IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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AWS CloudWatch Log Stream Deletion

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AWS CloudWatch Log Stream Deletion

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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

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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

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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:logs.amazonaws.com and
event.action:DeleteLogStream and event.outcome:success

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Impact
- ID: TA0040
- Reference URL: https://attack.mitre.org/tactics/TA0040/
Technique:
- Name: Data Destruction
- ID: T1485
- Reference URL: https://attack.mitre.org/techniques/T1485/
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Impair Defenses
- ID: T1562
- Reference URL: https://attack.mitre.org/techniques/T1562/

Rule version history

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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

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