---
id: 7856
title: "Enumerating Users on z/OS with LISTUSER"
source_domain: netspi.com
source_url: "https://www.netspi.com/blog/technical-blog/mainframe-penetration-testing/enumerating-users-on-z-os-with-listuser/"
published_at: "2023-10-12T00:00:00Z"
tags: ["red-team", "user-enumeration", "mainframe", "zos", "racf", "password-spray"]
phying_url: "https://phying.com/item/7856"
lang: en
---

# Enumerating Users on z/OS with LISTUSER

## Summary

Abusing the RACF LISTUSER command on z/OS lets adversaries enumerate all user profiles and identify administrative accounts, enabling targeted password sprays and attacks on mainframes.

## Intelligence Metadata

- **Sources:** netspi.com
- **Published:** 2023-10-12T00:00:00Z
- **Original:** https://www.netspi.com/blog/technical-blog/mainframe-penetration-testing/enumerating-users-on-z-os-with-listuser/
- **Phying News:** https://phying.com/item/7856