Cybersecurity

OAuth Device Code Phishing: A New Microsoft 365 Account Breach Vector

Ali NematiAli Nemati3 days ago37 sec read29 views

OAuth Device Code phishing is a sophisticated attack where attackers trick victims into approving login requests on legitimate Microsoft pages, resulting in OAuth tokens being issued to them instead of stealing credentials directly. This method bypasses traditional credential harvesting techniques and exploits trust in official authentication processes. The attack is challenging for security operations centers (SOCs) to detect due to the use of encrypted HTTPS traffic and legitimate infrastructure. SSL decryption helps by exposing hidden JavaScript and encrypted communications, revealing malicious activities that would otherwise blend into normal login behavior.

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Ali Nemati
Ali NematiWritten by Ali
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