Detection rules › Sigma
AWS GuardDuty Important Change
Detects updates of the GuardDuty list of trusted IPs, perhaps to disable security alerts against malicious IPs.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Defense Impairment | T1685 Disable or Modify Tools |
Event coverage
| Provider | Event |
|---|---|
| AWS-guardduty | CreateIPSet |
Rules detecting the same action
Other rules on this platform that filter on the same API call or operation.
- AWS Trusted IPSet Modified (Panther)
Rule body yaml
title: AWS GuardDuty Important Change
id: 6e61ee20-ce00-4f8d-8aee-bedd8216f7e3
status: test
description: Detects updates of the GuardDuty list of trusted IPs, perhaps to disable security alerts against malicious IPs.
references:
- https://github.com/RhinoSecurityLabs/pacu/blob/866376cd711666c775bbfcde0524c817f2c5b181/pacu/modules/guardduty__whitelist_ip/main.py#L9
author: faloker
date: 2020-02-11
modified: 2022-10-09
tags:
- attack.defense-impairment
- attack.t1685
logsource:
product: aws
service: cloudtrail
detection:
selection_source:
eventSource: guardduty.amazonaws.com
eventName: CreateIPSet
condition: selection_source
falsepositives:
- Valid change in the GuardDuty (e.g. to ignore internal scanners)
level: high
Stages and Predicates
Stage 0: condition
selection_sourceStage 1: selection_source
selection_source:
eventSource: guardduty.amazonaws.com
eventName: CreateIPSet
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
eventName | eq |
|
eventSource | eq |
|