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20 hours ago •
wazuh
wazuh
Use stock version from ossec.conf for configuration in Wazuh manager
Study the possibility of using a stock version of ossec.conf for all automation processes.
Template use in:
- wazuh-ansible/
- https://github.com/wazuh/wazuh-ansible/blob/4.2/roles/wazuh/ansible-wazuh-manager/templates/var-ossec-etc-ossec-server.conf.j2
- wazuh-docker/
- https://github.com/wazuh/wazuh-docker/blob/4.2/production_cluster/wazuh_cluster/wazuh_manager.conf
Wazuh manager in
- wazuh-wazuh/
- https://github.com/wazuh/wazuh/blob/4.2/etc/ossec.conf
- https://github.com/wazuh/wazuh/tree/4.2/etc/templates/config
- This is the structure of templates. That in installation, create the ossec.conf for the installed operating system.
I attach the newly installed ossec.conf from an Ubuntu 20.04 system
<!--
Wazuh - Manager - Default configuration for ubuntu 20.04
More info at: https://documentation.wazuh.com
Mailing list: https://groups.google.com/forum/#!forum/wazuh
-->
<ossec_config>
<global>
<jsonout_output>yes</jsonout_output>
<alerts_log>yes</alerts_log>
<logall>no</logall>
<logall_json>no</logall_json>
<email_notification>no</email_notification>
<smtp_server>smtp.example.wazuh.com</smtp_server>
<email_from>[email protected]</email_from>
<email_to>[email protected]</email_to>
<email_maxperhour>12</email_maxperhour>
<email_log_source>alerts.log</email_log_source>
<agents_disconnection_time>10m</agents_disconnection_time>
<agents_disconnection_alert_time>0</agents_disconnection_alert_time>
</global>
<alerts>
<log_alert_level>3</log_alert_level>
<email_alert_level>12</email_alert_level>
</alerts>
<!-- Choose between "plain", "json", or "plain,json" for the format of internal logs -->
<logging>
<log_format>plain</log_format>
</logging>
<remote>
<connection>secure</connection>
<port>1514</port>
<protocol>tcp</protocol>
<queue_size>131072</queue_size>
</remote>
<!-- Policy monitoring -->
<rootcheck>
<disabled>no</disabled>
<check_files>yes</check_files>
<check_trojans>yes</check_trojans>
<check_dev>yes</check_dev>
<check_sys>yes</check_sys>
<check_pids>yes</check_pids>
<check_ports>yes</check_ports>
<check_if>yes</check_if>
<!-- Frequency that rootcheck is executed - every 12 hours -->
<frequency>43200</frequency>
<rootkit_files>etc/rootcheck/rootkit_files.txt</rootkit_files>
<rootkit_trojans>etc/rootcheck/rootkit_trojans.txt</rootkit_trojans>
<skip_nfs>yes</skip_nfs>
</rootcheck>
<wodle name="cis-cat">
<disabled>yes</disabled>
<timeout>1800</timeout>
<interval>1d</interval>
<scan-on-start>yes</scan-on-start>
<java_path>wodles/java</java_path>
<ciscat_path>wodles/ciscat</ciscat_path>
</wodle>
<!-- Osquery integration -->
<wodle name="osquery">
<disabled>yes</disabled>
<run_daemon>yes</run_daemon>
<log_path>/var/log/osquery/osqueryd.results.log</log_path>
<config_path>/etc/osquery/osquery.conf</config_path>
<add_labels>yes</add_labels>
</wodle>
<!-- System inventory -->
<wodle name="syscollector">
<disabled>no</disabled>
<interval>1h</interval>
<scan_on_start>yes</scan_on_start>
<hardware>yes</hardware>
<os>yes</os>
<network>yes</network>
<packages>yes</packages>
<ports all="no">yes</ports>
<processes>yes</processes>
<!-- Database synchronization settings -->
<synchronization>
<max_eps>10</max_eps>
</synchronization>
</wodle>
<sca>
<enabled>yes</enabled>
<scan_on_start>yes</scan_on_start>
<interval>12h</interval>
<skip_nfs>yes</skip_nfs>
</sca>
<vulnerability-detector>
<enabled>no</enabled>
<interval>5m</interval>
<ignore_time>6h</ignore_time>
<run_on_start>yes</run_on_start>
<!-- Ubuntu OS vulnerabilities -->
<provider name="canonical">
<enabled>no</enabled>
<os>trusty</os>
<os>xenial</os>
<os>bionic</os>
<os>focal</os>
<update_interval>1h</update_interval>
</provider>
<!-- Debian OS vulnerabilities -->
