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Enumerate IAM users

Author Last Update
Nick Jones 2020-06-18

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

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: 2020-06-18
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.t1089