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AWS Backup Resource Enumeration via Long-Term Access Key

Detects enumeration of AWS Backup resources using long-term IAM access keys (AKIA* prefix). AWS Backup protects EC2 instances, EBS volumes, RDS databases, DynamoDB tables, EFS file systems, and S3 buckets. An…

Description

Detects enumeration of AWS Backup resources using long-term IAM access keys (AKIA* prefix). AWS Backup protects EC2 instances, EBS volumes, RDS databases, DynamoDB tables, EFS file systems, and S3 buckets. An adversary who obtains long-term access keys may enumerate backup vaults, backup plans, and protected resources as a precursor to ransomware. Identifying which resources have recent backups (indicating high-value data) and what vault access policies can be modified to delete or corrupt the backups before encrypting the primary data.

Detection logic

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Detection requirements

Platform
IaaSIdentity ProviderOffice SuiteSaaS

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

Log source category
event_index

Known benign triggers

  • Automated monitoring tools or compliance audit scripts using long-term IAM keys to inventory backup coverage will trigger this rule. Migrate automation to IAM roles with short-lived credentials. Long-term key usage for backup management is a security anti-pattern.

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