WannaCrypt ransomware worm targets out-of-date systems

On May 12, 2017 we detected a new ransomware that spreads like a worm by leveraging vulnerabilities that have been previously fixed. While security updates are automatically applied in most computers, some users and enterprises may delay deployment of patches. Unfortunately, the ransomware, known as WannaCrypt, appears to have affected computers that have not applied…

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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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World Backup Day is as good as any to back up your data

In today’s security landscape, there are more threats to data than ever before. Beyond corruption caused by hardware or human failure, malware and cyberattacks can put data in serious danger.  That’s why it’s imperative for enterprises, small-and-medium businesses, and individuals to back up data. It must be implemented systematically, not just on World Backup Day…

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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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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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