What you need to know
- Microsoft Teams now protects against phishing attacks with Safe Links in Microsoft Defender for Office 365.
- The feature scans links at the time someone clicks them because attackers can redirect clicks after they've been sent.
- Microsoft's systems block over 100 million phishing emails per month.
Safe Links support is now generally available in Microsoft Teams. It works within group chats and channels. The protection is available in Teams for organizations with Microsoft Defender for Office 365, which already works with OneDrive, SharePoint, and Microsoft's Office apps.
The Safe Links feature in Defender for Office 365 has been around since 2015. Every month Microsoft's detonation system detects "close to 2 million distinct URL-based payloads." Microsoft's system also blocks over 100 million phishing emails with malicious URLs each month. Now, that same protection is available in Microsoft Teams.
Microsoft's system scans links at the time of click because attackers attempt to find ways around normal forms of protection.
"As detection technologies evolve to block malicious sites quicker, sending malicious links to users becomes less effective. So attackers evolve their attacks," explains Microsoft. "Instead of sending malicious links to users, attackers now send benign links. Once the link has been delivered, the attacker redirects the link to a malicious site."
Attackers can redirect links to dangerous websites. Microsoft explains that someone could send a link that redirects to Microsoft.com when it's sent but then later change the link to redirect to a malicious site. Because of this, scanning the link when it's clicked, not just when it's sent, is important.
