AWS EC2 Flow Log Deletion

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Identifies the deletion of one or more flow logs in AWS Elastic Compute Cloud (EC2). An adversary may delete flow logs in an attempt to evade defenses.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-aws*

Severity: high

Risk score: 73

Runs every: 10m

Searches indices from: now-60m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Cloud
  • AWS
  • Continuous Monitoring
  • SecOps
  • Log Auditing

Version: 7

Rule authors:

  • Elastic

Rule license: Elastic License v2

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:ec2.amazonaws.com and event.action:DeleteFlowLogs and event.outcome:success

Framework: MITRE ATT&CKTM