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 Route Table Modified or Deleted

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AWS Route Table Modified or Deleted

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Identifies when an AWS Route Table has been modified or deleted.

Rule type: query

Rule indices:

filebeat-*
logs-aws*

Severity: low

Risk score: 21

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
Network Security
Persistence

Version: 100 (version history)

Added (Elastic Stack release): 7.16.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic, Austin Songer

Rule license: Elastic License v2

Potential false positives

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Route Table could be modified or deleted by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Route Table being modified from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule. Also automated processes that use Terraform may lead to false positives.

Investigation guide

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Rule query

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event.dataset:aws.cloudtrail and
event.provider:cloudtrail.amazonaws.com and event.action:(ReplaceRoute
or ReplaceRouteTableAssociation or DeleteRouteTable or DeleteRoute or
DisassociateRouteTable) and event.outcome:success