---
id: 7730
title: "We Know What You Did (in Azure) Last Summer"
source_domain: netspi.com
source_url: "https://www.netspi.com/blog/technical-blog/cloud-pentesting/azure-resource-attribution-via-tenant-id-enumeration/"
published_at: "2025-08-13T00:00:00Z"
tags: ["cloud", "osint", "entra-id", "azure", "enumeration", "def-con-33", "tenant-id"]
phying_url: "https://phying.com/item/7730"
lang: en
---

# We Know What You Did (in Azure) Last Summer

## Summary

NetSPI's DEF CON 33 talk shows how Azure resources supporting Entra ID authentication expose tenant IDs, letting attackers map cloud resources back to specific organizations at scale.

## Intelligence Metadata

- **Sources:** netspi.com
- **Published:** 2025-08-13T00:00:00Z
- **Original:** https://www.netspi.com/blog/technical-blog/cloud-pentesting/azure-resource-attribution-via-tenant-id-enumeration/
- **Phying News:** https://phying.com/item/7730