Many organizations mistakenly believe that deploying multi-factor authentication (MFA) via cloud identity providers secures their entire environment. However, in Windows ecosystems, numerous authentication paths rely solely on Active Directory (AD) and bypass MFA prompts entirely. Attackers frequently exploit these gaps through interactive logons, direct RDP access, and legacy protocols like NTLM to move laterally within a network using valid credentials or stolen hashes.
To mitigate these risks, security teams must treat Windows authentication as a distinct attack surface. Key strategies include enforcing stronger passphrase policies, continuously blocking known breached credentials, and auditing high-risk service accounts. By addressing these often-overlooked paths, such as SMB authentication and Kerberos ticket abuse, organizations can significantly reduce the success rate of credential-based compromises.
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