sigmamediumHunting

RDS Database Security Group Modification

Detects changes to the security group entries for RDS databases. This can indicate that a misconfiguration has occurred which potentially exposes the database to the public internet, a wider audience within the VPC or that removal of valid rules has occurred which could impact the availability of the database to legitimate services and users.

MITRE ATT&CK

T1190

initial-access

Detection Query

selection:
  eventSource: rds.amazonaws.com
  eventName:
    - AuthorizeDBSecurityGroupIngress
    - CreateDBSecurityGroup
    - DeleteDBSecurityGroup
    - RevokeDBSecurityGroupIngress
condition: selection

Author

jamesc-grafana

Created

2024-07-11

Data Sources

awscloudtrail

Platforms

aws

References

https://www.gorillastack.com/blog/real-time-events/important-aws-cloudtrail-security-events-tracking/

Tags

attack.initial-accessattack.t1190

Raw Content

title: RDS Database Security Group Modification
id: 14f3f1c8-02d5-43a2-a191-91ffb52d3015
status: test
description: |
    Detects changes to the security group entries for RDS databases.
    This can indicate that a misconfiguration has occurred which potentially exposes the database to the public internet, a wider audience within the VPC or that removal of valid rules has occurred which could impact the availability of the database to legitimate services and users.
references:
    - https://www.gorillastack.com/blog/real-time-events/important-aws-cloudtrail-security-events-tracking/
author: jamesc-grafana
date: 2024-07-11
tags:
    - attack.initial-access
    - attack.t1190
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: 'rds.amazonaws.com'
        eventName:
            - 'AuthorizeDBSecurityGroupIngress'
            - 'CreateDBSecurityGroup'
            - 'DeleteDBSecurityGroup'
            - 'RevokeDBSecurityGroupIngress'
    condition: selection
falsepositives:
    - Creation of a new Database that needs new security group rules
level: medium