| Issue | Risk | Mitigation | |-------|------|-------------| | | Pass-the-hash, relay attacks | Enforce Kerberos; disable NTLM via Group Policy ( Network security: Restrict NTLM ) | | Guest access enabled | Unauthenticated access | Disable via Allow insecure guest auth policy or registry | | Saved credentials in CredMan | Lateral movement risk | Restrict with network access: Do not allow storage of passwords and credentials for network authentication | | SMB Signing disabled | Man-in-the-middle tampering | Enable via Microsoft network server: Digitally sign communications | | SMB1 enabled | Wormable exploits (e.g., WannaCry) | Remove via Disable-WindowsOptionalFeature -Online -FeatureName smb1protocol |
To require authentication and use matching local accounts or a service account, please try: * Create a local account on the shared... Microsoft Learn How to Test SMB Authentication - Knowledge Base - Outpost24 Purpose. This document describe how to test SMB authentication to a Windows system. Introduction. When configuring HIAB to use SMB... Outpost24 SMB File sharing Credentials needed - Microsoft Q&A 14 Oct 2025 — smb login windows
It explains the interplay between SMB, Kerberos, and NTLM, detailing how the Security Support Provider Interface (SSPI) abstracts the login process for applications. | Issue | Risk | Mitigation | |-------|------|-------------|
Microsoft has recently released new "white paper" style documentation on . These are essential if you are looking for current best practices: Introduction
For a look at how SMB logins are exploited (and thus how to secure them), these papers are highly regarded in the security community:
Choose a drive letter and enter the server path in the format \\ServerName\ShareName or \\IPAddress\ShareName .