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InformationalSplunk security contentJose Hernandez +1

Detect Web Access to Decommissioned S3 Bucket

This detection identifies web requests to domains that match previously decommissioned S3 buckets through web proxy logs. This activity is significant because attackers may attempt to access or recreate deleted S3…

Description

This detection identifies web requests to domains that match previously decommissioned S3 buckets through web proxy logs. This activity is significant because attackers may attempt to access or recreate deleted S3 buckets that were previously public to hijack them for malicious purposes. If successful, this could allow attackers to host malicious content or exfiltrate data through compromised bucket names that may still be referenced by legitimate applications.

Detection logic

Detection requirements

Platform
ContainersESXiIaaSLinuxmacOSWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source category
aws_cloudfront

Known benign triggers

  • Some applications or web pages may continue to reference old S3 bucket URLs after they have been decommissioned. These should be investigated and updated to prevent potential security risks.

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