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Leonidas Documentation

Enumerate Iam Users (aws)

PlatformAuthorLast Update
awsNick Jones2024-12-02

An adversary may attempt to enumerate the configured IAM users within an account, to identify entities that they might wish to gain access to or backdoor.

MITRE IDs

Required Permissions

  • iam:ListUsers

Required Parameters

None

Attacker Action

Terminal window
aws iam list-users

Detection Case

ELK query

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

eventName:ListUsers AND eventSource:*.iam.amazonaws.com

Sigma Definition

---
title: Enumerate IAM users
id: 329a2783-4410-47b2-a113-36200ab1037a
status: experimental
author: Nick Jones
date: 2024-12-02
description: An adversary may attempt to enumerate the configured IAM users within an account, to identify entities that they might wish to gain access to or backdoor.
logsource:
  service: cloudtrail
detection:
  selection_source:
    - eventSource: "*.iam.amazonaws.com"
  events:
    - eventName: "ListUsers"
  condition: selection_source and events
level: low
tags:
  - attack.T1033




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.