216.73.217.22

T1090.004: T1090.004

View on MITRE ATT&CK The MITRE Corporation · Published 16/12/2025 19:38 · Modified 20/04/2026 12:51

Essential information

MITRE technique ID
T1090.004
Confidence
100/100
Revoked
No
Published
16/12/2025 19:38
Modified
20/04/2026 12:51
Author / Source
The MITRE Corporation

Aliases

Domain Fronting

Platforms

windows macos linux ESXi

Description

Adversaries may take advantage of routing schemes in Content Delivery Networks (CDNs) and other services which host multiple domains to obfuscate the intended destination of HTTPS traffic or traffic tunneled through HTTPS. (Citation: Fifield Blocking Resistent Communication through domain fronting 2015) Domain fronting involves using different domain names in the SNI field of the TLS header and the Host field of the HTTP header. If both domains are served from the same CDN, then the CDN may route to the address specified in the HTTP header after unwrapping the TLS header. A variation of the the technique, "domainless" fronting, utilizes a SNI field that is left blank; this may allow the fronting to work even when the CDN attempts to validate that the SNI and HTTP Host fields match (if the blank SNI fields are ignored). For example, if domain-x and domain-y are customers of the same CDN, it is possible to place domain-x in the TLS header and domain-y in the HTTP header. Traffic will appear to be going to domain-x, however the CDN may route it to domain-y.

Kill chain phases

Kill chainPhase
mitre-attack command-and-control

Marking (TLP)

TLP:CLEAR Copyright 2015-2025, The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation.

External references