new_contents: #!/usr/bin/env python
  
  # This Source Code Form is subject to the terms of the Mozilla Public
  # License, v. 2.0. If a copy of the MPL was not distributed with this
  # file, You can obtain one at http://mozilla.org/MPL/2.0/.
  # Copyright (c) 2017 Mozilla Corporation
  
  from lib.alerttask import AlertTask
  from query_models import SearchQuery, TermMatch, PhraseMatch
  
  
  class AlertSSHPasswordAuthViolation(AlertTask):
      def main(self):
          search_query = SearchQuery(hours=4)
  
          search_query.add_must([
              TermMatch('_type', 'event'),
              PhraseMatch('tags', 'ssh_password_auth_policy_violation'),
          ])
  
          self.filtersManual(search_query)
  
          # Search aggregations on field 'sourceipaddress', keep X samples of
          # events at most
          self.searchEventsAggregated('details.destinationipaddress', samplesLimit=100)
          # alert when >= X matching events in an aggregation
          self.walkAggregations(threshold=1)
  
      # Set alert properties
      def onAggregation(self, aggreg):
          # aggreg['count']: number of items in the aggregation, ex: number of failed login attempts
          # aggreg['value']: value of the aggregation field, ex: toto@example.com
          # aggreg['events']: list of events in the aggregation
          category = 'ssh_password_auth_policy_violation'
          tags = ['ssh_password_auth_policy_violation']
          severity = 'WARNING'
  
          summary = ('SSH password authentication allowed on {0} ('.format(aggreg['value']))
          for event in aggreg['events'][:5]:
              summary += str(event['_source']['details']['destinationport']) + ' '
          summary += ')'
  
          # Create the alert object based on these properties
          return self.createAlertDict(summary, category, tags, aggreg['events'], severity)
  
subject: Add ssh password auth violation alert