That is because with GET parameters is not a simple query (rule 31108):
**Phase 1: Completed pre-decoding.
full event: '10.10.10.10 hostname - [25/Feb/2016:10:10:10 -0500]
"GET /icons/whatever/?C=http://5.6.7.8/requeststringtest.php; HTTP/1.1" 200
Text...'
hostname: 'LinMV'
program_name: '(null)'
log: '10.10.10.10 hostname - [25/Feb/2016:10:10:10 -0500] "GET
/icons/whatever/?C=http://5.6.7.8/requeststringtest.php; HTTP/1.1" 200
Text...'
**Phase 2: Completed decoding.
decoder: 'web-accesslog'
srcip: '10.10.10.10'
url: '/icons/whatever/?C=http://5.6.7.8/requeststringtest.php;'
id: '200'
**Rule debugging:
Trying rule: 4 - Generic template for all web rules.
*Rule 4 matched.
*Trying child rules.
Trying rule: 31100 - Access log messages grouped.
*Rule 31100 matched.
*Trying child rules.
*Trying rule: 31108 - Ignored URLs (simple queries). Trying rule: 31511
- Blacklisted user agent (wget).*
This is working:
<!--
10.10.10.10 hostname - [25/Feb/2016:10:10:10 -0500] "GET
//path/path2/requeststringtest.php; HTTP/1.1" 200 Text...
10.10.10.10 hostname - [25/Feb/2016:10:10:10 -0500] "GET
/icons/whatever/?C=http://5.6.7.8/requeststringtest.php; HTTP/1.1" 200
Text...
-->
<rule id="100060" level="5">
*<if_sid>31100,31108</if_sid>*
<match>requeststringtest.php</match>
<description>request string test 2</description>
</rule>
Regards.
Jesus Linares.
On Thursday, February 25, 2016 at 5:11:48 PM UTC+1, James Culver wrote:
>
> Thanks. I have tested your version of the rule, and it works *so long as*
> there aren't GET parameters in the requested URI.
>
> For example, the following request triggers an alert:
> 1.2.3.4 - -[25/Feb/2016:08:43:08 -0700] "GET
> /icons/whatever/requeststringtest.php HTTP/1.1" 20068393 blahblahblah
>
> However, this request is ignored:
> 1.2.3.4 - -[25/Feb/2016:08:43:08 -0700] "GET /icons/whatever/?C=
> http://5.6.7.8/requeststringtest.php HTTP/1.1" 20068393 blahblahblah
>
> Any ideas why that is?
>
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