Hi all, and thanks for reading.

I am new to ossec, however, I've got my system up and running without any 
problems. Now I have to finetune it for my network, and here is where my 
troubles start.

I am getting alerts that I need to ignore. Most local rules work fine, but 
one alert is giving me a headache.

rule.sid 31533

192.168.70.36 - - [29/Jul/2016:08:53:36 +0200] "POST /zabbix/zabbix.php?ac
tion=widget.system.view&sid=c55a80ec836cf855&upd_counter=26&pmasterid=dashboard 
HTTP/1.1" 200 9811 
"http://zabbix.electromach.nl/zabbix/zabbix.php?action=dashboard.view"; 
"Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:47.0) Gecko/20100101 Firefox/47.0"

This results in the following:

**Phase 1: Completed pre-decoding.
       full event: '192.168.70.36 - - [29/Jul/2016:08:53:36 +0200] "POST 
/zabbix/zabbix.php?action=widget.system.view&sid=c55a80ec836cf855&upd_counter=26&pmasterid=dashboard
 
HTTP/1.1" 200 9811 
"http://zabbix.electromach.nl/zabbix/zabbix.php?action=dashboard.view"; 
"Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:47.0) Gecko/20100101 
Firefox/47.0"'
       hostname: 'wazuh'
       program_name: '(null)'
       log: '192.168.70.36 - - [29/Jul/2016:08:53:36 +0200] "POST 
/zabbix/zabbix.php?action=widget.system.view&sid=c55a80ec836cf855&upd_counter=26&pmasterid=dashboard
 
HTTP/1.1" 200 9811 
"http://zabbix.electromach.nl/zabbix/zabbix.php?action=dashboard.view"; 
"Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:47.0) Gecko/20100101 
Firefox/47.0"'

**Phase 2: Completed decoding.
       decoder: 'web-accesslog'
       srcip: '192.168.70.36'
       url: 
'/zabbix/zabbix.php?action=widget.system.view&sid=c55a80ec836cf855&upd_counter=26&pmasterid=dashboard'
       id: '200'

**Phase 3: Completed filtering (rules).
       Rule id: '31530'
       Level: '3'
       Description: 'POST request received.'

sid 31530 leads up to 31533 in the second stage via <if_matched_sid>

 <rule id="31533" level="10" timeframe="20" frequency="6">
    <if_matched_sid>31530</if_matched_sid>
    <same_source_ip />
    <description>High amount of POST requests in a small period of time 
(likely bot).</description>
   <group>pci_dss_6.5,pci_dss_11.4,</group>
   </rule>


I've created the following local rule (among many, been trying things for 
hours):

<rule id="100034" level="0">
    <if_sid>31533</if_sid>
    <match>POST /zabbix/zabbix.php</match>
    <decoded_as>web-accesslog</decoded_as>
    
<url>http://zabbix.electromach.nl/zabbix/zabbix.php?action=dashboard.view</url>
    <description>Ignore all zabbix view requests</description>
  </rule>
</group>

Whatever I do, it always ends up on level 3.
Ofcourse I restart ossec after editing my rules.

Can someone help me out with this?

Thanks in advance.


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