[Deprecation] AWS Redshift Cluster Creation (#5367)

`CreateCluster` is a common Redshift lifecycle operation that occurs frequently in normal workflows. Creating a new Redshift cluster offers no real advantage to an attacker and outside of cost, does not produce material impact for a target environment. This behavior aligns more with cloud infrastructure monitoring or posture management, which is important but not the focus of our detection ruleset.

Real world Redshift abuse centers on misuse of existing resources, such as snapshot sharing or copying or exposing the cluster through permissive VPC security group changes. These threat paths should be covered by other rules. Deprecating this creation-focused rule reduces noise and keeps the AWS ruleset aligned with real threat surfaces rather than infrastructure management.

(cherry picked from commit 9b26cd2)

Author: imays11

rules/integrations/aws/persistence_redshift_instance_creation.toml

@@ -2,7 +2,7 @@
 creation_date = "2022/04/12"
 integration = ["aws"]
 maturity = "production"
-updated_date = "2025/01/15"
+updated_date = "2025/11/25"
 
 [rule]
 author = ["Elastic"]
@@ -23,13 +23,13 @@ index = ["filebeat-*", "logs-aws.cloudtrail-*"]
 interval = "10m"
 language = "kuery"
 license = "Elastic License v2"
-name = "AWS Redshift Cluster Creation"
+name = "Deprecated - AWS Redshift Cluster Creation"
 note = """## Triage and analysis
 
 > **Disclaimer**:
 > This investigation guide was created using generative AI technology and has been reviewed to improve its accuracy and relevance. While every effort has been made to ensure its quality, we recommend validating the content and adapting it to suit your specific environment and operational needs.
 
-### Investigating AWS Redshift Cluster Creation
+### Investigating Deprecated - AWS Redshift Cluster Creation
 
 Amazon Redshift is a data warehousing service that allows for scalable data storage and analysis. In a secure environment, only authorized users should create Redshift clusters. Adversaries might exploit misconfigured permissions to create clusters, potentially leading to data exfiltration or unauthorized data processing. The detection rule monitors for successful cluster creation events, especially by non-admin users, to identify potential misuse or misconfigurations.