Tag: invisible unicode

Microsoft Warns of Phishing Campaign Using Invisible Unicode to Evade Filters

Microsoft uncovered a massive phishing campaign that sent a whopping 1-2.37 million messages daily on weekdays, peaking on February 26, 2026, and cleverly used invisible Unicode characters to slip past filters. The campaign's weekly rhythm was remarkably consistent, with a sharp drop in activity after May 15, 2026.