AWS Security Group Configuration Change Detection

Elastic Stack Serverless Security

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

Rule type: query

Rule indices:

• filebeat-*
• logs-aws*

Severity: low

Risk score: 21

Runs every: 10m

Searches indices from: now-30m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[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: 2

Rule authors:

• Elastic
• Austin Songer

Rule license: Elastic License v2

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

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&CKTM

• 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/

• Technique:

  • Name: Impair Defenses
  • ID: T1562
  • Reference URL: https://attack.mitre.org/techniques/T1562/

• Sub-technique:

  • Name: Disable or Modify Cloud Firewall
  • ID: T1562.007
  • Reference URL: https://attack.mitre.org/techniques/T1562/007/