Attacker-Controlled MFA Method Registration Post-Suspicious Sign-In

Ibrahim Saud@tektrix

•updated Sep 18, 2026•1•0•4

Detects when a user registers a new MFA or authentication method, such as a software token or authenticator app, within one hour of a suspicious sign-in event. This pattern is commonly indicative of an adversary establishing persistence or bypassing authentication controls following account compromise via phishing or credential harvesting.