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Microsoft Secure

Out of sight but not invisible: Defeating fileless malware with behavior monitoring, AMSI, and next-gen AV

Removing the need for files is the next progression of attacker techniques. While fileless techniques used to be employed almost exclusively in sophisticated cyberattacks, they are now becoming widespread in common malware, too....

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Office VBA + AMSI: Parting the veil on malicious macros

As part of our continued efforts to tackle entire classes of threats, Office 365 client applications now integrate with Antimalware Scan Interface (AMSI), enabling antivirus and other security solutions to scan macros and other scripts at runtime to check for malicious behavior. Macro-based threats have always been a prevalent entry point for malware, but we...

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Hawkeye Keylogger – Reborn v8: An in-depth campaign analysis

Much of cybercrime today is fueled by underground markets where malware and cybercriminal services are available for purchase. These markets in the deep web commoditize malware operations. Even novice cybercriminals can buy malware toolkits and other services they might need for malware campaigns: encryption, hosting, antimalware evasion, spamming, and many others. Hawkeye Keylogger is an...

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Image taken at the Microsoft Ignite Conference.

Assessing Microsoft 365 security solutions using the NIST Cybersecurity Framework

This blog is part of a series that responds to common questions we receive from customers about deployment of Microsoft 365 security solutions. In this series, you’ll find context, answers, and guidance for deployment and driving adoption within your organization. Check out our last blog New FastTrack benefit: Deployment support for Co-management on Windows 10 devices....

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Taking apart a double zero-day sample discovered in joint hunt with ESET

In late March 2018, I analyzed an interesting PDF sample found by ESET senior malware researcher Anton Cherepanov. The sample was initially reported to Microsoft as a potential exploit for an unknown Windows kernel vulnerability. During my investigation in parallel with ESET researchers, I was surprised to discover two new zero-day exploits in the same PDF....

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Machine learning vs. social engineering

Machine learning is a key driver in the constant evolution of security technologies at Microsoft. Machine learning allows Microsoft 365 to scale next-gen protection capabilities and enhance cloud-based, real-time blocking of new and unknown threats. Just in the last few months, machine learning has helped us to protect hundreds of thousands of customers against ransomware,...

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Securing the modern workplace with Microsoft 365 threat protection – part 4

This post is authored by Debraj Ghosh, Senior Product Marketing Manager, Microsoft 365 Security.  Responding to ransomware in the Modern Workplace Over the last few weeks, we have shared the roots of Microsoft 365 threat protection and how Microsoft 365 threat protection helps protect against and detect a modern ransomware attack. Today, we conclude our...

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