AWS S3 Buckets enumeration activity

Cortex XSIAM Analytics Alert Reference by Alert name

Product
Cortex XSIAM
Last date published
2026-01-27
Category
Analytics Alert Reference
Index by
Alert name

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

1 Hour

Deduplication Period

1 Day

Required Data

  • Requires:
    • AWS Audit Log

Detection Modules

Cloud

Detector Tags

ATT&CK Tactic

Discovery (TA0007)

ATT&CK Technique

Cloud Infrastructure Discovery (T1580)

Severity

Informational

Description

Enumeration of S3 buckets, suggesting potential cloud storage reconnaissance.

Attacker's Goals

  • Discover available S3 buckets in the environment.
  • Enumerate objects within buckets to determine the type and structure of stored data.
  • Evaluate public access configurations of buckets to identify potential exposure or misconfigurations.

Investigative actions

  • Identify the identity performing the calls and determine if this behavior aligns with their typical access patterns.
  • Check access control policies and public access settings on the enumerated buckets for misconfigurations or unauthorized access attempts.