AWS GuardDuty CreateIPSet Trusted IP Set Changes (CloudTrail)

Alerts on CloudTrail GuardDuty CreateIPSet events that add or update trusted IP address sets.

FreeReviewedSigma · High · v5

Product: aws
Service: cloudtrail
Author: faloker (SigmaHQ), DRL 1.1
Published: 2020-02-11
Updated: 2026-07-31

ATT&CK techniques

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule flags CloudTrail events where GuardDuty creates an IP set, which can be used to manage trusted or ignored IP addresses. Attackers may attempt to weaken defensive coverage by altering which sources are considered trustworthy. The detection relies on CloudTrail telemetry matching eventSource guardduty.amazonaws.com and eventName CreateIPSet.

Reporting behind it

Related detections9 linkedT1685 — drag to rearrange

Malicious Microsoft Defender Disabled via Registry DisableAntiSpyware (via process_creation)

Suspicious Termination of Defender Tray Process via Taskkill

Malicious Windows Defender Disablement via MpCmdRun RemoveDefinitions

Malicious Unsigned VIB Installation on ESXi Host via esxcli (via process_creation)

Suspicious In-Memory PowerShell Execution from Web Server via Automation Assembly (via image_load)

Malicious EDR Evasion Driver Load from AnyDesk Directory via k.sys (via image_load)

Malicious Zemana Vulnerable Driver Load for EDR Termination (via image_load)

Suspicious EDRKillShifter Vulnerable Driver Load from User Temp Directory (via image_load)

Malicious AuKill EDR Killer Kernel Driver Load via Process Explorer Driver (via image_load)

AWS GuardDuty CreateIPSet Trusted IP Set Changes (CloudTrail)

Pivot detection · T1685 · 9 related

Changelog

v5
Candidate ingested via manual entry.2026-07-31
v4
Candidate ingested via manual entry.2026-07-31
v3
Candidate ingested via manual entry.2026-07-31
v2
Candidate ingested via manual entry.2026-07-31
v1
No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

aws-cloudtrail-guardduty-trusted-ip-set-updates-via-createipset-6e61ee20

title: AWS GuardDuty CreateIPSet Trusted IP Set Changes (CloudTrail)
id: ae46d5c9-f0ca-48b8-8478-e6185dafbc7b
status: test
description: This rule flags CloudTrail events where GuardDuty creates an IP set, which can be used to manage trusted or ignored IP addresses. Attackers may attempt to weaken defensive coverage by altering which sources are considered trustworthy. The detection relies on CloudTrail telemetry matching eventSource guardduty.amazonaws.com and eventName CreateIPSet.
references:
  - https://github.com/RhinoSecurityLabs/pacu/blob/866376cd711666c775bbfcde0524c817f2c5b181/pacu/modules/guardduty__whitelist_ip/main.py#L9
  - https://github.com/SigmaHQ/sigma/blob/master/rules/cloud/aws/cloudtrail/aws_guardduty_disruption.yml
author: faloker, Huntrule Team
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
license: DRL-1.1
related:
  - id: 6e61ee20-ce00-4f8d-8aee-bedd8216f7e3
    type: derived

Convert

This rule as a query you can run. Uses no unlock credit.

SplunkSPL