April 17, 2026

Dissecting Sapphire Sleet’s macOS intrusion from lure to compromise

In this article Sapphire Sleet’s campaign lifecycle Defending against Sapphire Sleet intrusion activity Microsoft Defender detection and hunting guidance Indicators of compromise Executive summary Microsoft Threat […]
April 7, 2026

Inside an AI‑enabled device code phishing campaign

In this article Attack chain overview Mitigation and protection guidance Indicators of compromise (IOC) References Learn more Microsoft Defender Security Research has observed a widespread phishing […]
March 20, 2026

When tax season becomes cyberattack season: Phishing and malware campaigns using tax-related lures

In this article A wide range of tax-themed campaigns How to protect users and organization against tax-themed campaigns Microsoft Defender detection and hunting guidance Indicators of […]