Docs12864/oci cloud siem (#33698)

* [DOCS-12864] Add OCI Cloud SIEM guide

* [DOCS-12864] Add OCI Cloud SIEM folder and image

* [DOCS-12864] Add OCI Cloud SIEM guide

* Apply suggestions from code review

Co-authored-by: domalessi <111786334+domalessi@users.noreply.github.com>

---------

Co-authored-by: domalessi <111786334+domalessi@users.noreply.github.com>

Author: 2 people

content/en/security/cloud_siem/guide/_index.md

@@ -14,6 +14,7 @@ disable_toc: true
     {{< nextlink href="/security/cloud_siem/guide/aws-config-guide-for-cloud-siem" >}}AWS Configuration Guide for Cloud SIEM{{< /nextlink >}}
     {{< nextlink href="/security/cloud_siem/guide/google-cloud-config-guide-for-cloud-siem/" >}}Google Cloud Configuration Guide for Cloud SIEM{{< /nextlink >}}
     {{< nextlink href="/security/cloud_siem/guide/azure-config-guide-for-cloud-siem/" >}}Azure Configuration Guide for Cloud SIEM{{< /nextlink >}}
+    {{< nextlink href="/security/cloud_siem/guide/oci-config-guide-for-cloud-siem/" >}}OCI Configuration Guide for Cloud SIEM{{< /nextlink >}}
     {{< nextlink href="security/cloud_siem/guide/monitor-authentication-logs-for-security-threats" >}}Monitor Authentication Logs for Security Threats{{< /nextlink >}}
     {{< nextlink href="/security/cloud_siem/guide/how-to-setup-security-filters-using-cloud-siem-api" >}}Security Filters with the Cloud SIEM API{{< /nextlink >}}
 {{< /whatsnext >}}

content/en/security/cloud_siem/guide/oci-config-guide-for-cloud-siem.md

@@ -0,0 +1,51 @@
+---
+title: OCI Configuration Guide for Cloud SIEM
+further_reading:
+- link: "/security/default_rules/#cat-cloud-siem-log-detection"
+  tag: "Documentation"
+  text: "Explore Cloud SIEM default detection rules"
+- link: "/security/cloud_siem/triage_and_investigate/investigate_security_signals"
+  tag: "Documentation"
+  text: "Learn about the Security Signals Explorer"
+- link: "/security/cloud_siem/detect_and_monitor/custom_detection_rules/"
+  tag: "Documentation"
+  text: "Create new detection rules"
+---
+
+## Overview
+
+Cloud SIEM applies detection rules to all processed logs in Datadog to detect threats such as targeted attacks, communication with threat intel-listed IPs, or insecure resource modifications. Detected threats are surfaced as Security Signals in the Security Signals Explorer for triage.
+
+This guide walks you through the following steps to start detecting threats with your OCI Audit logs:
+
+1. [Set up Datadog’s OCI integration](#set-up-datadogs-oci-integration)  
+2. [Enable log collection](#enable-log-collection)
+3. [Use Cloud SIEM to triage Security Signals](#use-cloud-siem-to-triage-security-signals)
+
+## Set up Datadog’s OCI integration
+
+Set up Datadog’s [OCI integration][5] using either the QuickStart (recommended) or the Terraform method.
+
+## Enable log collection
+
+Ensure that log collection is enabled in the Datadog OCI integration tile:
+
+{{< img src="security/cloud_siem/guide/oci_config_guide/oci_logs_enabled.png" alt="The OCI integration tile in Datadog with log collection enabled" style="width:90%;" >}}
+
+## Use Cloud SIEM to triage Security Signals
+
+Cloud SIEM applies out-of-the-box detection rules to all processed logs, including your OCI Audit logs. When a threat is detected with a detection rule, a Security Signal is generated and can be viewed in the Security Signals Explorer.
+
+- Go to the [Cloud SIEM Signals Explorer][1] to view and triage threats. See [Investigate Security Signals][2] for further details.  
+- See [out-of-the-box detection rules][3] that are applied to your logs.  
+- [Create rules][4] to detect threats that match your specific use case.
+
+## Further reading
+
+{{< partial name="whats-next/whats-next.html" >}}
+
+[1]: https://app.datadoghq.com/security/siem/signals
+[2]: /security/cloud_siem/triage_and_investigate/investigate_security_signals/
+[3]: /security/default_rules/#cat-cloud-siem
+[4]: /security/detection_rules/#create-detection-rules
+[5]: /integrations/oracle-cloud-infrastructure/?tab=createvcnrecommended