Microsoft Azure TLS Issuing CA 05

Microsoft Azure TLS Issuing CA 05 is a publicly trusted intermediate certificate authority operated by Microsoft Corporation and chained to DigiCert Global Root G2. It is recognized by all mainstream browsers and operating system trust stores, so the certificate itself is not a phishing indicator - the same intermediate signs millions of legitimate sites. phishunt only flags the specific domains listed below as suspicious; Microsoft Azure TLS Issuing CA 05 as a CA is fine.

Microsoft Corporation issues RSA domain-validated certificates automatically and at no cost (or very low cost), which is the exact workflow scammers need to put HTTPS on a throwaway domain. Domain validation only proves that the requester controls the domain name, not that the site behind it is trustworthy. phishunt lists the specific domains currently flagged below — those are the suspicious ones, not Microsoft Azure TLS Issuing CA 05 itself.

In a desktop browser, click the padlock in the address bar and open the certificate viewer. Confirm the issuer chain ends at DigiCert Global Root G2, that the subject matches the domain you expect, and that the notAfter date has not passed. A valid Microsoft Azure TLS Issuing CA 05 certificate only proves TLS was negotiated correctly — always verify the domain name itself belongs to the service you intended to visit.

Microsoft Azure TLS Issuing CA 05 and its siblings (Microsoft Azure RSA TLS Issuing CA 03) share the same operator (Microsoft Corporation) and roll up to the same root (DigiCert Global Root G2). CAs rotate multiple intermediates so that if one key ever has to be revoked, the damage is contained. As a user, you can treat all of them as the same trust anchor.