Microsoft Defender SmartScreen evaluates a website's URLs to determine if they're known to distribute or host unsafe content. For more info about drive-by attacks, see Evolving Microsoft Defender SmartScreen to protect you from drive-by attacks Because drive-by attacks can happen even if the user does not click or download anything on the page, the danger often goes unnoticed. Drive-by attacks are web-based attacks that tend to start on a trusted site, targeting security vulnerabilities in commonly used software. It can also help protect against deceptive advertisements, scam sites, and drive-by attacks.

Microsoft Defender SmartScreen helps to protect users from sites that are reported to host phishing attacks or attempt to distribute malicious software. The primary benefits are:Īnti-phishing and anti-malware support. Microsoft Defender SmartScreen provide an early warning system against websites that might engage in phishing attacks or attempt to distribute malware through a socially engineered attack. If the file isn't on that list, Microsoft Defender SmartScreen shows a warning, advising caution.īenefits of Microsoft Defender SmartScreen If it finds a match, Microsoft Defender SmartScreen shows a warning to let the user know that the site might be malicious.Ĭhecking downloaded files against a list of files that are well known and downloaded by many Windows users. Microsoft Defender SmartScreen determines whether a downloaded app or app installer is potentially malicious by:Ĭhecking downloaded files against a list of reported malicious software sites and programs known to be unsafe. If it finds a match, Microsoft Defender SmartScreen shows a warning to let the user know that the site might be malicious. If Microsoft Defender SmartScreen determines that a page is suspicious, it will show a warning page to advise caution.Ĭhecking the visited sites against a dynamic list of reported phishing sites and malicious software sites. Microsoft Defender SmartScreen determines whether a site is potentially malicious by:Īnalyzing visited webpages looking for indications of suspicious behavior. Microsoft Defender SmartScreen protects against phishing or malware websites and applications, and the downloading of potentially malicious files.

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