<provider name="debian">
<enabled>no</enabled>
<os>stretch</os>
<os>buster</os>
<update_interval>1h</update_interval>
</provider>
<!-- RedHat OS vulnerabilities -->
<provider name="redhat">
<enabled>no</enabled>
<os>5</os>
<os>6</os>
<os>7</os>
<os>8</os>
<update_interval>1h</update_interval>
</provider>
<!-- Windows OS vulnerabilities -->
<provider name="msu">
<enabled>yes</enabled>
<update_interval>1h</update_interval>
</provider>
<!-- Aggregate vulnerabilities -->
<provider name="nvd">
<enabled>yes</enabled>
<update_from_year>2010</update_from_year>
<update_interval>1h</update_interval>
</provider>
</vulnerability-detector>
<!-- File integrity monitoring -->
<syscheck>
<disabled>no</disabled>
<!-- Frequency that syscheck is executed default every 12 hours -->
<frequency>43200</frequency>
<scan_on_start>yes</scan_on_start>
<!-- Generate alert when new file detected -->
<alert_new_files>yes</alert_new_files>
<!-- Don't ignore files that change more than 'frequency' times -->
<auto_ignore frequency="10" timeframe="3600">no</auto_ignore>
<!-- Directories to check (perform all possible verifications) -->
<directories>/etc,/usr/bin,/usr/sbin</directories>
<directories>/bin,/sbin,/boot</directories>
<!-- Files/directories to ignore -->
<ignore>/etc/mtab</ignore>
<ignore>/etc/hosts.deny</ignore>
<ignore>/etc/mail/statistics</ignore>
<ignore>/etc/random-seed</ignore>
<ignore>/etc/random.seed</ignore>
<ignore>/etc/adjtime</ignore>
<ignore>/etc/httpd/logs</ignore>
<ignore>/etc/utmpx</ignore>
<ignore>/etc/wtmpx</ignore>
<ignore>/etc/cups/certs</ignore>
<ignore>/etc/dumpdates</ignore>
<ignore>/etc/svc/volatile</ignore>
<!-- File types to ignore -->
<ignore type="sregex">.log$|.swp$</ignore>
<!-- Check the file, but never compute the diff -->
<nodiff>/etc/ssl/private.key</nodiff>
<skip_nfs>yes</skip_nfs>
<skip_dev>yes</skip_dev>
<skip_proc>yes</skip_proc>
<skip_sys>yes</skip_sys>
<!-- Nice value for Syscheck process -->
<process_priority>10</process_priority>
<!-- Maximum output throughput -->
<max_eps>100</max_eps>
<!-- Database synchronization settings -->
<synchronization>
<enabled>yes</enabled>
<interval>5m</interval>
<max_interval>1h</max_interval>
<max_eps>10</max_eps>
</synchronization>
</syscheck>
<!-- Active response -->
<global>
<white_list>127.0.0.1</white_list>
<white_list>^localhost.localdomain$</white_list>
<white_list>127.0.0.53</white_list>
</global>
<command>
<name>disable-account</name>
<executable>disable-account</executable>
<timeout_allowed>yes</timeout_allowed>
</command>
<command>
<name>restart-wazuh</name>
<executable>restart-wazuh</executable>
</command>
<command>
<name>firewall-drop</name>
<executable>firewall-drop</executable>
<timeout_allowed>yes</timeout_allowed>
</command>
<command>
<name>host-deny</name>
<executable>host-deny</executable>
<timeout_allowed>yes</timeout_allowed>
</command>
<command>
<name>route-null</name>
<executable>route-null</executable>
<timeout_allowed>yes</timeout_allowed>
</command>
<command>
<name>win_route-null</name>
<executable>route-null.exe</executable>
<timeout_allowed>yes</timeout_allowed>
</command>
<command>
<name>netsh</name>
<executable>netsh.exe</executable>
<timeout_allowed>yes</timeout_allowed>
</command>
<!--
<active-response>
active-response options here
</active-response>
-->
<!-- Log analysis -->
<localfile>
<log_format>command</log_format>
<command>df -P</command>
<frequency>360</frequency>
</localfile>
<localfile>
<log_format>full_command</log_format>
<command>netstat -tulpn | sed 's/\([[:alnum:]]\+\)\ \+[[:digit:]]\+\ \+[[:digit:]]\+\ \+\(.*\):\([[:digit:]]*\)\ \+\([0-9\.\:\*]\+\).\+\ \([[:digit:]]*\/[[:alnum:]\-]*\).*/\1 \2 == \3 == \4 \5/' | sort -k 4 -g | sed 's/ == \(.*\) ==/:\1/' | sed 1,2d</command>
<alias>netstat listening ports</alias>
