Microsoft Defender

Microsoft Defender helps prevent, detect, and respond to attacks across devices, identities, apps, email, data, workloads, and clouds. Explore threat intelligence, capabilities, and real-world guidance to help you get more out of Defender.

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Secure and verify every identity with Microsoft Entra
Microsoft Entra expands beyond identity and access management with new product categories such as cloud infrastructure entitlement management (CIEM) and decentralized identity.
Learn more
June 14, 2021

7 min read

Behind the scenes of business email compromise: Using cross-domain threat data to disrupt a large BEC campaign

Microsoft 365 Defender researchers recently uncovered and disrupted a large-scale business email compromise (BEC) infrastructure hosted in multiple web services.
May 27, 2021

11 min read

New sophisticated email-based attack from NOBELIUM

Microsoft Threat Intelligence Center (MSTIC) has uncovered a wide-scale malicious email campaign operated by NOBELIUM, the threat actor behind the attacks against SolarWinds, the SUNBURST backdoor, TEARDROP malware, GoldMax malware, and other related components.
May 26, 2021

9 min read

Becoming resilient by understanding cybersecurity risks: Part 4—navigating current threats

Learn how your infrastructure and security operations can make you vulnerable to insider threats, ransomware, weaponized AI, and more.
May 25, 2021

3 min read

Microsoft is a Leader in the 2021 Forrester Endpoint Security Software as a Service Wave

We are excited to share that Microsoft has been named a Leader in The Forrester WaveTM: Endpoint Security Software as a Service, Q2 20211, receiving one of the highest scores in the strategy category and among the top three scores in the current offering category.
Prevent threats with Microsoft Defender
The Microsoft Defender family offers comprehensive threat prevention, detection, and response capabilities for everyone—from individuals looking to protect their family to the world’s largest enterprises.
Explore products
May 20, 2021

4 min read

SimuLand: Understand adversary tradecraft and improve detection strategies

At Microsoft, we continuously collaborate with customers and the InfoSec community to learn more about the latest adversary tradecraft so that we can improve our detection strategies across all our security services.
May 18, 2021

6 min read

Mitigate OT security threats with these best practices

Chris Sistrunk, a Technical Manager in Mandiant’s ICS/OT Consulting practice, shares best practices to improve operational technology security.
May 12, 2021

8 min read

How to secure your hybrid work world with a Zero Trust approach

We are operating in the most complex cybersecurity landscape we’ve ever seen.
May 11, 2021

3 min read

Threat and Vulnerability Management now supports all major platforms

We are swiftly adapting to the lasting reality of a hybrid workforce, with the number of remote workers in the US expected to nearly double over the next five years, compared to pre-pandemic times.
Retain Microsoft Security Experts
Microsoft Security Experts are now available to strengthen your team with managed security services. Learn how to defend against threats with security experts.
Get started
May 11, 2021

3 min read

Gartner names Microsoft a Leader in the 2021 Endpoint Protection Platforms Magic Quadrant

We are so grateful to our customers who have collaborated with us in creating one of the best endpoint security solutions on the market and are thrilled that Gartner has recognized this work and the journey we’ve taken alongside our customers by naming Microsoft a Leader in the 2021 Endpoint Protection Platforms (EPP) Magic Quadrant, positioned highest on ability to execute.
May 6, 2021

2 min read

Forrester names Microsoft a Leader in the 2021 Enterprise Email Security Wave

We are proud to announce today that Microsoft is positioned as a leader in The Forrester Wave™: Enterprise Email Security, Q2 2021, receiving among the highest scores in the strategy category.
May 6, 2021

8 min read

Business email compromise campaign targets wide range of orgs with gift card scam

Read our investigation of a BEC campaign that used attacker-created email infrastructure to facilitate gift card theft targeting the consumer goods, process manufacturing and agriculture, real estate, discrete manufacturing, and professional services sectors.
May 6, 2021

5 min read

Business email compromise: How Microsoft is combating this costly threat

Business email compromise is the costliest phishing attack threat to organizations.