/usr/share/pyshared/PreludeCorrelator/plugins/scan.py is in prelude-correlator 1.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 | # Copyright (C) 2006 G Ramon Gomez <gene at gomezbrothers dot com>
# Copyright (C) 2009 PreludeIDS Technologies <info@prelude-ids.com>
#
# This file is part of the Prelude-Correlator program.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING. If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
# Detect Eventscan:
# Playing multiple events from a single host against another single host
from PreludeCorrelator.context import Context
from PreludeCorrelator.pluginmanager import Plugin
class EventScanPlugin(Plugin):
def run(self, idmef):
source = idmef.Get("alert.source(*).node.address(*).address")
target = idmef.Get("alert.target(*).node.address(*).address")
if not source or not target:
return
for saddr in source:
for daddr in target:
ctx = Context(("SCAN EVENTSCAN", saddr, daddr), { "expire": 60, "threshold": 30, "alert_on_expire": True }, update = True, idmef=idmef)
if ctx.getUpdateCount() == 0:
ctx.Set("alert.correlation_alert.name", "A single host has played many events against a single target. This may be a vulnerability scan")
ctx.Set("alert.classification.text", "Eventscan")
ctx.Set("alert.assessment.impact.severity", "high")
# Detect Eventsweep:
# Playing the same event from a single host against multiple hosts
class EventSweepPlugin(Plugin):
def run(self, idmef):
classification = idmef.Get("alert.classification.text")
source = idmef.Get("alert.source(*).node.address(*).address")
target = idmef.Get("alert.target(*).node.address(*).address")
if not source or not target or not classification:
return
for saddr in source:
ctx = Context(("SCAN EVENTSWEEP", classification, saddr), { "expire": 60, "threshold": 30, "alert_on_expire": True }, overwrite = False)
if ctx.getUpdateCount() == 0:
ctx.Set("alert.correlation_alert.name", "A single host has played the same event against multiple targets. This may be a network scan for a specific vulnerability")
ctx.Set("alert.classification.text", "Eventsweep")
ctx.Set("alert.assessment.impact.severity", "high")
cur = ctx.Get("alert.target(*).node.address(*).address")
if cur:
for address in target:
if address in cur:
insert = False
return
ctx.update(idmef=idmef)
# Detect Eventstorm:
# Playing excessive events by a single host
class EventStormPlugin(Plugin):
def run(self, idmef):
source = idmef.Get("alert.source(*).node.address(*).address")
if not source:
return
for saddr in source:
ctx = Context(("SCAN EVENTSTORM", saddr), { "expire": 120, "threshold": 150, "alert_on_expire": True }, update = True, idmef = idmef)
if ctx.getUpdateCount() == 0:
ctx.Set("alert.correlation_alert.name", "A single host is producing an unusual amount of events")
ctx.Set("alert.classification.text", "Eventstorm")
ctx.Set("alert.assessment.impact.severity", "high")
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