AWS RDS Master Password Change — Sigma Rule

Rule metadata and linked tags

Author: faloker. Source status: test; severity: medium. Source dates: 2020-02-12 / 2022-10-05.

{
  "product": "aws",
  "service": "cloudtrail"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 0656eb07363653f62eaa948f420ddf7c0ec9d6922cda37c5e2cceda832bdb102

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: AWS RDS Master Password Change
id: 8a63cdd4-6207-414a-85bc-7e032bd3c1a2
status: test
description: Detects the change of database master password. It may be a part of data exfiltration.
references:
    - https://github.com/RhinoSecurityLabs/pacu/blob/866376cd711666c775bbfcde0524c817f2c5b181/pacu/modules/rds__explore_snapshots/main.py
author: faloker
date: 2020-02-12
modified: 2022-10-05
tags:
    - attack.exfiltration
    - attack.t1020
logsource:
    product: aws
    service: cloudtrail
detection:
    selection_source:
        eventSource: rds.amazonaws.com
        responseElements.pendingModifiedValues.masterUserPassword|contains: '*'
        eventName: ModifyDBInstance
    condition: selection_source
falsepositives:
    - Benign changes to a db instance
level: medium

Original YAML and metadata in JSON

False positives

• Benign changes to a db instance

Source references

• https://github.com/RhinoSecurityLabs/pacu/blob/866376cd711666c775bbfcde0524c817f2c5b181/pacu/modules/rds__explore_snapshots/main.py