Windows Defender extension for Google Chrome

[German]Protection against online threads (phishing, malware websites) etc. for the Google Chrome browser? Microsoft makes it possible with a chrome extension.


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WalkingCat has posted this tweet on Twitter, mentions the new real time protection for Google Chrome browser.

Windows Defender Browser Protection was released on April 11, 2018 and can be downloaded for free from Google Webstore The installed extension can be switched on or off via an icon to the right of the address bar.

Eigenschaften der Defender Erweiterung

Protection against online threats

The browser extension promises to protect users from online threats such as phishing and malicious websites with (the Defender) real-time protection from Microsoft. The Windows Defender Browser Protection extension protects users from online threats such as links in phishing emails and websites that tempt them to download and install malicious software that can harm your computer.


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When users click a malicious link in an email or navigate to a Web site that triggers it to disclose financial, personal, or other sensitive information, or to a Web site that contains malware, Windows Defender Browser Protection checks it against a constantly updated list of malicious URLs known to Microsoft.

Windows Defender Browser Protection

If the malicious link matches one in the list, Windows Defender Browser Protection displays a red warning screen. This informs the user that the website being visited is known to be harmful. The extension prevents the display and makes it possible to leave the malicious website with one click.

Final words

On this website, Microsoft shows a graph comparing how different browsers detect phishing (see the figure below).

Phishing-Erkennraten

What I don’t understand there: Why the Google Chrome only reaches 87% there. All browsers, from Microsoft Edge to Google Chrome and Mozilla Firefox, have integrated phishing detection.


(Phishing detection in Google Chrome)

I had already covered this topic in more detail in 2014 as part of a phishing attack on German banks within the German blog post Phishing-Angriff auf Spar-, Volks- und Raiffeisenbank-Kunden. Within this article I covered the browser’s phishing filters and asked, why the browser vendors won’t cooperate and release one common phishing data base. Now we are in 2018, and nothing happened, although Firefox seems to use Google Safe Browsing, Microsoft uses it’s own smart filter …


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