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Mar 13, 2026

Weekly Abnormal Detection Enhancements

A weekly summary of detection enhancements delivered by the Abnormal engineering team.

Weekly Detection Enhancements - Week of March 13

  • Enhanced graymail detection with integrated phishing-training classification to reduce inbox noise

  • Launched deep PDF invoice inspection to improve vendor fraud detection accuracy

  • Added detection for display-name spoofing attacks that use rare, unusually long sender names

  • Introduced vendor fraud detection using font-based signals to identify altered invoices and payment requests

  • Deployed detection for credential phishing disguised as bid and proposal requests targeting procurement workflows

  • Released detection for credential phishing abusing trusted Salesforce automated emails with embedded malicious links

  • Launched detections for vendor fraud using newly registered or mismatched reply-to domains to redirect payments

  • Deployed detection for Microsoft billing impersonation using phone-based callback phishing

Protect Against Evolving Email Threats

See how behavioral AI detects attacks that legacy defenses miss.