Domain Fronting With Azure

My interest was recently renewed by this detailed blog post by digininja and this one by rvrsh3ll.

Domain fronting with azure. Domain fronting is a technique for internet censorship circumvention that uses different domain names in different communication layers of an https connection to discreetly connect to a different target domain than is discernable to third parties monitoring the requests and connections. Empire domain fronting with microsoft azure feb 27 2019 6 minute read introduction. While domain fronting isn t a new technique for offensive infrastructure it continues to be a valid method for bypassing network restrictions hiding from defenders and protecting your. It s still actively being used by red teams and malicious operators.

Sie erleichtern die verwaltung von benutzerdefinierten domänen für azure app service. Domain fronting is a critical tool to keep the web open for people who live in repressive regimes said stephanie whited a tor spokesperson. Please try again later. A week after amazon had joined google in blocking domain fronting the tor project published domain fronting is critical to the open web a treatise on the importance of domain fronting to internet privacy and detailing the move to microsoft azure.

Due to quirks in security certificates the redirect systems of the content delivery networks cdns used. This feature is not available right now. App service domänen sind domänen der obersten ebene die direkt in azure verwaltet werden. They turned to microsoft azure the biggest cloud provider to still allow domain fronting as a result.

It helps to mask your c2 traffic behind well known domains and does a fairly good job at keeping defenders in the dark. Considering the way in which domain fronting works it will not be feasible to block cdns since popular domains like microsoft azure amazon aws use it and blocking those domains will lead to monetary losses and possible business disruption due to the resources hosted by such services. Domain fronting used to be all the rage a while back. When a site is set up on a content delivery network cdn such as amazon cloudfront cloudflare microsoft azure cdn or google cloud cdn a cname record for the domain is setup to point at the cdn servers and something similar to a named vhost is setup on the cdn web servers so it can respond to the request.