File: zimbra-geoip.rules

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# Sagan zimbra-geoip.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.
#
#*************************************************************
#
# See zimbra-geoip.rules for setup information.

# For /var/log/zimbra.log

# Dec  7 13:59:30 a postfix/smtps/smtpd[28325]: 755F86401D84: client=unknown[10.10.1.10], sasl_method=PLAIN, sasl_username=frank

alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[ZIMBRA-GEOIP] SASL Authentication from outside HOME_COUNTRY"; content: "sasl_method="; content: "sasl_username="; classtype: successful-user; reference: url,wiki.quadrantsec.com/bin/view/Main/5003034; parse_src_ip: 1; program: zimbra; country_code: track by_src, isnot $HOME_COUNTRY; sid:5003034; rev:2;)

# For /var/log/nginx.log

# 10.10.1.10|local7|info|info|be|2016-12-07|15:06:10|nginx| 2016/12/07 10:28:47 [info] 28154#0: *4727323 client logged in, client: 91.131.2.231:57872, server: 0.0.0.0:993, login: "frank", upstream: 10.10.1.10:7993 (91.131.2.231:57872->10.7.1.73:993) <=> (10.10.1.10:35026->10.7.1.73:7993)

alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[ZIMBRA-GEOIP] NGNIX Authentication from outside HOME_COUNTRY"; content: "client logged in"; classtype: successful-user; reference: url,wiki.quadrantsec.com/bin/view/Main/5003035; parse_src_ip: 1; program: ngnix; country_code: track by_src, isnot $HOME_COUNTRY; sid:5003035; rev:2;)

# For /var/log/ews.log

# 2016-12-07 00:05:42,514 INFO  [qtp1684106402-2033718:https:https://webmail.example.com:8443/ews/Exchange.asmx] [name=frank@example.com;ip=73.15.217.31;port=51998;ua=MacOSX/(G)ExchangeWebServices/()AddressBookSourceSync/();] ews - The account: 9d89ec1f-19b1-4785-8f3a-c4e0427ce48b is on local server.

alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[ZIMBRA-GEOIP] EWS Authentication from outside HOME_COUNTRY"; content: "is on local server"; classtype: successful-user; reference: url,wiki.quadrantsec.com/bin/view/Main/5003036; parse_src_ip: 1; program: ews; country_code: track by_src, isnot $HOME_COUNTRY; sid:5003036; rev:2;)