Fake OAuth Apps Fuel MFA Phishing
In 2025, Proofpoint identified an ongoing phishing campaign abusing Microsoft OAuth applications to compromise Microsoft 365 accounts. Threat actors created malicious OAuth apps impersonating trusted services like Adobe, SharePoint, and DocuSign, using them as lures to redirect victims to attacker-in-the-middle (AiTM) phishing sites. These sites, powered by the Tycoon Phishing-as-a-Service platform, captured credentials and session…
