Threat actors may attempt to phish users in order to hijack a users sign-in session, and skip the authentication process even if the user had enabled multifactor authentication (MFA) by stealing and replaying stolen credentials and session cookies. This detection looks for successful Microsoft Entra ID sign ins that had a high risk profile, indicating it had suspicious characteristics such as an unusual location, ISP, user agent, or use of anonymizer services. It then looks for a network connection to the IP address that made the sign in immediately before the sign in, that may indicate a user connecting to a phishing site at that IP address and having their authentication session hijacked. Ref: https://www.microsoft.com/security/blog/2022/07/12/from-cookie-theft-to-bec-attackers-use-aitm-phishing-sites-as-entry-point-to-further-financial-fraud/

0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.