зеркало из https://github.com/mozilla/MozDef.git
49 строки
1.9 KiB
Python
49 строки
1.9 KiB
Python
#!/usr/bin/env python
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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# Copyright (c) 2014 Mozilla Corporation
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#
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# Contributors:
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# Anthony Verez averez@mozilla.com
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from lib.alerttask import AlertTask
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import pyes
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class AlertBroIntel(AlertTask):
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def main(self):
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# look for events in last 30 mins
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date_timedelta = dict(minutes=30)
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# Configure filters using pyes
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must = [
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pyes.TermFilter('_type', 'event'),
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pyes.TermFilter('category', 'brointel'),
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pyes.ExistsFilter('seenindicator')
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]
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self.filtersManual(date_timedelta, must=must)
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# Search aggregations on field 'seenindicator', keep 50 samples of events at most
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self.searchEventsAggregated('details.seenindicator', samplesLimit=50)
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# alert when >= 5 matching events in an aggregation
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self.walkAggregations(threshold=5)
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# Set alert properties
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def onAggregation(self, aggreg):
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# aggreg['count']: number of items in the aggregation, ex: number of failed login attempts
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# aggreg['value']: value of the aggregation field, ex: toto@example.com
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# aggreg['events']: list of events in the aggregation
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category = 'bro'
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tags = ['bro']
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severity = 'NOTICE'
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summary = ('{0} {1}: {2}'.format(aggreg['count'], 'bro intel match', aggreg['value']))
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# append first 3 source IPs
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summary += ' sample sourceips: '
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for e in aggreg['events'][:3]:
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if 'sourceipaddress' in e['_source']['details'].keys():
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summary += '{0} '.format(e['_source']['details']['sourceipaddress'])
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# Create the alert object based on these properties
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return self.createAlertDict(summary, category, tags, aggreg['events'], severity)
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