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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Elastic Docs ›Elastic Security Solution [7.16] ›Detections and alerts ›Prebuilt rule reference

AWS EC2 Encryption Disabled

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AWS EC2 Encryption Disabled

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Identifies disabling of Amazon Elastic Block Store (EBS) encryption by default in the current region. Disabling encryption by default does not change the encryption status of your existing volumes.

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
  • Data Protection

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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Disabling encryption 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. Disabling encryption by 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:ec2.amazonaws.com and
event.action:DisableEbsEncryptionByDefault and event.outcome:success

Threat mapping

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Framework: MITRE ATT&CKTM

Rule version history

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Version 6 (7.13.0 release)

  • Updated query, changed from:

    event.action:DisableEbsEncryptionByDefault and
event.dataset:aws.cloudtrail and event.provider:ec2.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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