Tycoon2FA, the dominant phishing-as-a-service platform responsible for an estimated 62% of Microsoft-blocked phishing traffic, restored full operations within days of a March 4, 2026 Europol-led domain seizure, confirming that infrastructure takedowns without operator arrests do not neutralize this threat. The platform proxies authentication sessions in real time to bypass MFA and harvest session cookies, targeting Microsoft 365 and Gmail; standard TOTP and SMS-based MFA provide no protection against this technique. Enforce phishing-resistant FIDO2/hardware key MFA for all privileged and executive accounts immediately, audit Microsoft 365 and Gmail for unauthorized email forwarding rules and OAuth consents, and deploy Entra ID Conditional Access policies and Microsoft Defender for Cloud Apps anomalous session detection to identify AiTM session cookie theft.