AWS RDS Snapshot Restored

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Identifies when an attempt was made to restored RDS Snapshot. Snapshots are sometimes shared by threat actors in order to exfiltrate bulk data. If the permissions were modified, verify if the snapshot was shared with an unauthorized or unexpected AWS account.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-aws*

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-6m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Cloud
  • AWS
  • Continuous Monitoring
  • SecOps
  • Asset Visibility

Version: 1

Added (Elastic Stack release): 7.16.0

Rule authors: Austin Songer

Rule license: Elastic License v2

Potential false positives

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Restoring snapshots may be done by a system or network administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Snapshot restoration from unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Investigation guide

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## Config

The AWS Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

Rule query

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event.dataset:aws.cloudtrail and event.provider:rds.amazonaws.com and
event.action:RestoreDBInstanceFromDBSnapshot and event.outcome:success

Threat mapping

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Framework: MITRE ATT&CKTM