Blog
Cloud security lessons, Zero Trust insights, and the occasional cat joke.
Entra SSPR and Passkey Readiness for Microsoft-Provided SMS/Voice Delivery Retirement
Microsoft is advancing three related parts of the Entra authentication and recovery experience between now and next March: On September 1, 2026, users enabled for SMS or voice begin moving into the Microsoft-managed passkey Registration Campaign. …
GigaWiper Detection as Code: Testing the Sentinel Repositories Preview
Microsoft published its technical analysis of GigaWiper on July 9, 2026. Microsoft describes it as a modular backdoor with destructive capabilities, including scheduled-task persistence, RabbitMQ-over-AMQP command C2, Redis status and output …
From Authorization to Action: Operationalizing CISA's Microsoft Cloud Logs Playbook in Sentinel
CISA released the Microsoft Expanded Cloud Logs Implementation Playbook on January 15, 2025. Its implementation guidance remains a practical baseline for deciding which Microsoft cloud audit signals belong in a defensible logging program. That is …
Copy Fail in the Cloud: A Defender, Sentinel, and AKS Response Guide for CVE-2026-31431
A Linux local privilege escalation bug is easy to dismiss if you only think in traditional server terms. An attacker already needs local access, so how bad can it be? In cloud environments, that assumption breaks fast. A compromised container, a …
Block Device Code Phishing in Entra Without Breaking Legit Workflows
Device code phishing is nasty because the user does not hand over a password. They hand over a session. The lure sends the victim to a legitimate Microsoft device sign-in page. The victim enters a short code. Entra ID issues tokens to the attacker’s …
Agent 365 Launch Playbook: I Tested the Defender Response for AI Agent Attacks
When I published this lab on April 20, Microsoft had announced that Agent 365 would become generally available on May 1, 2026. It reached that milestone; the launch-week security question behind the lab still matters. I wanted to answer a different …
Scan Blob Uploads, Trace Later Reads: Defender for Storage + Sentinel
Storage is where malware waits. A blob uploaded to ingest/ by a pipeline step, a partner’s SFTP connector, or a misconfigured Logic App sits quietly until something downstream opens it — a Data Factory copy, a Function app, a Synapse notebook, a …
Detecting Infostealer Session Hijacking with Microsoft Sentinel
Nearly 70% of incidents in the Americas now begin with stolen or misused accounts. Infostealers are the engine behind that number – families like Lumma, RedLine, and Vidar export browser cookies and session tokens directly from the victim’s machine, …
Investigate Hidden Privilege Paths with Microsoft Sentinel Data Federation and Custom Graphs
After a compromised service principal incident, the first triage question is always the same: “What else can this identity reach?” The answer usually lives outside Sentinel, buried in entitlement exports, RBAC snapshots, or asset inventories that …
Block Prompt Injection at the Network Layer with Microsoft Entra Prompt Injection Protection
A while back I built an LLM Firewall with AWS Lambda, a proxy that sits between users and the model to catch prompt injection. It worked, but it meant writing custom code for every app and having zero visibility into AI services I didn’t own. That’s …