
Google Cloud (ex. Mandiant): https://cloud.google.com/blog/topics/threat-intelligence/session-stealing-browser-in-the-middle/
Mandiant details in this article Browser-in-the-Middle (BitM) attacks, a sophisticated session stealing technique that bypasses multi-factor authentication. Unlike traditional transparent proxies like Evilginx2 that require extensive customization, BitM offers attackers a streamlined approach to compromise web application sessions with minimal configuration. The article describes Mandiant's internal tool 'Delusion' for performing BitM attacks and demonstrates how attackers can steal authenticated sessions even when protected by MFA. The authors recommend implementing hardware-based MFA solutions like FIDO2 security keys and client certificates as effective countermeasures against these attacks.
