Microsoft security experts Archives | Microsoft Security Blog

A group of people standing on a floor of a building lobby discussing

May 21, 2025
15 min read

Lumma Stealer: Breaking down the delivery techniques and capabilities of a prolific infostealer

Over the past year, Microsoft Threat Intelligence observed the persistent growth and operational sophistication of Lumma Stealer, an info-stealing malware used by multiple financially motivated threat actors to target various industries.

April 15, 2025
10 min read

Threat actors misuse Node.js to deliver malware and other malicious payloads

Since October 2024, Microsoft Defender Experts has observed and helped multiple customers address campaigns leveraging Node.

Person sitting on a couch using a laptop.

March 17, 2025
13 min read

StilachiRAT analysis: From system reconnaissance to cryptocurrency theft

Microsoft Incident Response uncovered a novel remote access trojan (RAT) named StilachiRAT, which demonstrates sophisticated techniques to evade detection, persist in the target environment, and exfiltrate sensitive data.

Photo of a man holding a tablet and luggage with blue hexagons and the icon for Storm threat actors

March 13, 2025
10 min read

Phishing campaign impersonates Booking.com, delivers a suite of credential-stealing malware

Microsoft Threat Intelligence identified a phishing campaign that impersonates online travel agency Booking.

A man wearing glasses and headphones looking at a computer screen

March 6, 2025
32 min read

Malvertising campaign leads to info stealers hosted on GitHub

Microsoft detected a large-scale malvertising campaign in early December 2024 that impacted nearly one million devices globally.

Computer programmer working at night in office.

February 10, 2025
4 min read

Build a stronger security strategy with proactive and reactive incident response: Cyberattack Series

Find out how a cyberattack by Storm-2077 was halted faster because the Microsoft Incident Response team is both proactive and reactive at the same time.

Microsoft Cyber Defense Operations Center.

January 6, 2025
7 min read

Why security teams rely on Microsoft Defender Experts for XDR for managed detection and response

Microsoft Defender Experts for XDR is a mature and proven service that triages, investigates, and responds to incidents and hunts for threats on a customer’s behalf around the clock.

October 8, 2024
9 min read

File hosting services misused for identity phishing

Since mid-April 2024, Microsoft has observed an increase in defense evasion tactics used in campaigns abusing file hosting services like SharePoint, OneDrive, and Dropbox.

A group of security practitioners work at their computers.

September 25, 2024
5 min read

Microsoft is named a Leader in the 2024 Gartner® Magic Quadrant™ for Endpoint Protection Platforms

Gartner® names Microsoft a Leader in Endpoint Protection Platforms—a reflection, we believe, of our continued progress in helping organizations protect their endpoints against even the most sophisticated attacks, while driving continued efficiency for security operations center teams.

Chief information security officer presents to the board of executives on security topics.

August 28, 2024
7 min read

The art and science behind Microsoft threat hunting: Part 3

In this blog post, read how Microsoft Incident Response leverages three types of threat intelligence to enhance incident response scenarios.

Portrait of a chief information security officer.

June 25, 2024
7 min read

How to boost your incident response readiness

Discover key steps to bolster incident response readiness, from disaster recovery plans to secure deployments, guided by insights from the Microsoft Incident Response team.

Real people. IT professionals. Full service IT consulting firm harnesses ever-changing technology to solve complex business challenges. They specialize in digital transformation and cloud-based systems, and assist business and technical decision makers in creating, installing, and maintaining custom solutions for their growing needs.

June 18, 2024
4 min read

Microsoft Defender Experts for XDR recognized in the latest MITRE Engenuity ATT&CK® Evaluation for Managed Services

Microsoft Defender Experts for XDR delivered excellent results during round 2 of the MITRE Engenuity ATT&CK® Evaluations for Managed Services menuPass + ALPHV BlackCat.

Microsoft security experts

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