mirror of https://github.com/MISP/PyMISP
Disable to_ids based on false positive sightings reporting
Koen Van Impe
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1e0016cafa
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c8e9aa47d5
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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 and len(attribute['Sighting']) > 0:
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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 len(report_changes) > 0:
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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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