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When coin miners evolve, Part 1: Exposing LemonDuck and LemonCat, modern mining malware infrastructure

When coin miners evolve, Part 1: Exposing LemonDuck and LemonCat, modern mining malware infrastructure

[Note: In this two-part blog series, we expose a modern malware infrastructure and provide guidance for protecting against the wide range of threats it enables. Part 1 covers the evolution of the threat, how it spreads, and how it impacts ... continue reading
A matrix of attack techniques related to containerization technologies, organized by stages of an attack.

The evolution of a matrix: How ATT&CK for Containers was built

Note: The content of this post is being released jointly with the Center for Threat-Informed Defense. It is co-authored with Chris Ante and Matthew Bajzek. The Center post can be found here. As containers become a major part of many ... continue reading
Protecting customers from a private-sector offensive actor using 0-day exploits and DevilsTongue malware

Protecting customers from a private-sector offensive actor using 0-day exploits and DevilsTongue malware

The Microsoft Threat Intelligence Center (MSTIC) alongside the Microsoft Security Response Center (MSRC) has uncovered a private-sector offensive actor, or PSOA, that we are calling SOURGUM in possession of now-patched, Windows 0-day exploits (CVE-2021-31979 and CVE-2021-33771). Private-sector offensive actors are ... continue reading

How Microsoft Security empowers partners to build customer trust

As I reflect on my first year at Microsoft, it was both challenging and exceptional: from my remote onboarding in the middle of a pandemic to dramatic changes in the cyber landscape, to Microsoft’s critical role as a frontline responder ... continue reading
Microsoft discovers threat actor targeting SolarWinds Serv-U software with 0-day exploit

Microsoft discovers threat actor targeting SolarWinds Serv-U software with 0-day exploit

Microsoft has detected a 0-day remote code execution exploit being used to attack SolarWinds Serv-U FTP software in limited and targeted attacks. The Microsoft Threat Intelligence Center (MSTIC) attributes this campaign with high confidence to DEV-0322, a group operating out ... continue reading
Screenshot of command line showing extraction of filesystem from the firmware

Microsoft finds new NETGEAR firmware vulnerabilities that could lead to identity theft and full system compromise

The continuous improvement of security solutions has forced attackers to explore alternative ways to compromise systems. The rising number of firmware attacks and ransomware attacks via VPN devices and other internet-facing systems are examples of attacks initiated outside and below ... continue reading
Microsoft Security's three Zero Trust principles: verify explicitly, use least privileged access, and assume breach.

The critical role of Zero Trust in securing our world

We are operating in the most complex cybersecurity landscape that we’ve ever seen. While our current ability to detect and respond to attacks has matured incredibly quickly in recent years, bad actors haven’t been standing still. Large-scale attacks like those ... continue reading

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 ... continue reading
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Improve your threat detection and response with Microsoft and Wortell

This blog post is part of the Microsoft Intelligent Security Association (MISA) guest blog series. Learn more about MISA. The way of working is changing rapidly. Many workloads are moving to the cloud and the pandemic accelerated organizations to provide infrastructure to aid ... continue reading
Behind the scenes of business email compromise: Using cross-domain threat data to disrupt a large BEC campaign

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 get access ... continue reading