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as400.rules
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# Copyright (c) 2009-2023. Quadrant Information Security <www.quadrantsec.com>
# All rights reserved.
#
# Please submit any custom rules or ideas to [email protected] 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 rules were created from output from iSecurity for AS/400's. The signature are probably
# generic enough to work with anything.
# https://seasoft.com/products/solutions-for-ibm-i/audit-compliance-management/isecurity-syslog
# 10.16.10.200|local6|crit|crit|b2|2018-04-27|13:28:13|CSYS| iSecurity/Audit: MPW1600 PW/P *AUTFAIL An incorrect password was entered. User GUEST. Device XXXXXXXX. Remote location . Local location . Network Id .
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[AS400] AUTFAIL An incorrect password was entered"; content: " MPW1600 "; parse_src_ip: 1; default_proto: tcp; classtype: unsuccessful-user; normalize; after: track by_username, count 3, seconds 900; threshold: type suppress, track by_username, count 2, seconds 900; sid:5003771; rev:2;)
# 10.16.101.200|local6|alert|alert|b1|2018-03-19|11:39:12|CSYS| iSecurity/Audit: MPW1800 PW/R *AUTFAIL Attempted signon (user authentication) failed because password was expired.
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[AS400] AUTFAIL fail - password expired [no username]"; content: " MPW1800 "; default_proto: tcp; classtype: unsuccessful-user; normalize; after: track by_username, count 3, seconds 900; threshold: type suppress, track by_username, count 2, seconds 900; sid:5003772; rev:1;)
# 10.16.101.200|local6|alert|alert|b1|2018-03-19|05:25:26|CSYS| iSecurity/Audit: MVP1600 VP/P *AUTFAIL User GUEST; An incorrect network password was used. Server *SYSTEM. Computer ::ffff:1.
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[AS400] AUTFAIL - incorrect network password was used"; content: " MVP1600 "; parse_src_ip: 1; default_proto: tcp; classtype: unsuccessful-user; normalize; after: track by_username, count 3, seconds 900; threshold: type suppress, track by_username, count 2, seconds 900; sid:5003773; rev:2;)
# 10.16.101.200|local6|alert|alert|b1|2018-03-14|14:41:26|CSYS| iSecurity/Audit: MAF0100 AF/A *AUTFAIL User GUEST; Not authorized to object QSYS/XXXXXXX *LIB in program /. Path name .
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[AS400] AUTFAIL - Not authorized to object"; content: " MAF0100 "; default_proto: tcp; classtype: unsuccessful-user; normalize; after: track by_username, count 3, seconds 900; threshold: type suppress, track by_username, count 2, seconds 900; sid:5003774; rev:1;)
# 10.16.101.200|local6|crit|crit|b2|2018-03-23|17:32:56|CSYS| iSecurity/Audit: MPW2100 PW/U *AUTFAIL User name GUEST not valid. Device . Remote location . Local location . Network Id .
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[AS400] AUTFAIL - User name not valid"; content: " MAF0100 "; parse_src_ip: 1; default_proto: tcp; classtype: unsuccessful-user; normalize; after: track by_username, count 3, seconds 900; threshold: type suppress, track by_username, count 2, seconds 900; sid:5003775; rev:2;)
# 10.16.101.200|local6|err|err|b3|2018-03-19|19:33:32|CSYS| iSecurity/Audit: MAF1100 AF/K *AUTFAIL User GUEST attempted to perform an operation on QSYS/QTEDBGS *SRVPGM without the required Special Authority. JOB 111111/GUEST/XXXXXXXXXX.
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[AS400] AUTFAIL - Operation SVRPGM wihtout authority"; content: " MAF1100 "; default_proto: tcp; classtype: unsuccessful-user; normalize; after: track by_username, count 3, seconds 900; threshold: type suppress, track by_username, count 2, seconds 900; sid:5003776; rev:1;)
# 10.16.101.200|local6|alert|alert|b1|2018-04-27|14:01:07|CSYS| iSecurity/Audit: MPW1700 PW/Q *AUTFAIL User GUEST. Attempted signon (user authentication) failed because user GUEST profile was disabled.
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[AS400] AUTFAIL - Failed because profile was disabled"; content: " MPW1700 "; default_proto: tcp; classtype: unsuccessful-user; normalize; after: track by_username, count 3, seconds 900; threshold: type suppress, track by_username, count 2, seconds 900; sid:5003777; rev:1;)
# Might be noisey
#
# 10.16.101.200|local6|alert|alert|b1|2018-03-12|20:07:26|CSYS| iSecurity/Audit: MAF0100 AF/A *AUTFAIL User GUEST; Not authorized to object *N/*N *DIR in program /. Path name /home/GUEST.
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[AS400] AUTFAIL - User not authorized to object"; content: " MAF0100 "; default_proto: tcp; classtype: unsuccessful-user; normalize; after: track by_username, count 3, seconds 900; threshold: type suppress, track by_username, count 2, seconds 900; sid:5003778; rev:1;)
# 10.16.101.200|local6|notice|notice|b5|2018-04-24|18:18:50|CSYS| iSecurity/Audit: MAD2100 AD/U *SECURITY User GUEST; XXXXXXX used to change auditing of user GUEST. Job 111111/GUEST/XXXXXXXXX.
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[AS400] AUTFAIL - Changed audit status of user"; content: " MAD2100 "; default_proto: tcp; classtype: unsuccessful-user; normalize; after: track by_username, count 3, seconds 900; threshold: type suppress, track by_username, count 2, seconds 900; sid:5003779; rev:1;)