OAuth illicit consent grant phish — email masquerades as a Google Docs / Microsoft 365 / DocuSign / Dropbox share and asks the victim to authorize a third-party OAuth app that silently grants attacker persistent mailbox read/send access (Microsoft Digital Defense Report 2025 identified this as the fastest-growing enterprise phishing vector)
fake-oauth-illicit-consent-grant-phish
What this tier means
High-confidence threat indicator — phishing, impersonation, BEC, or scam pattern. Strong contributor to the trash decision.
How Gorganizer detects this
Email masquerading as a Google Docs share, Microsoft 365 app consent prompt, DocuSign viewer request, or Dropbox folder access that asks the recipient to authorize a third-party OAuth app. Clicking grant/allow hands the attacker persistent read + send permissions on the victim's mailbox, bypassing password and MFA entirely — the app now IS the account. Microsoft Digital Defense Report 2025 named illicit consent grant the fastest-growing enterprise phishing vector, driving a notable share of business email compromise losses. Genuine Google and Microsoft share notifications never ask the user to authorize a net-new app; the OAuth consent screen itself is hosted on google.com / microsoftonline.com, not a third-party look-alike domain.
False-positive guard
Every signal in Gorganizer feeds a multi-module score — never a sole verdict. This is a threat-tier signal — it adds a strong contribution to the trash score. The full pipeline still requires convergence across multiple modules + a margin over the safety floor before deletion happens, and Gmail's trash (30-day recovery) is always used — never permanent delete.
About the scoring engine
Gorganizer's scoring engine emits over 1,800 signals across six modules — headers, sender, subject, body, attachments, and structural metadata. Every email is scored by every module independently; the final verdict requires multiple modules to agree and the trash score to beat the safety floor by a margin.
Sacred safety guards — never delete starred emails, replies, calendar invites, receipts/invoices, or attachments — apply unconditionally regardless of any signal.
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