamp, drift_timestamp_path)
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else:
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report_sightings = 'No sightings found'
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# Mail options
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if args.mail:
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if args.mailoptions:
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mailoptions = args.mailoptions.split(';')
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for s in mailoptions:
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if s.split('=')[0] == 'smtp_from':
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smtp_from = s.split('=')[1]
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if s.split('=')[0] == 'smtp_to':
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smtp_to = s.split('=')[1]
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if s.split('=')[0] == 'smtp_server':
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smtp_server = s.split('=')[1]
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report_sightings_body = 'MISP Sightings report for %s between %s and %s\n-------------------------------------------------------------------------------\n\n' % (misp_url, start_timestamp_s, end_timestamp_s)
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report_sightings_body = report_sightings_body + report_sightings
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subject = 'Report of sightings between %s and %s' % (start_timestamp_s, end_timestamp_s)
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msg = MIMEMultipart()
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msg['From'] = smtp_from
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msg['To'] = smtp_to
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msg['Subject'] = subject
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msg.attach(MIMEText(report_sightings_body, 'text'))
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server = smtplib.SMTP(smtp_server)
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server.sendmail(smtp_from, smtp_to, msg.as_string())
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else:
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print(report_sightings)
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