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. Attackers used this cloud-based infrastructure to compromise mailboxes via phishing and add forwarding rules, enabling these attackers to...

Discover and manage shadow IT with Microsoft 365

While IT teams methodically plan corporate adoption of cloud services, the rest of us have dived in headfirst. Ten years ago, a vendor shared a video file with me via Dropbox because it was too big to email. It was my first experience with a cloud file sharing service, and when I realized I could...

4 tried-and-true prevention strategies for enterprise-level security

Why is it that dentists advise people over and over to floss, yet so few do it? It only takes a minute of your time, yet if you’re running late or feeling tired, you may be tempted to skip it. That is until you remember your upcoming teeth cleaning appointment. There is nothing like the memory of...

Best practices for securely moving workloads to Microsoft Azure

Azure is Microsofts cloud computing environment. It offers customers three primary service delivery models including infrastructure as a service IaaS, platform as a service PaaS, and software as a service SaaS. Adopting cloud technologies requires a shared responsibility model for security, with...

Nation-state threat actor Mint Sandstorm refines tradecraft to attack high-value targets

Over the past several months, Microsoft has observed a mature subgroup of Mint Sandstorm, an Iranian nation-state actor previously tracked as PHOSPHORUS, refining its tactics, techniques, and procedures TTPs. Specifically, this subset has rapidly weaponized N-day vulnerabilities in common...

DEV-0832 (Vice Society) opportunistic ransomware campaigns impacting US education sector

In recent months, Microsoft has detected active ransomware and extortion campaigns impacting the global education sector, particularly in the US, by a threat actor we track as DEV-0832, also known as Vice Society. Shifting ransomware payloads over time from BlackCat, QuantumLocker, and Zeppelin,...

North Korean threat actor targets small and midsize businesses with H0lyGh0st ransomware

A group of actors originating from North Korea that Microsoft Threat Intelligence Center MSTIC tracks as DEV-0530 has been developing and using ransomware in attacks since June 2021. This group, which calls itself H0lyGh0st, utilizes a ransomware payload with the same name for its campaigns and h...

Encouraging women to embrace their cybersecurity superpowers

The cybersecurity challenges of today require a diversity of skills, perspectives, and experiences, yet women remain underrepresented in this field. On International Women’s Day, some Microsoft Security women leaders penned a powerful blog highlighting the underrepresentation of women in...

How purple teams can embrace hacker culture to improve security

The security community is continuously changing, growing, and learning from each other to better position the world against cyber threats. In the latest Voice of the Community blog series post, Microsoft Product Marketing Manager Natalia Godyla talks with Matthew Hickey, co-founder, CEO, and writ...

Microsoft acquires ReFirm Labs to enhance IoT security

Modern computing devices can be thought of as a collection of discrete microprocessors each with a dedicated function like high-speed networking, graphics, Disk I/O, AI, and everything in between. The emergence of the intelligent edge has accelerated the number of these cloud-connected devices th...

Security guidance for remote desktop adoption

As the volume of remote workers quickly increased over the past two to three months, the IT teams in many companies scrambled to figure out how their infrastructures and technologies would be able to handle the increase in remote connections. Many companies were forced to enhance their capabiliti...

New privacy assessments now included in Microsoft Compliance Score

Keeping up with rapidly changing regulatory requirements has become one of the biggest challenge’s organizations face today. Just as companies finished preparing for the General Data Protection Regulation GDPR, California’s privacy regulation—California Consumer Privacy Act CCPA—went into effect ...

How to implement Multi-Factor Authentication (MFA)

Another day, another data breach. If the regular drumbeat of leaked and phished accounts hasn't persuaded you to switch to Multi-Factor Authentication MFA already, maybe the usual January rush of 'back to work' password reset requests is making you reconsider. When such an effective option for...

GALLIUM: Targeting global telecom

Microsoft Threat Intelligence Center MSTIC is raising awareness of the ongoing activity by a group we call GALLIUM, targeting telecommunication providers. When Microsoft customers have been targeted by this activity, we notified them directly with the relevant information they need to protect...

Jumpstart your Microsoft Graph Security API integration with the new JavaScript sample app

The Microsoft Graph Security API, which launched this spring, is a unified REST API for integrating data and intelligence from Microsoft products, services, and partners. Using Microsoft Graph, developers can easily build applications that consolidate and correlate security alerts from multiple...

Working towards a more diverse future in security

Last year I embarked on an exercise to examine diversity in cybersecurity. As one full year has passed, I decided to revisit this topic and the ongoing challenges of recruiting AND retaining diverse talent in the cybersecurity field. This past year saw the MeToo movement in the spotlight, and whi...

Behavior monitoring combined with machine learning spoils a massive Dofoil coin mining campaign

Update: Further analysis of this campaign points to a poisoned update for a peer-to-peer P2P application. For more information, read Poisoned peer-to-peer app kicked off Dofoil coin miner outbreak. Just before noon on March 6 PST, Windows Defender Antivirus blocked more than 80,000 instances of...

