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Phishing assaults are abusing Microsoft Azure’s Static Internet Apps service to steal Microsoft, Workplace 365, Outlook, and OneDrive credentials.
Azure Static Internet Apps is a Microsoft service that helps construct and deploy full-stack internet apps to Azure from GitHub or Azure DevOps code repositories.
It permits builders to make use of customized domains for branding internet apps, and it supplies webhosting for static content material comparable to HTML, CSS, JavaScript, and pictures.
As safety researcher MalwareHunterTeam found, menace actors have additionally seen that the customized branding and the webhosting options can simply be used to host static touchdown phishing pages.
Attackers are actually actively utilizing Microsoft’s service in opposition to its clients, actively focusing on customers with Microsoft, Workplace 365, Outlook, and OneDrive accounts.
As proven beneath, a few of the touchdown pages and login varieties utilized in these phishing campaigns look virtually precisely like official Microsoft pages.
Azure Static Internet Apps phishing pages (BleepingComputer)
Azure Static Internet Apps provides legitimacy
Utilizing the Azure Static Internet Apps platform to focus on Microsoft customers is a superb tactic. Every touchdown web page robotically will get its personal safe web page padlock within the handle bar because of the *.1.azurestaticapps.web wildcard TLS certificates.
This may probably trick even essentially the most suspicious targets after seeing the certificates issued by Microsoft Azure TLS Issuing CA 05 to *.1.azurestaticapps.web, thus validating the phishing web page as an official Microsoft login type within the eyes of potential victims.
This additionally makes such touchdown pages a useful instrument when focusing on the customers of different platforms, together with Rackspace, AOL, Yahoo, and different electronic mail suppliers, because of the faux veil of safety added by the professional Microsoft TLS certs.
1.azurestaticapps.web wildcard Microsoft TLS certificates
When attempting to detect when a phishing assault is focusing on you, the usual recommendation is to carefully test the URL when requested to fill in your account credentials in a login type.
Sadly, the phishing campaigns abusing Azure Static Internet Apps make this recommendation virtually nugatory since many customers will get tricked by the azurestaticapps.web subdomain and the legitimate TLS certificates.
This isn’t the primary time a Microsoft service has been exploited in phishing assaults to focus on the corporate’s personal clients.
Phishing campaigns additionally use the *.blob.core.home windows.web wildcard certificates offered by Microsoft’s Azure Blob Storage to focus on Workplace 365 and Outlook customers.
BleepingComputer reached out to Microsoft for remark and we’ll replace the story if we hear again.
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