Hi Gokul,
I believe you can enable audit logs by following these Oracle official sites.
https://docs.oracle.com/en/cloud/paas/management-cloud/collect-database-audit-logs/index.html
https://docs.oracle.com/cd/E11882_01/server.112/e10575/tdpsg_auditing.htm
I have attached the Oracle site about how to configure syslog audit logs. I suggest you to follow this.
https://docs.oracle.com/cd/E36784_01/html/E37127/audittask-11.html
You can configure syslog in the Wazuh server and collect logs directly from the Wazuh manager. To that you can follow this.
https://documentation.wazuh.com/current/user-manual/capabilities/log-data-collection/syslog.html
Alternatively, If your Oracle DB logs are written to a specific log file, you can install the Wazuh agent on the endpoint and configure to the log collection in agent's ossec.conf file.
Wazuh agent on Solaris: https://documentation.wazuh.com/current/installation-guide/wazuh-agent/wazuh-agent-package-solaris.html
You can follow this guide to learn about how to configure the collection on the endpoint.
Further, if your logs do not match any decoder and rules, you need to create custom decoders and rules to extract the event details to fields and generate alerts.
You can the logs using Wazuh-logtest to match any decoders and rules.
Simply copy the log and paste the log after executing this command.
/var/ossec/bin/wazuh-logtest
If no decoders and rules, you can learn from these official sites to create custom decoders and rules.
https://documentation.wazuh.com/current/user-manual/ruleset/decoders/custom.html
https://documentation.wazuh.com/current/user-manual/ruleset/ruleset-xml-syntax/decoders.html
https://documentation.wazuh.com/current/user-manual/ruleset/ruleset-xml-syntax/rules.html
https://documentation.wazuh.com/current/user-manual/ruleset/rules/custom.html#custom-rules
https://wazuh.com/blog/creating-decoders-and-rules-from-scratch/
Let me know if this helps.