Cybersecurity

Explore Microsoft’s approach to security through law, threat analysis, policy and diplomacy.

Cybersecurity

Explore Microsoft’s approach to security through law, threat analysis, policy and diplomacy.

Microsoft Digital Defense Report 2025

Discover the scale of cyber threats and the strategies
to defend against them

Explore our annual report
Read “5 things threat analysts wish you knew”

Microsoft Digital Defense Report 2025

Discover the scale of cyber threats and the strategies 
to defend against them

Explore our annual report
Read “5 things threat analysts wish you knew”
An illustration of silhouetted investigators shining flashlights toward an underground maze where raccoons sit among Bitcoins, computer code, and login credentials.

Inside the takedown of RaccoonO365: How Phishing-as-a-Service fuels ransomware’s engine

Kevin Reifsteck, Director for Cybersecurity Policy, and Emily Violi Benjamin, Senior Program Manager, Quantum Legal and Policy

Preparing for the quantum unknown

An illustration of pedestrians walking near a business office.

Cybercrime-as-a-Service, Explained

Microsoft on the Issues: RaccoonO365 post

Microsoft’s legal action targets RaccoonO365

Blog post: post-quantum resilience

Post-quantum resilience: building secure foundations

Richard Boscovich, assistant general counsel, DCU, in conversation during a meeting.

Microsoft’s Digital Crimes Unit helps the law move at the speed of cybercrime

Illustration of government buildings and digital data graphics.

5 things you need to know about tracking today’s nation-state threats

Futuristic image of digital map interface showing Europe, Africa, and Asia with neon blue and red outlines, circular markers, and grid lines on a gradient blue-purple background, suggesting global tracking or cyber monitoring.

Disrupting Lumma Stealer

Helping the law move 
at the speed of cybercrime

Nation-state actors are much more sophisticated
and difficult to identify. They want to blend into traffic, and there are very few victims.
We had to devise new investigative techniques,
as well as adapt our legal techniques.

Richard Boscovich

Assistant General Counsel, Microsoft Digital Crimes Unit on the DCU’s unique approach to disrupting malware threats

Richard Boscovich, assistant general counsel, DCU, in conversation during a meeting.

Helping the law move
 at the speed of cybercrime

Nation-state actors are much more sophisticated
 and difficult to identify. They want to blend into traffic, and there are very few victims. We had to devise new investigative techniques,
 as well as adapt our legal techniques.

Richard Boscovich

Assistant General Counsel, Microsoft Digital Crimes Unit on the DCU’s unique approach to disrupting malware threats

Abstract world map composed of geometric shapes in blue and white tones. two yellow diagonal lines intersect across the map, with a yellow circle positioned in the upper left corner. the background is dark blue with subtle textured patterns.

The institute helping
 NGOs defend themselves

300,000 computers

In May 2017, a ransomware attack hit 300,000 computers in 150 countries in six hours

155,993 cyberattacks

The CyberPeace Institute identified 155,993 cyberattacks against nonprofits

The institute helping
 NGOs defend themselves

300,000 computers

In May 2017, a ransomware attack hit 300,000 computers in 150 countries in six hours

155,993 cyberattacks

The CyberPeace Institute identified 155,993 cyberattacks against nonprofits

Protecting democratic institutions from cyber threats

Star Blizzard’s activities underscore the importance of upholding international norms to govern responsible state behavior online. Today’s action is an example of the impact we can have against cybercrime when we work together.

Steven Masada

Assistant General Counsel, Microsoft Digital Crimes Unit on the DCU’s unique approach to disrupting malware threats

Read the blog about protecting democratic institutions from cyber threats and Microsoft’s action against Star Blizzard
Read the blog about protecting democratic institutions from cyber threats and Microsoft’s action against Star Blizzard

Protecting democratic institutions from cyber threats

Star Blizzard’s activities underscore the importance of upholding international norms to govern responsible state behavior online. Today’s action is an example of the impact we can have against cybercrime when we work together.

Steven Masada

Assistant General Counsel, Microsoft Digital Crimes Unit on the DCU’s unique approach to disrupting malware threats

Inside the high-security facility tackling digital threats

Read the 2025 Microsoft Digital Defense Report

Microsoft Digital Defense Report 2025

100 trillion security signals

Microsoft processes 100 trillion security signals daily, providing unparalleled insight into global cyber threats and helping organizations defend against increasingly sophisticated attacks

5 billion emails

5 billion emails screened daily on average to protect users from malware and phishing

Read the 2025 Microsoft Digital Defense Report

Microsoft Digital Defense Report 2025

100 trillion security signals

Microsoft processes 100 trillion security signals daily, providing unparalleled insight into global
cyber threats and helping organizations defend against increasingly sophisticated attacks

5 billion emails

5 billion emails screened daily on average to protect users from malware and phishing

Follow us