Windows 10 Updates Target Ransomware Threats

Microsoft strengthens Windows 10 security with measures to prevent, detect, and respond to ransomware attacks. But they are only useful for businesses using all the right tools.

Ransomware is a priority in Microsofts Windows 10 Anniversary Update, a major upgrade to the OS released one year after its public launch.
The bundle includes security built to protect businesses by discovering and addressing ransomware threats.
According to Microsoft
, the number of ransomware variants has more than doubled in the last 12 months.
Ransomware is what I would call the quick-hit, low-hanging fruit type of opportunity for a threat actor, said Chris Goettl, senior product manager for the security team at Landesk. You can distribute it to a wider market, you can charge an amount likely to be easily paid … you can diversify it pretty well.
To fight the growing threat, Microsoft has added new security measures to different aspects of Windows 10. These updates were organized into three categories for ransomware prevention, detection, and response.
While the additions improve on ransomware defense in Windows 10, they wont help users who dont have various components of the Microsoft suite, Goettl noted. Some products, like Microsoft Edge and Windows Defender, were strengthened in the Anniversary Updated but arent as frequently used among businesses.
For example, consider the Edge browser. It was updated so Adobe Flash Player, a plugin frequently used by exploit writers, will run in an isolated container. Edge has also been adjusted so an exploit running in the browser cannot execute another program; this blocks malware from silently downloading and executing on users systems.
Edge may be safer, but the added protection means little if people dont use it. Microsofts new browser is not as popular as competitors Chrome and Firefox.
When Microsoft says theyve hardened the browser, I have to then adopt that browser and make sure all my users are using that browser, said Goettl. Youre forcing users to use a specific type of technology, but theyre going to use what they like to use.
In other preventive updates, Microsoft improved its email services to block ransomware, developed machine learning models to catch ransomware stored in file attachments, and created a faster signature delivery channel to quickly update Windows Defender running in email.
To accelerate ransomware detection, Microsoft improved cloud protection in Windows Defender and improved behavioral heuristics. This way, the tool can determine if a file is performing ransomware-related activities, and quickly take action.
Windows Defender is getting better with behavioral heuristics, said Goettl, and businesses should have something to detect ransomware. However, the signature-based technology limits its ability to address threats as quickly as other platforms. There are several non-signature-based protection platforms, and many companies wont choose Windows Defender if theyre seeking the best value for their dollars, he explained.
In the event these defensive layers fail, Microsoft upped ransomware response with Windows Defender Advanced Threat Protection (ATP) so companies can detect and address attacks. The tool combines security events gathered from machines and sends alerts to enterprise security teams.
When Windows Defender ATP is combined with Office 365 ATP, the two share signals to give a holistic view of enterprise attacks. This gives a higher level of protection, said Goettl, but organizations who want it will have to adopt the full Microsoft model including Windows 10, Office 365 ATP, and Windows Defender. Many businesses are adopting Office 365, but this doesnt necessarily mean theyre adopting Office 365 ATP.
Microsofts updates arrive as businesses are struggling to mitigate the risk of ransomware. Its difficult to safeguard against these types of attacks, which trick individual users by mimicking things they know and trust.
Ransomware is one of the bigger challenges facing us today, said Goettl, noting how attackers will continue to use the opportunity for quick, repetitive payouts. Its here to stay, its not going anywhere, and its going to continue to be a threat to our environments.
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