Rising Threat: How Encoded URLs are Evading Secure Email Gateways
In a concerning trend observed recently, threat actors are increasingly leveraging encoded URLs to bypass secure email gateways (SEGs), posing a significant challenge to email security defenses. According to recent findings by Cofense, there has been a notable uptick in attacks where threat actors manipulate SEGs to encode or rewrite malicious URLs embedded in emails. This tactic exploits vulnerabilities in SEG technologies, allowing malicious links to slip through undetected to unsuspecting recipients.