Safe links6/19/2023 The * characters appear to be substitutes for the % character used to mark encoded URL parameters not sure why they're doing that but I expect they had reasons. The link will redirect to "ht tp://actually sale.c om/" (remove the spaces to turn it back into a real URL). Outlook web access rewrites all URLs to pass through its filter, so if you checked the entire URL all you got was "is malicious?" and of course the answer is no. Owen Nelson's The Problem With Microsoft's Safelinks adds the privacy problems: both Microsoft and the administrators of an Office 365 tenant can see the original URLs that may contain sensitive information.Īs these are not the direct URLs, urlscan.io & won't work for them. Provides a false sense of security, making people click all links recklessly again.ĥ Reasons Microsoft Safe Links Make Office 365 Less Safe adds that the protection is mainly blacklist based and can't handle 0-days / unknown URLs (although it's advertising Avanan's own products, it's a good article on this matter). Using redirection services / URL shortener sites.Showing different, harmless content to ATP servers (list of them is publicly available).Using Slightly modified " href=" tags the ATP Safe Links isn't recognizing as links.Cryptron Security's Security analysis of O365 ATP reveals that it's possible to bypass the ATP Safe Links by This nullifies all the hard work put for educating the users on how they should handle suspicious URLs. But the link may be nothing but safe, and the protection may get its detection wrong, redirecting the user to a malicious site. Following this method the user may believe that this is a URL from a trustworthy site / over a secure TLS connection It's even expilicitly mentioned in the URL that it's a safe link and you are under a protection. Typically the user decides whether a link is safe or not by examining the URL as schroeder described in his answer. ( How ATP Safe Links works.) What "Safe Links" does is a totally bad practice for several reasons: If a user clicks the link, it first goes to Microsoft's site that then evaluates whether it thinks the link is safe or not, and then passes the user to the original site or gives a warning. This replaces suspicious links in emails with links. Advanced security for Office 365 subscribers.
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