<frequency>360</frequency>
</localfile>
<localfile>
<log_format>full_command</log_format>
<command>last -n 20</command>
<frequency>360</frequency>
</localfile>
<ruleset>
<!-- Default ruleset -->
<decoder_dir>ruleset/decoders</decoder_dir>
<rule_dir>ruleset/rules</rule_dir>
<rule_exclude>0215-policy_rules.xml</rule_exclude>
<list>etc/lists/audit-keys</list>
<list>etc/lists/amazon/aws-eventnames</list>
<list>etc/lists/security-eventchannel</list>
<!-- User-defined ruleset -->
<decoder_dir>etc/decoders</decoder_dir>
<rule_dir>etc/rules</rule_dir>
</ruleset>
<rule_test>
<enabled>yes</enabled>
<threads>1</threads>
<max_sessions>64</max_sessions>
<session_timeout>15m</session_timeout>
</rule_test>
<!-- Configuration for wazuh-authd -->
<auth>
<disabled>no</disabled>
<port>1515</port>
<use_source_ip>no</use_source_ip>
<force_insert>yes</force_insert>
<force_time>0</force_time>
<purge>yes</purge>
<use_password>no</use_password>
<ciphers>HIGH:!ADH:!EXP:!MD5:!RC4:!3DES:!CAMELLIA:@STRENGTH</ciphers>
<!-- <ssl_agent_ca></ssl_agent_ca> -->
<ssl_verify_host>no</ssl_verify_host>
<ssl_manager_cert>etc/sslmanager.cert</ssl_manager_cert>
<ssl_manager_key>etc/sslmanager.key</ssl_manager_key>
<ssl_auto_negotiate>no</ssl_auto_negotiate>
</auth>
<cluster>
<name>wazuh</name>
<node_name>node01</node_name>
<node_type>master</node_type>
<key></key>
<port>1516</port>
<bind_addr>0.0.0.0</bind_addr>
<nodes>
<node>NODE_IP</node>
</nodes>
<hidden>no</hidden>
<disabled>yes</disabled>
</cluster>
</ossec_config>
<ossec_config>
<localfile>
<log_format>syslog</log_format>
<location>/var/ossec/logs/active-responses.log</location>
</localfile>
<localfile>
<log_format>syslog</log_format>
<location>/var/log/auth.log</location>
</localfile>
<localfile>
<log_format>syslog</log_format>
<location>/var/log/syslog</location>
</localfile>
<localfile>
<log_format>syslog</log_format>
<location>/var/log/dpkg.log</location>
</localfile>
<localfile>
<log_format>syslog</log_format>
<location>/var/log/kern.log</location>
</localfile>
</ossec_config>
We had an analysis meeting with @okynos and @ teddytpc1:
Problem analyzed:
- Lack of a stock ossec template.
- Need to make changes in modules in:
- Installation and post installation processes in wazuh-docker, wazuh-ansible, and other private repos.
- The current ossec.conf does not follow the yaml standard. That would allow changing values of modules and parameters in a simple way.
Options analyzed:
- Apply the post installation change, generating:
- In the case of repeated fields, a duplication of modules ...
- in the case of unique fields, deletion and change of values.
- This is the option that was chosen to evaluate and analyze the timing and implications of possible problems.
- Create a stock version of ossec.conf to be used from all automation repos, ansible, docker, and others.
Steps to follow:
- Consult with the CORE team:
- About times and standard that they will use, in the new version of ossec.conf
- CICD team:
- Reanalysis on performing a PoC based on current ossec.conf conditions
- Evaluation of pros vs cons, and times of the possible jobs that are opened from the information that we will be collecting.
I quote the CORE team's response (@chemamartinez):
The ossec.conf is generated at installation time from these templates https://github.com/wazuh/wazuh/tree/master/etc/templates/config, depending on the OS it assembles the config, joining that of each component. Here you can see how it is mounted https://github.com/wazuh/wazuh/blob/9ace2581e37afb9e16dc11d9fdb4c7a9c87fdd97/src/init/inst-functions.sh#L436 Then there is a plan to pass the current XML to YML but I can't find an issue right now about this, and there is no estimated date for this.
This issue will be addressed here:
- https://github.com/wazuh/wazuh-automation/issues/1507
