File: linux-kernel.rules

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# linux-kernel.rules
# Copyright (c) 2009-2017, Quadrant Information Security <www.quadrantsec.com>
# All rights reserved.
#
# Please submit any custom rules or ideas to sagan-submit@quadrantsec.com or the sagan-sigs mailing list
#
#*************************************************************
#  Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
#  following conditions are met:
#
#  * Redistributions of source code must retain the above copyright notice, this list of conditions and the following
#    disclaimer.
#  * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
#    following disclaimer in the documentation and/or other materials provided with the distribution.
#  * Neither the name of the nor the names of its contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES,
#  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
#  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
#  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
#  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#*************************************************************
# 

# These detect "generic" netfilter/iptables messages.  Normalization will _not_ work if your using a user-defined iptables LOG "prefix" options!

#alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[LINUX-KERNEL] IPTABLES TCP"; content: "IN="; content: "OUT="; content: "PROTO=TCP"; default_proto: tcp; classtype: bad-unknown; reference: url,wiki.quadrantsec.com/bin/view/Main/5001104; normalize; program: kernel; sid: 5001104; rev:3;)
#alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[LINUX-KERNEL] IPTABLES TCP"; content: "IN="; content: "OUT="; content: "PROTO=UDP"; default_proto: tcp; classtype: bad-unknown; reference: url,wiki.quadrantsec.com/bin/view/Main/5001105; normalize; program: kernel; sid: 5001105; rev:3;)

# General file system errors (Champ Clark - 01/09/2014)

alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[LINUX-KERNEL] ReiserFS error"; content: "REISERFS error"; classtype: hardware-event; reference: url,wiki.quadrantsec.com/bin/view/Main/5001943; program: kernel; threshold: type limit, track by_src, count 5, seconds 300; sid: 5001943; rev:2;)
#alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[LINUX-KERNEL] Unhandled error code"; content: "Unhandled error code"; classtype: hardware-event; reference: url,wiki.quadrantsec.com/bin/view/Main/5001944; program: kernel; threshold: type limit, track by_src, count 5, seconds 300; sid: 5001944; rev:2;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[LINUX-KERNEL] I/O error"; content: "I/O error, dev"; content:!"dev fd"; classtype: hardware-event; reference: url,wiki.quadrantsec.com/bin/view/Main/5001945; program: kernel; threshold: type limit, track by_src, count 5, seconds 300; sid: 5001945; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[LINUX-KERNEL] hostbyte=DID_ERROR"; content: "hostbyte=DID_ERROR"; classtype: hardware-event; reference: url,wiki.quadrantsec.com/bin/view/Main/5001946; program: kernel; threshold: type limit, track by_src, count 5, seconds 300; sid: 5001946; rev:2;)

# HPSA (HP Raid controllers) - (Champ Clark - 05/07/2015)

alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[LINUX-KERNEL] Hard drive/RAID - FAILED abort on device"; content: "hpsa "; content: "FAILED abort on device"; classtype: hardware-event; reference: url,wiki.quadrantsec.com/bin/view/Main/5002278; program: kernel; sid:5002278; rev:2;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[LINUX-KERNEL] Hard drive/RAID - probably means device no longer present"; content: "hpsa "; content: "probably means device no longer present"; classtype: hardware-event; reference: url,wiki.quadrantsec.com/bin/view/Main/5002279; program: kernel; sid:5002279; rev:2;)

# UDP: bad checksum. From 10.XX.X.XXX:137 to 10.XX.X.XXX:137 ulen 76

#alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[LINUX-KERNEL] Bad UDP checksum"; program: UDP; content: "bad checksum.""; classtype: network-event; reference: url,wiki.quadrantsec.com/bin/view/Main/5003115; sid:5003115; rev:1;)