"Wanna" ransomware outbreak. Please see this Sophos article sophos.com/kb/126733 for advice on how to protect your organization. Immediate action recommended.
Sophos Web Protection is able to perform URI security checks on HTTPS requests if the browser being used supports Server Name Indication (SNI).
SNI enabled browsers request the domain name before the certificate is committed to the server. This allows filtering applications to intercept the domain name request without having to intercept and decode HTTPS traffic.
Browsers that support SNI, and are supported by Sophos Web Protection are:
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