Microsoft Defender
Lessons from the field. Always landing on my feet.
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 …
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 …
AKS Runtime Security: Binary Drift, Anti-Malware & Gated Deployment with Defender for Cloud
In December, I published a post on securing the container supply chain — SBOM generation, image signing, and build provenance with GitHub Actions. That covered build-time security: making sure the image you ship is the image you built. But what …