Forg365: a commercial Microsoft 365 phishing-as-a-service kit bundling device-code + AiTM phishing, in-panel AI lure drafting, and a browser extension for SSO-cookie persistence

ZeroBEC's teardown, corroborated by BleepingComputer and a CSA Labs research note, describes Forg365 as a Telegram-distributed, subscription-priced (5-day trial, $400/month, $3,800/year) Microsoft 365 phishing-as-a-service platform that packages two independent credential-theft paths behind one operator console (ZeroBEC, 2026-07-09; BleepingComputer, 2026-07-09). The device-authorization branch presents a Microsoft-styled verification-code page and drives the legitimate Microsoft Authentication Broker flow; the adversary-in-the-middle branch classifies inbound traffic to decide whether to serve the phishing page or a benign decoy. Both converge on a valid, MFA-satisfied refresh token or session cookie because the victim completes the genuine Microsoft authentication, as CSA Labs puts it, "multifactor authentication does not stop the attack because the victim, not the attacker, is the one completing the MFA challenge" (CSA Labs, 2026-07-10). Two capabilities stand out beyond the already-covered device-code primitive: an AI lure-drafting assistant embedded directly in the panel alongside SMTP rotation, OAuth-app configuration and token vaulting, and ForgCookie, a Chrome/Edge/Brave extension that silently triggers OAuth flows to refresh the stolen SSO cookie so operator access outlives its normal expiry (ZeroBEC, 2026-07-09). ZeroBEC's Entra telemetry tied observed device-code activity to a residential ISP address, with a campaign-linked backend node later performing Microsoft Graph device-registration calls.