Skip to content

Refactoring custom wazuh rules pr devel 2.x #2542

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 3 commits into
base: devel-2.x
Choose a base branch
from
Open

Refactoring custom wazuh rules pr devel 2.x #2542

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
34565c1
Refactoring-custom-wazuh-rules
drazenCE May 27, 2025
e2b7a2a
Merge branch 'Refactoring-custom-wazuh-rules' into Refactoring-custom…
drazenCE May 27, 2025
c1cbb48
Update custom_wazuh_rules.xml
drazenCE Jun 16, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
25 changes: 19 additions & 6 deletions roles/debian/wazuh/files/custom_wazuh_rules.xml
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,18 +1,31 @@
<!-- Custom rules -->
<group name="web,accesslog">
<rule id="31151" level="10" frequency="200" timeframe="3600" overwrite="yes">
<if_matched_sid>31101</if_matched_sid>
<!-- Disable original 31151 rule -->
<rule id="31151" level="0" overwrite="yes">
<description>Disabled to prevent false positives.</description>
</rule>

<!-- Match HTTP 401 Unauthorized responses using regex -->
<rule id="41101" level="5">
<if_sid>31151</if_sid>
<regex type="pcre2">^\S+\s+-\s+(?!-)\S+\s+\[.*?\]\s+".*?"\s+401\s</regex>
<description>HTTP 401 Unauthorized response</description>
<group>web,accesslog</group>
</rule>

<!-- Correlation rule for multiple 401s -->
<rule id="41151" level="10" frequency="200" timeframe="3600">
<if_matched_sid>41101</if_matched_sid>
<same_source_ip />
<description>Multiple web server 400 error codes</description>
<description>from the same source IP.</description>
<description>Multiple 401 Unauthorized responses from the same source IP</description>
<mitre>
<id>T1595.002</id>
</mitre>
<group>web_scan,recon,pci_dss_6.5,pci_dss_11.4,gdpr_IV_35.7.d,nist_800_53_SA.11,nist_800_53_SI.4,tsc_CC6.6,tsc_CC7.1,tsc_CC8.1,tsc_CC6.1,tsc_CC6.8,tsc_CC7.2,tsc_CC7.3,</group>
<group>web_scan,recon</group>
</rule>
</group>

<group name="whitelist,">
<group name="whitelist">
<rule id="100102" level="0">
<if_sid>521</if_sid>
<match>scantem</match>
Expand Down