GoKawiilMicrosoft flags phishing campaign hiding invisible Unicode characters in finance-themed emails
Microsoft researchers identified a large phishing operation that inserts invisible Unicode 'Tags' characters inside finance-related keywords—splitting words like 'funding' into fragments—to slip past email filters that scan for suspicious terms. The campaign peaked at 2.37 million daily messages in late February and, despite a drop in volume by May, remains active, with Defender for Office 365 tracing it to 148 finance-themed sender domains.