Creating Noise: The Emerging Obfuscation Technique Designed to Evade Email Security NLP Detection Capabilities
KnowBe4, Monday, March 16th, 2026
Our Threat Intelligence team has observed an emerging obfuscation technique, specifically used to make Natural Language Processing (NLP) detection capabilities less effective.
Broadly, malicious actors are adding additional characters, break lines, and legitimate links to the end of a phishing email in an attempt to disguise their malicious payloads amongst the noise and evade NLP detection.
For this threat alert, our team analyzed 40 emerging attacks identified by KnowBe4 Defend that used this technique to understand how it works, why attackers are employing it, and its potential for success.