AI security risk assessment using Counterfit

Today, we are releasing Counterfit, an automation tool for security testing AI systems as an open-source project. Counterfit helps organizations conduct AI security risk assessments to ensure that the algorithms used in their businesses are robust, reliable, and trustworthy. AI systems are...

The dynamic duo: How to build a red and blue team to strengthen your cybersecurity, Part 2

The security community is continuously changing, growing, and learning from each other to better position the world against cyber threats. In the first post of our new Voice of the Community blog series, Microsoft Product Marketing Manager Natalia Godyla talks with Jake Williams, Founder of...

Using Zero Trust principles to protect against sophisticated attacks like Solorigate

The Solorigate supply chain attack has captured the focus of the world over the last month. This attack was simultaneously sophisticated and ordinary. The actor demonstrated sophistication in the breadth of tactics used to penetrate, expand across, and persist in affected infrastructure, but many...

The dynamic duo: How to build a red and blue team to strengthen your cybersecurity, Part 1

The security community is continuously changing, growing, and learning from each other to better position the world against cyber threats. In the first post of our new Voice of the Community blog series, Microsoft Product Marketing Manager Natalia Godyla talks with Jake Williams, Founder of...

Zero Trust Deployment Guide for Microsoft Azure Active Directory

Microsoft is providing a series of deployment guides for customers who have engaged in a Zero Trust security strategy. In this guide, we cover how to deploy and configure Azure Active Directory Azure AD capabilities to support your Zero Trust security strategy. For simplicity, this document will...

Full Operational Shutdown—another cybercrime case from the Microsoft Detection and Response Team

Recently, we published our first case report 001: …And Then There Were Six by the Microsoft Detection and Response Team DART. We received significant positive response from our customers and colleagues and our team has been getting inquiries asking for more reports. We are glad to share the DART...

Zero Trust framework to enable remote work

Zero Trust Assessment tool now live! With such a large influx of employees working remotely, many of the traditional network-based security controls are unable to protect the organization. For many organizations, there are two options: route all remote traffic through a strained legacy network...

Microsoft announces new innovations in security, compliance, and identity at Ignite

Today, at the Microsoft Ignite Conference, we’re announcing new innovations designed to help customers across their security, compliance, and identity needs. With so much going on at Ignite this week, I want to highlight the top 10 announcements: 1. Azure Sentinel—We’re introducing new connectors...

Delivering major enhancements in Windows Defender Application Control with the Windows 10 May 2019 Update

With the Windows 10 May 2019 Update we delivered several important features for Windows Defender Application Control WDAC, which was originally introduced to Windows as part of a scenario called Device Guard. WDAC works in conjunction with features like Windows Defender Application Guard, which...

4 best practices to help you integrate security into DevOps

Microsoft’s transition of its corporate resources to the cloud required us to rethink how we integrate security into the agile development environment. In the old process, we often worked on 6- to 12-month development cycles for internal products. The security operations team was separate from th...

From the ground up to the cloud: Microsoft’s Intelligent Security supporting CISOs’ cloud transformation

Its no secret that Microsoft has embraced the cloud in a big wayfrom enterprise solutions like Microsoft Azure to Office 365 and Windows. But a recent research report by Forrester focuses on an equally important shift in our approach to securityintegrating workforce and cloud security in ways tha...

Adding transparency and context into industry AV test results

Corporate Vice President Brad Anderson recently shared his insights on how Windows Defender Advanced Threat Protection Windows Defender ATP evolved to achieve important quality milestones. Our Windows Defender ATP team is committed to delivering industry-leading protection, customer choice, and...

Security baselines should underpin efforts to manage cybersecurity risk across sectors

This post is authored byAngela McKay, Director of Cybersecurity Policy and Amanda Craig, Senior Cybersecurity Strategist, CELA. Organizations are leveraging technology to transform their operations, products, and services, and governments are increasingly focusing on how to enable such dynamic...

Accelerate your security deployment with FastTrack for Microsoft 365

This blog is part of a series that responds to common questions we receive from customers about Microsoft 365 Security and Enterprise Mobility + Security. In this series youll find context, answers, and guidance for deployment and driving adoption within your organization. Inpart one of this...

Poisoned peer-to-peer app kicked off Dofoil coin miner outbreak

On March 7, we reported that a massive Dofoil campaign attempted to install malicious cryptocurrency miners on hundreds of thousands of computers. Windows Defender Antivirus, with its behavior monitoring, machine learning technologies, and layered approach to security detected and blocked the...

Securing IoT devices against attacks that target critical infrastructure

South Staffordshire PLC, a company that supplies water to over one million customers in the United Kingdom, notified its customers in August of being a target of a criminal cyberattack. This incident highlights the sophisticated threats that critical industries face today. According to South...

