Add An Iam User (aws)

Platform	Author	Last Update
aws	Nick Jones	2024-12-02

An attacker may attempt to create an IAM user, in order to provide another means of authenticating to the AWS account

MITRE IDs

• T1136.003

Required Permissions

• iam:CreateUser

Required Parameters

Name	Type	Description	Example Value
user	str	IAM user to create	example-user

Attacker Action

aws iam create-user --user-name example-user

Detection Case

ELK query

When logs are ingested into ELK, the following Lucene query can be used to identify relevant events.

eventName:CreateUser AND eventSource:iam.amazonaws.com

Sigma Definition

---
title: Add an IAM User
id: 6f660a21-0fcd-4b51-9894-4d2d8213f45b
status: experimental
author: Nick Jones
date: 2024-12-02
description: An attacker may attempt to create an IAM user, in order to provide another means of authenticating to the AWS account
logsource:
  service: cloudtrail
detection:
  selection_source:
    - eventSource: "iam.amazonaws.com"
  events:
    - eventName: "CreateUser"
  condition: selection_source and events
level: low
tags:
  - attack.T1136.003


falsepositives:
  - Developers making legitimate changes to the environment. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.