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Investigating and Mitigating Malicious Drivers

Friday, June 25, 2021

The security landscape continues to rapidly evolve as threat actors find new and innovative methods to gain access to environments across a wide range of vectors. As the industry moves closer to the adoption of a Zero Trust security posture with broad and layered defenses, we remain committed to sharing threat intelligence with the community to shine a light on the latest techniques and exploits of attackers so the industry can better protect itself.

New Nobelium activity

Friday, June 25, 2021

The Microsoft Threat Intelligence Center is tracking new activity from the NOBELIUM threat actor. Our investigation into the methods and tactics being used continues, but we have seen password spray and brute-force attacks and want to share some details to help our customers and communities protect themselves. This recent activity was mostly unsuccessful, and the majority of targets were not successfully compromised - we are aware of three compromised entities to date.

“BadAlloc” – Memory allocation vulnerabilities could affect wide range of IoT and OT devices in industrial, medical, and enterprise networks

Thursday, April 29, 2021

Microsoft’s Section 52, the Azure Defender for IoT security research group, recently uncovered a series of critical memory allocation vulnerabilities in IoT and OT devices that adversaries could exploit to bypass security controls in order to execute malicious code or cause a system crash. These remote code execution (RCE) vulnerabilities cover more than 25 CVEs and potentially affect a wide range of domains, from consumer and medical IoT to Industrial IoT, Operational Technology (OT), and industrial control systems.

April 2021 Update Tuesday packages now available

Tuesday, April 13, 2021

Update August 25, 2021: Microsoft strongly recommends that you update your servers with the most recent security updates available. CVE-2021-34473 (ProxyShell) CVE-2021-34523 (ProxyShell) CVE-2021-33766 Today is Update Tuesday – our commitment to provide a predictable monthly schedule to release updates and provide the latest protection to our customers. Update Tuesday is a monthly cycle when Microsoft releases patches for vulnerabilities that we have found proactively or that have been disclosed to us through our security partnerships under a coordinated vulnerability disclosure.

Introducing Bounty Awards for Teams Desktop Client Security Research

Wednesday, March 24, 2021

Partnering with the security research community is an important part of Microsoft’s holistic approach to defending against security threats. As much of the world has shifted to working from home in the last year, Microsoft Teams has enabled people to stay connected, organized, and collaborate remotely. Microsoft and security researchers across the planet continue to partner to help secure customers and the technologies we use for remote collaboration.

Guidance for responders: Investigating and remediating on-premises Exchange Server vulnerabilities

Tuesday, March 16, 2021

This guidance will help customers address threats taking advantage of the recently disclosed Microsoft Exchange Server on-premises vulnerabilities CVE-2021-26855, CVE-2021-26858, CVE-2021-26857, and CVE-2021-27065, which are being exploited. We strongly urge customers to immediately update systems. Failing to address these vulnerabilities can result in compromise of your on-premises Exchange Server and, potentially, other parts of your internal network.

One-Click Microsoft Exchange On-Premises Mitigation Tool - March 2021

Monday, March 15, 2021

We have been actively working with customers through our customer support teams, third-party hosters, and partner network to help them secure their environments and respond to associated threats from the recent Exchange Server on-premises attacks. Based on these engagements we realized that there was a need for a simple, easy to use, automated solution that would meet the needs of customers using both current and out-of-support versions of on-premises Exchange Server.

Microsoft Exchange Server Vulnerabilities Mitigations - updated March 15, 2021

Friday, March 05, 2021

Update March 15, 2021: If you have not yet patched, and have not applied the mitigations referenced below, a one-click tool, the Exchange On-premises Mitigation Tool is now our recommended path to mitigate until you can patch. Microsoft previously blogged our strong recommendation that customers upgrade their on-premises Exchange environments to the latest supported version.

A new experience for reporting copyright or trademark infringement on Microsoft Services

Wednesday, March 03, 2021

The Notice of Copyright or Trademark Infringement Portal has helped protect Microsoft’s users and customers from intellectual property infringement across online services like Microsoft Azure, Office, Outlook, Skype, Stream, Microsoft News, Sway, Hotmail, NuGet, and Yammer. Microsoft’s response to claims of intellectual property infringement is driven by the reports you send us.