old_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) 2014 Mozilla Corporation
  #
  # Contributors:
  # Anthony Verez averez@mozilla.com
  # Jeff Bryner jbryner@mozilla.com
  
  from lib.alerttask import AlertTask
  import pyes
  
  class AlertBruteforceSsh(AlertTask):
      def main(self):
          # look for events in last X mins
          date_timedelta = dict(minutes=2)
          # Configure filters using pyes
          must = [
              pyes.TermFilter('_type', 'event'),
              pyes.QueryFilter(pyes.MatchQuery('summary','failed','phrase')),
              pyes.TermFilter('program','sshd'),
              pyes.QueryFilter(pyes.MatchQuery('summary', 'login invalid ldap_count_entries', 'boolean'))
          ]
          must_not = [
              pyes.QueryFilter(pyes.MatchQuery('summary','10.22.8.128','phrase')),
              pyes.QueryFilter(pyes.MatchQuery('summary','10.8.75.35','phrase')),
              pyes.QueryFilter(pyes.MatchQuery('summary','208.118.237.','phrase'))
          ]
          self.filtersManual(date_timedelta, must=must, must_not=must_not)
  
          # Search aggregations on field 'sourceipaddress', keep X samples of events at most
          self.searchEventsAggreg('sourceipaddress', samplesLimit=10)
          # alert when >= X matching events in an aggregation
          self.walkAggregations(threshold=10)
  
      # Set alert properties
      def onAggreg(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 = 'bruteforce'
          tags = ['ssh']
          severity = 'NOTICE'
  
          summary = ('{0} ssh bruteforce attempts by {1}'.format(aggreg['count'], aggreg['value']))
          hosts = self.mostCommon(aggreg['allevents'],'_source.details.hostname')
          for i in hosts[:5]:
              summary += ' {0} ({1} hits)'.format(i[0], i[1])        
  
          # Create the alert object based on these properties
          return self.createAlertDict(summary, category, tags, aggreg['events'], severity)
  
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) 2014 Mozilla Corporation
  #
  # Contributors:
  # Anthony Verez averez@mozilla.com
  # Jeff Bryner jbryner@mozilla.com
  
  from lib.alerttask import AlertTask
  import pyes
  
  class AlertBruteforceSsh(AlertTask):
      def main(self):
          # look for events in last X mins
          date_timedelta = dict(minutes=2)
          # Configure filters using pyes
          must = [
              pyes.TermFilter('_type', 'event'),
              pyes.QueryFilter(pyes.MatchQuery('summary','failed','phrase')),
              pyes.TermFilter('program','sshd'),
              pyes.QueryFilter(pyes.MatchQuery('summary', 'login invalid ldap_count_entries', 'boolean'))
          ]
          must_not = [
              pyes.QueryFilter(pyes.MatchQuery('summary','10.22.75.203','phrase')),
              pyes.QueryFilter(pyes.MatchQuery('summary','10.8.75.144','phrase'))
          ]
          self.filtersManual(date_timedelta, must=must, must_not=must_not)
  
          # Search aggregations on field 'sourceipaddress', keep X samples of events at most
          self.searchEventsAggreg('sourceipaddress', samplesLimit=10)
          # alert when >= X matching events in an aggregation
          self.walkAggregations(threshold=10)
  
      # Set alert properties
      def onAggreg(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 = 'bruteforce'
          tags = ['ssh']
          severity = 'NOTICE'
  
          summary = ('{0} ssh bruteforce attempts by {1}'.format(aggreg['count'], aggreg['value']))
          hosts = self.mostCommon(aggreg['allevents'],'_source.details.hostname')
          for i in hosts[:5]:
              summary += ' {0} ({1} hits)'.format(i[0], i[1])        
  
          # Create the alert object based on these properties
          return self.createAlertDict(summary, category, tags, aggreg['events'], severity)
  
subject: set example whitelists