MFA reset followed by new sign-in indicative of vishing/AiTM takeover
Detects a sequence of events where a user's MFA configuration is modified (typically via a help-desk impersonation vishing attack) followed closely by a successful sign-in from a new IP address. This pattern is indicative of attackers hijacking sessions or stealing credentials by coercing victims into resetting MFA settings.
YARA-L
