зеркало из https://github.com/mozilla/MozDef.git
44 строки
1.8 KiB
Python
44 строки
1.8 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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# This script alerts when openvpn's duo security failed to contact the duo server and let the user in.
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# This is a very serious warning that must be acted upon as it means MFA failed and only one factor was validated (in
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# this case a VPN certificate)
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from lib.alerttask import AlertTask
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from mozdef_util.query_models import SearchQuery, PhraseMatch
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class AlertDuoFailOpen(AlertTask):
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def main(self):
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search_query = SearchQuery(minutes=15)
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search_query.add_must(PhraseMatch('summary', 'Failsafe Duo login'))
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self.filtersManual(search_query)
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# Search aggregations on field 'sourceipaddress', keep X samples of
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# events at most
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self.searchEventsAggregated('hostname', samplesLimit=10)
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# alert when >= X matching events in an aggregation
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# in this case, always
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self.walkAggregations(threshold=1)
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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 = 'bypass'
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tags = ['openvpn', 'duosecurity']
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severity = 'WARNING'
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summary = 'DuoSecurity contact failed, fail open triggered on {0}'.format(aggreg['value'])
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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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