Undermining the trust boundary: Investigating a stealthy intrusion through third-party compromise

In this article 1. Abuse of trusted relationships as an attack delivery mechanism 2. Methods, tools, and access strategies 3. Campaign conclusion 4. Microsoft Defender detection and hunting guidance In recent years, many sophisticated intrusions have increasingly avoided using noisy exploits,...

Guidance for detecting, investigating, and defending against the Trivy supply chain compromise

In this article 1. Analyzing the Trivy supply chain compromise 2. Detection and investigation 3. Mitigation and protection guidance 4. Advanced hunting queries 5. References 6. Learn more On March 19, 2026, Trivy, Aqua Security’s widely used open-source vulnerability scanner, was reported to have...

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

In this article 1. A wide range of tax-themed campaigns 2. How to protect users and organization against tax-themed campaigns 3. Microsoft Defender detection and hunting guidance 4. Indicators of compromise During tax season, threat actors reliably take advantage of the urgency and familiarity of...