Securing our approach to domain fronting within Azure

Every single day our teams analyze the trillions of signals we see to understand attack vectors, and then take those learnings and apply them to our products and solutions. Having that understanding of the threat landscape is key to ensuring our customers are kept safe every day. However, being a...

System Management Mode deep dive: How SMM isolation hardens the platform

Ensuring that the platform firmware is healthy and trustworthy is fundamental to guaranteeing that powerful platform security features like Hypervisor-protected code integrity HVCI and Windows Defender Credential Guard are functioning as expected. Windows 10 achieves this by leveraging a...

CISO Stressbusters: Post #2: 4 tips for getting the first 6 months right as a new CISO

In your first six months in a new Chief Information Security Officer CISO role, you will often be tasked with building a security program. For some of us this is the most exciting part of the job, but it can also be stressful. You’re probably working under a deadline. Plus, it can be difficult to...

Improve cyber supply chain risk management with Microsoft Azure

For years, Microsoft has tracked threat actors exploiting federal cyber supply chain vulnerabilities. Supply chain attacks target software developers, systems integrators, and technology companies. Tactics often include obtaining source code, build processes, or update mechanisms to compromise...

How Axonius integrates with Microsoft to help customers solve the cybersecurity asset management challenge

Despite the amazing and futuristic progression of technologies in cybersecurity, it's still incredibly hard to answer the most basic of questions like: how many assets do I have, and do they adhere to my security policy? Somewhere along the line, asset management became very mundane compared to t...

Uncovering a macOS App Sandbox escape vulnerability: A deep dive into CVE-2022-26706

Microsoft uncovered a vulnerability in macOS that could allow specially crafted codes to escape the App Sandbox and run unrestricted on the system. We shared these findings with Apple through Coordinated Vulnerability Disclosure CVD via Microsoft Security Vulnerability Research MSVR in October...

DEV-0537 criminal actor targeting organizations for data exfiltration and destruction

March 24, 2022 update - As Microsoft continues to track DEV-0537’s activities, tactics, and tools, were sharing new detection, hunting, and mitigation information to give you additional insights on remaining vigilant against these attacks. In recent weeks, Microsoft Security teams have been...

Cybersecurity’s next fight: How to protect employees from online harassment

The security community is continuously changing, growing, and learning from each other to better position the world against cyber threats. In the latest Voice of the Community blog series post, Microsoft Product Marketing Manager Natalia Godyla talks with Leigh Honeywell, CEO and Co-founder of Ta...

Strategies, tools, and frameworks for building an effective threat intelligence team

How to think about building a threat intelligence program The security community is continuously changing, growing, and learning from each other to better position the world against cyber threats. In the latest Voice of the Community blog series post, Microsoft Product Marketing Manager Natalia...

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

In part three of this blog series on aligning security with business objectives and risk, we explored what it takes for security leaders to shift from looking at their mission as purely defending against technical attacks, to one that focuses on protecting valuable business assets, data, and...

Investigating a unique “form” of email delivery for IcedID malware

Microsoft threat analysts have been tracking activity where contact forms published on websites are abused to deliver malicious links to enterprises using emails with fake legal threats. The emails instruct recipients to click a link to review supposed evidence behind their allegations, but are...

Zero Trust: 7 adoption strategies from security leaders

Microsoft considers Zero Trust an essential component of any organization’s security plan. We have partnered with Cloud Security Alliance, a not-for-profit organization that promotes cloud computing best practices, to bring together executive security leaders to discuss and share insights about...

How companies can prepare for a heightened threat environment

With high levels of political unrest in various parts of the world, it’s no surprise we’re also in a period of increased cyber threats. In the past, a company’s name, political affiliations, or religious affiliations might push the risk needle higher. However, in the current environment any compa...

Data science for cybersecurity: A probabilistic time series model for detecting RDP inbound brute force attacks

Computers with Windows Remote Desktop Protocol RDP exposed to the internet are an attractive target for adversaries because they present a simple and effective way to gain access to a network. Brute forcing RDP, a secure network communications protocol that provides remote access over port 3389,...

IoT security will set innovation free: Azure Sphere general availability scheduled for February 2020

Today, at the IoT Solutions World Congress, we announced that Azure Sphere will be generally available in February of 2020. General availability will mark our readiness to fulfill our security promise at scale, and to put the power of Microsoft’s expertise to work for our customers every day—by...

Microsoft and partners design new device security requirements to protect against targeted firmware attacks

Recent developments in security research and real-world attacks demonstrate that as more protections are proactively built into the OS and in connected services, attackers are looking for other avenues of exploitation with firmware emerging as a top target. In the last three years alone, NIST’s...

Building on experience: a framework for cybersecurity policy

Each year, more and more governments are developing policies to address security challenges presented by an increasingly digitized world. And to support those efforts, Im excited today to announce the release of Microsofts new Cybersecurity Policy Framework, a resource for policymakers that...