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 Security Group Configuration Change Detection

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AWS Security Group Configuration Change Detection

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Identifies a change to an AWS Security Group Configuration. A security group is like a virtul firewall and modifying configurations may allow unauthorized access. Threat actors may abuse this to establish persistence, exfiltrate data, or pivot in a AWS environment.

Rule type: query

Rule indices:

filebeat-*
logs-aws*

Severity: low

Risk score: 21

Runs every: 10m

Searches indices from: now-30m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/ec2-security-groups.html

Tags:

Elastic
Cloud
AWS
Continuous Monitoring
SecOps
Network Security

Version: 1

Rule authors:

Elastic
Austin Songer

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:iam.amazonaws.com and event.action:(AuthorizeSecurityGroupEgress or
CreateSecurityGroup or ModifyInstanceAttribute or ModifySecurityGroupRules or RevokeSecurityGroupEgress or
RevokeSecurityGroupIngress) and event.outcome:success

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/

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