etc/rules/sendmail_rules.xml

   1 <!-- @(#) $Id$
   2   -  Official sendmail rules for OSSEC.
   3   -  Author: Ahmet Ozturk
   4   -  Author: Daniel B. Cid
   5   -  License: http://www.ossec.net/en/licensing.html
   6   -->
   7
   8
   9 <group name="syslog,sendmail,">
  10   <rule id="3100" level="0">
  11     <decoded_as>sendmail-reject</decoded_as>
  12     <description>Grouping of the sendmail rules.</description>
  13   </rule>
  14
  15   <rule id="3101" level="0" noalert="1">
  16     <if_sid>3100</if_sid>
  17     <match>reject=</match>
  18     <description>Grouping of the sendmail reject rules.</description>
  19   </rule>
  20
  21   <rule id="3102" level="5">
  22     <if_sid>3101</if_sid>
  23     <match>reject=451 4.1.8 </match>
  24     <description>Sender domain does not have any valid </description>
  25     <description>MX record (Requested action aborted).</description>
  26     <group>spam,</group>
  27   </rule>
  28
  29   <rule id="3103" level="6">
  30     <if_sid>3101</if_sid>
  31     <match>reject=550 5.0.0 |reject=553 5.3.0</match>
  32     <description>Rejected by access list </description>
  33     <description>(55x: Requested action not taken).</description>
  34     <group>spam,</group>
  35   </rule>
  36
  37   <rule id="3104" level="6">
  38     <if_sid>3101</if_sid>
  39     <match>reject=550 5.7.1 </match>
  40     <description>Attepmt to use mail server as relay </description>
  41     <description>(550: Requested action not taken).</description>
  42     <group>spam,</group>
  43   </rule>
  44
  45   <rule id="3105" level="5">
  46     <if_sid>3101</if_sid>
  47     <match>reject=553 5.1.8 </match>
  48     <description>Sender domain is not found </description>
  49     <description> (553: Requested action not taken).</description>
  50     <group>spam,</group>
  51   </rule>
  52
  53   <rule id="3106" level="5">
  54     <if_sid>3101</if_sid>
  55     <match>reject=553 5.5.4 </match>
  56     <description>Sender address does not have domain </description>
  57     <description>(553: Requested action not taken).</description>
  58     <group>spam,</group>
  59   </rule>
  60
  61   <rule id="3107" level="4">
  62     <if_sid>3101</if_sid>
  63     <description>Sendmail rejected message.</description>
  64   </rule>
  65
  66   <rule id="3108" level="6">
  67     <if_sid>3100</if_sid>
  68     <match>rejecting commands from</match>
  69     <description>Sendmail rejected due to pre-greeting.</description>
  70     <group>spam,</group>
  71   </rule>
  72
  73   <rule id="3109" level="8">
  74     <if_sid>3100</if_sid>
  75     <match>savemail panic</match>
  76     <description>Sendmail save mail panic.</description>
  77     <group>system_error,</group>
  78   </rule>
  79
  80   <rule id="3151" level="10" frequency="6" timeframe="120">
  81     <if_matched_sid>3102</if_matched_sid>
  82     <same_source_ip />
  83     <description>Sender domain has bogus MX record. </description>
  84     <description>It should not be sending e-mail.</description>
  85     <group>multiple_spam,</group>
  86   </rule>
  87
  88   <rule id="3152" level="6" frequency="6" timeframe="120">
  89     <if_matched_sid>3103</if_matched_sid>
  90     <same_source_ip />
  91     <description>Multiple attempts to send e-mail from a </description>
  92     <description>previously rejected sender (access).</description>
  93     <group>multiple_spam,</group>
  94   </rule>
  95
  96   <rule id="3153" level="6" frequency="6" timeframe="120">
  97     <if_matched_sid>3104</if_matched_sid>
  98     <same_source_ip />
  99     <description>Multiple relaying attempts of spam.</description>
 100     <group>multiple_spam,</group>
 101   </rule>
 102
 103   <rule id="3154" level="10" frequency="6" timeframe="120">
 104     <if_matched_sid>3105</if_matched_sid>
 105     <same_source_ip />
 106     <description>Multiple attempts to send e-mail </description>
 107     <description>from invalid/unknown sender domain.</description>
 108     <group>multiple_spam,</group>
 109   </rule>
 110
 111   <rule id="3155" level="10" frequency="6" timeframe="120">
 112     <if_matched_sid>3106</if_matched_sid>
 113     <same_source_ip />
 114     <description>Multiple attempts to send e-mail from </description>
 115     <description>invalid/unknown sender.</description>
 116     <group>multiple_spam,</group>
 117   </rule>
 118
 119   <rule id="3156" level="10" frequency="10" timeframe="120">
 120     <if_matched_sid>3107</if_matched_sid>
 121     <same_source_ip />
 122     <description>Multiple rejected e-mails from same source ip.</description>
 123     <group>multiple_spam,</group>
 124   </rule>
 125
 126   <rule id="3158" level="10" frequency="6" timeframe="120">
 127     <if_matched_sid>3108</if_matched_sid>
 128     <same_source_ip />
 129     <description>Multiple pre-greetings rejects.</description>
 130     <group>multiple_spam,</group>
 131   </rule>
 132
 133
 134    <!-- Rules for SMF-SAV -->
 135    <rule id="3190" level="0">
 136      <decoded_as>smf-sav-reject</decoded_as>
 137      <description>Grouping of the smf-sav sendmail milter rules.</description>
 138      <group>smf-sav,</group>
 139    </rule>
 140
 141    <rule id="3191" level="6">
 142      <if_sid>3190</if_sid>
 143      <match>^sender check failed|^sender check tempfailed</match>
 144      <description>SMF-SAV sendmail milter unable to verify </description>
 145      <description>address (REJECTED).</description>
 146      <group>smf-sav,spam,</group>
 147    </rule>
 148
 149 </group> <!-- SYSLOG,SENDMAIL -->