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undo.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3]
"180F"=dword:00000000

Warning, this exposes you to the risk of NTLM hash leaks: https://textslashplain.com/2019/10/09/navigating-to-file-urls/#:~:text=to%20Edge%2095%2B.-,What%E2%80%99s%20the%20Risk%3F,-The%20most%20obvious

You should disable NTLM over SMB to address that risk: Set-SMbClientConfiguration -BlockNTLM $true from PowerShell. https://www.anoopcnair.com/windows-11-security-blocking-ntlm-over-smb/

can this be used at HKCU - i have limited regedit rights on my org computer (and an IT team that I can't go to for help with anything )

Yes, HKEY_CURRENT_USER will work fine so long as there's not an entry that overrides it in HKLM.

Thank you it worked!

Warning, this exposes you to the risk of NTLM hash leaks: https://textslashplain.com/2019/10/09/navigating-to-file-urls/#:~:text=to%20Edge%2095%2B.-,What%E2%80%99s%20the%20Risk%3F,-The%20most%20obvious

You should disable NTLM over SMB to address that risk: Set-SMbClientConfiguration -BlockNTLM $true from PowerShell. https://www.anoopcnair.com/windows-11-security-blocking-ntlm-over-smb/

It failed on Windows 10:

Set-SMbClientConfiguration -BlockNTLM $true
Set-SmbClientConfiguration : A parameter cannot be found that matches parameter name 'BlockNTLM'.
At line:1 char:28

• Set-SMbClientConfiguration -BlockNTLM $true

•                        ~~~~~~~~~~
  

  • CategoryInfo : InvalidArgument: (:) [Set-SmbClientConfiguration], ParameterBindingException
  • FullyQualifiedErrorId : NamedParameterNotFound,Set-SmbClientConfiguration

Is it the same if one configs it in Group Policy as shown below?

1. Run gpedit.msc

2. Navigate to: Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Options

3. Double-click "Network security: Restrict NTLM: Outgoing NTLM traffic to remote servers"

4. Set it to "Deny all"