--- /dev/null
+<!-- @(#) $Id: ./etc/rules/ms-exchange_rules.xml, 2011/09/08 dcid Exp $
+
+ - Example of MS Exchange rules for OSSEC.
+ -
+ - Copyright (C) 2009 Trend Micro Inc.
+ - All rights reserved.
+ -
+ - This program is a free software; you can redistribute it
+ - and/or modify it under the terms of the GNU General Public
+ - License (version 2) as published by the FSF - Free Software
+ - Foundation.
+ -
+ - License details: http://www.ossec.net/en/licensing.html
+ -->
+
+
+<!-- Still BETA - anyone using it? -->
+
+
+<group name="ms,exchange,">
+ <rule id="3800" level="0">
+ <decoded_as>msexchange</decoded_as>
+ <description>Grouping of Exchange rules.</description>
+ </rule>
+
+ <rule id="3801" level="4">
+ <if_sid>3800</if_sid>
+ <action>RCPT</action>
+ <id>^550</id>
+ <description>E-mail rcpt is not valid (invalid account).</description>
+ <group>spam,</group>
+ </rule>
+
+ <rule id="3802" level="4">
+ <if_sid>3800</if_sid>
+ <id>^5</id>
+ <description>E-mail 500 error code.</description>
+ <group>spam,</group>
+ </rule>
+
+ <rule id="3851" level="9" frequency="10" timeframe="120" ignore="120">
+ <if_matched_sid>3801</if_matched_sid>
+ <same_source_ip />
+ <description>Multiple e-mail attempts to an invalid account.</description>
+ <group>multiple_spam,</group>
+ </rule>
+
+ <rule id="3852" level="9" frequency="12" timeframe="120" ignore="240">
+ <if_matched_sid>3802</if_matched_sid>
+ <same_source_ip />
+ <description>Multiple e-mail 500 error code (spam).</description>
+ <group>multiple_spam,</group>
+ </rule>
+
+
+</group> <!-- MS,Exchange -->