Partnering with the AV ecosystem to protect our Windows 10 customers

On Friday May 12th, and for several days afterwards, more than a quarter-million computers around the world fell victim to the ransomware known as WannaCrypt or WannaCry. As that recent event has shown, malicious actors bring nearly boundless time and skill to commit cybercrime that can cause harm to millions of people. That is why…

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Windows 10 Creators Update provides next-gen ransomware protection

Multiple high-profile incidents have demonstrated that ransomware can have catastrophic effects on all of us. From personally losing access to your own digital property, to being impacted because critical infrastructure or health care services are unexpectedly unavailable for extended periods of time, destructive attacks have grown in severity and scale on all platforms – including…


Combating a spate of Java malware with machine learning in real-time

In recent weeks, we have seen a surge in emails carrying fresh malicious Java (.jar) malware that use new techniques to evade antivirus protection. But with our research team’s automated expert systems and machine learning models, Windows 10 PCs get real-time protection against these latest threats. Attackers are constantly changing their methods and tools. We…

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Tech support scams persist with increasingly crafty techniques

Millions of users continue to encounter technical support scams. Data from Windows Defender SmartScreen (which is used by both Microsoft Edge and Internet Explorer to block malicious sites) and Windows Defender Antivirus show that some three million users are subjected to these threats every month. In addition to being rampant, technical support scams continue to…

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Detecting and mitigating elevation-of-privilege exploit for CVE-2017-0005

On March 14, 2017, Microsoft released security bulletin MS17-013 to address CVE-2017-0005, a vulnerability in the Windows Win32k component that could potentially allow elevation of privileges. A report from a trusted partner identified a zero-day exploit for this vulnerability. The exploit targeted older versions of Windows and allowed attackers to elevate process privileges on these platforms. In this article, we…

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Ransomware: A declining nuisance or an evolving menace?

The volume of ransomware encounters is on a downward trend. Are we seeing the beginning of the end of this vicious threat? Unfortunately, a look at the attack vectors, the number of unique families released into the wild, and the improvements in malware code reveals otherwise. Ransomware was arguably the biggest security story of 2016….

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Averting ransomware epidemics in corporate networks with Windows Defender ATP

Microsoft security researchers continue to observe ransomware campaigns blanketing the market and indiscriminately hitting potential targets. Unsurprisingly, these campaigns also continue to use email and the web as primary delivery mechanisms. Also, it appears that most corporate victims are simply caught by the wide nets cast by ransomware operators. Unlike cyberespionage groups, ransomware operators do…

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Detecting threat actors in recent German industrial attacks with Windows Defender ATP

When a Germany-based industrial conglomerate disclosed in December 2016 that it was breached early that year, the breach was revealed to be a professionally run industrial espionage attack. According to the German press, the intruders used the Winnti family of malware as their main implant, giving them persistent access to the conglomerate’s network as early…

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