/etc/prelude-lml/ruleset/arpwatch.rules is in prelude-lml-rules 4.1.0-1.
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 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | #FULLNAME: arpwatch
#VERSION: 1.0
#DESCRIPTION: arpwatch is a computer software tool for monitoring Address Resolution Protocol traffic on a computer network. The rules included here were developed using arpwatch-2.1a11-7.9.3.
#####
#
# Copyright (C) 2005 G Ramon Gomez <gene at gomezbrothers dot com>
# All Rights Reserved
#
# This file is part of the Prelude-LML 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; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#####
#DESCRIPTION:New ARP address detection
#CATEGORY:Monitoring
#LOG:Oct 14 00:47:50 hal arpwatch: new activity 12.34.56.78 0:20:a9:a:c:2a
regex=new (station|activity) ([\d\.]+) ([\da-f:]+); \
classification.text=New ARP address detected; \
id=4200; \
revision=1; \
analyzer(0).name=arpwatch; \
analyzer(0).manufacturer=http://ee.lbl.gov; \
analyzer(0).class=NIDS; \
assessment.impact.severity=low; \
assessment.impact.completion=succeeded; \
assessment.impact.type=other; \
assessment.impact.description=This ethernet/ip address pair ($3/$2) is either new or has not been used recently.; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$2; \
source(0).node.address(1).category=mac; \
source(0).node.address(1).address=$3; \
last
#DESCRIPTION:Ethernet address change detection
#CATEGORY:Monitoring
#LOG:Apr 21 23:05:00 192.168.1.35 arpwatch: flip flop 192.168.1.33 0:90:6d:f2:24:0 (8:0:20:c8:fe:15)
regex=(flip flop|changed ethernet address|reused old ethernet address) ([\d\.]+) ([\da-f:]+) \(([\da-f:]+)\); \
classification.text=Ethernet address change detected; \
id=4201; \
revision=1; \
analyzer(0).name=arpwatch; \
analyzer(0).manufacturer=http://ee.lbl.gov; \
analyzer(0).class=NIDS; \
assessment.impact.severity=medium; \
assessment.impact.completion=succeeded; \
assessment.impact.type=other; \
assessment.impact.description=The ethernet address of $2 has changed from $3 to $4.; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$2; \
source(0).node.address(1).category=mac; \
source(0).node.address(1).address=$3; \
source(0).node.address(2).category=mac; \
source(0).node.address(2).address=$4; \
last
#DESCRIPTION:(ethernet|ip) broadcast address detection
#CATEGORY:Monitoring
#LOG:Apr 21 16:53:59 soledad arpwatch: ethernet broadcast 100.100.100.150 0:0:0:0:0:0
regex=(ethernet|ip) broadcast ([\d\.]+) ([\da-f:]+); \
classification.text=$1 broadcast address detected; \
id=4202; \
revision=1; \
analyzer(0).name=arpwatch; \
analyzer(0).manufacturer=http://ee.lbl.gov; \
analyzer(0).class=NIDS; \
assessment.impact.severity=medium; \
assessment.impact.completion=succeeded; \
assessment.impact.type=other; \
assessment.impact.description=The $1 address of this host is a broadcast address.; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$2; \
source(0).node.address(1).category=mac; \
source(0).node.address(1).address=$3; \
last
#DESCRIPTION:Bogus IP address detection
#CATEGORY:Network Security
#LOG:Nov 18 15:57:50 fw arpwatch: bogon 169.254.189.71 0:c:f1:16:87:d9
regex=bogon ([\d\.]+) ([\da-f:]+); \
classification.text=Bogus IP address detected; \
id=4203; \
revision=1; \
analyzer(0).name=arpwatch; \
analyzer(0).manufacturer=http://ee.lbl.gov; \
analyzer(0).class=NIDS; \
assessment.impact.severity=medium; \
assessment.impact.completion=succeeded; \
assessment.impact.type=other; \
assessment.impact.description=$1 is not local to the local subnet.; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$1; \
source(0).node.address(1).category=mac; \
source(0).node.address(1).address=$2; \
last
#DESCRIPTION:MAC address mismatch detection
#CATEGORY:Network Security
#LOG:Feb 24 19:18:36 hal arpwatch: ethernet mismatch 195.215.178.10 0:4:c1:a7:f6:38 (0:50:4:40:c9:8f)
regex=ethernet mismatch ([\d\.]+) ([\da-f:]+) \(([\da-f:]+)\); \
classification.text=MAC address mismatch detected; \
id=4204; \
revision=1; \
analyzer(0).name=arpwatch; \
analyzer(0).manufacturer=http://ee.lbl.gov; \
analyzer(0).class=NIDS; \
assessment.impact.severity=high; \
assessment.impact.completion=succeeded; \
assessment.impact.type=other; \
assessment.impact.description=The source mac ethernet address ($2) didn't match the address inside the arp packet ($3).; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$1; \
source(0).node.address(1).category=mac; \
source(0).node.address(1).address=$2; \
source(0).node.address(2).category=mac; \
source(0).node.address(2).address=$3; \
last
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