Offensive SPF: How to Automate Anti-Phishing Reconnaissance Using Sender Policy Framework
Summary
This article details a method for automating reconnaissance of Sender Policy Framework (SPF) violations to aid in anti-phishing efforts. It describes the process of building a system to actively identify these misconfigurations.
IFF Assessment
FOE
The article describes techniques that could be used by attackers to find misconfigurations and potentially exploit them for phishing campaigns, making it bad news for defenders.
Defender Context
Understanding how SPF can be misused for reconnaissance is crucial for defenders to strengthen their email security posture. Organizations should regularly audit their SPF records and monitor for unusual or unauthorized mail servers attempting to send emails on their behalf.