AWS CloudWatch Log Stream Deletion

edit

Identifies the deletion of an AWS CloudWatch log stream, which permanently deletes all associated archived log events with the stream.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-aws*

Severity: medium

Risk score: 47

Runs every: 10 minutes

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: 6 (version history)

Added (Elastic Stack release): 7.9.0

Last modified (Elastic Stack release): 7.13.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positives

edit

A log stream may be deleted by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Log stream deletions from unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Investigation guide

edit
## Config

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

Rule query

edit
event.dataset:aws.cloudtrail and event.provider:logs.amazonaws.com and
event.action:DeleteLogStream and event.outcome:success

Threat mapping

edit

Framework: MITRE ATT&CKTM

Rule version history

edit
Version 6 (7.13.0 release)
  • Updated query, changed from:

    event.action:DeleteLogStream and event.dataset:aws.cloudtrail and
    event.provider:logs.amazonaws.com and event.outcome:success
Version 5 (7.12.0 release)
  • Formatting only
Version 4 (7.11.2 release)
  • Formatting only
Version 3 (7.11.0 release)
  • Formatting only
Version 2 (7.10.0 release)
  • Formatting only