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@jaredhaight
Forked from mackwage/windows_hardening.cmd
Last active April 28, 2024 16:59
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Script to perform some hardening of Windows OS.
::
::#######################################################################
::
:: Change file associations to protect against common ransomware attacks
:: Note that if you legitimately use these extensions, like .bat, you will now need to execute them manually from cmd or powershell
:: Alternatively, you can right-click on them and hit 'Run as Administrator' but ensure it's a script you want to run :)
:: ---------------------
ftype htafile="%SystemRoot%\system32\NOTEPAD.EXE" "%1"
ftype WSHFile="%SystemRoot%\system32\NOTEPAD.EXE" "%1"
ftype batfile="%SystemRoot%\system32\NOTEPAD.EXE" "%1"
::
::#######################################################################
::
:: Enable ASR rules in Win10 1709 ExploitGuard to mitigate Offic malspam
:: Blocks Office childprocs, Office proc injection, Office win32 api calls & executable content creation
:: Note these only work when Defender is your primary AV
:: Source: https://www.darkoperator.com/blog/2017/11/11/windows-defender-exploit-guard-asr-rules-for-office
:: ---------------------
::%programfiles%\"Windows Defender"\MpCmdRun.exe -RestoreDefaults
:: Block Office applications from creating child processes
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids D4F940AB-401B-4EFC-AADC-AD5F3C50688A -AttackSurfaceReductionRules_Actions Enabled
:: Block Office applications from injecting code into other processes
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids 75668C1F-73B5-4CF0-BB93-3ECF5CB7CC84 -AttackSurfaceReductionRules_Actions enable
:: Block Win32 API calls from Office macro
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids 92E97FA1-2EDF-4476-BDD6-9DD0B4DDDC7B -AttackSurfaceReductionRules_Actions enable
:: Block Office applications from creating executable content
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids '3B576869-A4EC-4529-8536-B80A7769E899' -AttackSurfaceReductionRules_Actions enable
:: Block execution of potentially obfuscated scripts
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids 5BEB7EFE-FD9A-4556-801D-275E5FFC04CC -AttackSurfaceReductionRules_Actions Enabled
:: Block executable content from email client and webmail
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids BE9BA2D9-53EA-4CDC-84E5-9B1EEEE46550 -AttackSurfaceReductionRules_Actions Enabled
:: Block JavaScript or VBScript from launching downloaded executable content
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids D3E037E1-3EB8-44C8-A917-57927947596D -AttackSurfaceReductionRules_Actions Enabled
::
::#######################################################################
:: Enable Cloud functionality of Windows Defender
::#######################################################################
powershell.exe Set-MpPreference -MAPSReporting Advanced
powershell.exe Set-MpPreference -SubmitSamplesConsent Always
::#######################################################################
::
:: Harden all version of MS Office itself against common malspam attacks
:: Disables Macros, enables ProtectedView
:: Source: https://decentsecurity.com/block-office-macros/
:: ---------------------
reg add "HKCU\Software\Policies\Microsoft\Office\12.0\Publisher\Security" /v vbawarnings /t REG_DWORD /d 4 /f
reg add "HKCU\Software\Policies\Microsoft\Office\12.0\Word\Security" /v vbawarnings /t REG_DWORD /d 4 /f
reg add "HKCU\Software\Policies\Microsoft\Office\14.0\Publisher\Security" /v vbawarnings /t REG_DWORD /d 4 /f
reg add "HKCU\Software\Policies\Microsoft\Office\14.0\Word\Security" /v vbawarnings /t REG_DWORD /d 4 /f
reg add "HKCU\Software\Policies\Microsoft\Office\15.0\Outlook\Security" /v markinternalasunsafe /t REG_DWORD /d 0 /f
reg add "HKCU\Software\Policies\Microsoft\Office\15.0\Word\Security" /v blockcontentexecutionfrominternet /t REG_DWORD /d 1 /f
reg add "HKCU\Software\Policies\Microsoft\Office\15.0\Excel\Security" /v blockcontentexecutionfrominternet /t REG_DWORD /d 1 /f
reg add "HKCU\Software\Policies\Microsoft\Office\15.0\PowerPoint\Security" /v blockcontentexecutionfrominternet /t REG_DWORD /d 1 /f
reg add "HKCU\Software\Policies\Microsoft\Office\15.0\Word\Security" /v vbawarnings /t REG_DWORD /d 4 /f
reg add "HKCU\Software\Policies\Microsoft\Office\15.0\Publisher\Security" /v vbawarnings /t REG_DWORD /d 4 /f
reg add "HKCU\Software\Policies\Microsoft\Office\16.0\Outlook\Security" /v markinternalasunsafe /t REG_DWORD /d 0 /f
reg add "HKCU\Software\Policies\Microsoft\Office\16.0\Word\Security" /v blockcontentexecutionfrominternet /t REG_DWORD /d 1 /f
reg add "HKCU\Software\Policies\Microsoft\Office\16.0\Excel\Security" /v blockcontentexecutionfrominternet /t REG_DWORD /d 1 /f
reg add "HKCU\Software\Policies\Microsoft\Office\16.0\PowerPoint\Security" /v blockcontentexecutionfrominternet /t REG_DWORD /d 1 /f
reg add "HKCU\Software\Policies\Microsoft\Office\16.0\Word\Security" /v vbawarnings /t REG_DWORD /d 4 /f
reg add "HKCU\Software\Policies\Microsoft\Office\16.0\Publisher\Security" /v vbawarnings /t REG_DWORD /d 4 /f
::
::#######################################################################
::
:: Harden all version of MS Office itself against DDE malspam attacks
:: Disables Macros, enables ProtectedView
:: Source: https://gist.github.com/wdormann/732bb88d9b5dd5a66c9f1e1498f31a1b
:: ---------------------
::
reg add "HKCU\Software\Microsoft\Office\14.0\Word\Options" /v DontUpdateLinks /t REG_DWORD /d 00000001 /f
reg add "HKCU\Software\Microsoft\Office\14.0\Word\Options\WordMail" /v DontUpdateLinks /t REG_DWORD /d 00000001 /f
reg add "HKCU\Software\Microsoft\Office\15.0\Word\Options" /v DontUpdateLinks /t REG_DWORD /d 00000001 /f
reg add "HKCU\Software\Microsoft\Office\15.0\Word\Options\WordMail" /v DontUpdateLinks /t REG_DWORD /d 00000001 /f
reg add "HKCU\Software\Microsoft\Office\16.0\Word\Options" /v DontUpdateLinks /t REG_DWORD /d 00000001 /f
reg add "HKCU\Software\Microsoft\Office\16.0\Word\Options\WordMail" /v DontUpdateLinks /t REG_DWORD /d 00000001 /f
::#######################################################################
::
:: General OS hardening
:: Disables DNS multicast, smbv1, netbios, powershellv2
:: Enables UAC and sets to always notify
:: ---------------------
reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\DNSClient" /v EnableMulticast /t REG_DWORD /d 1 /f
reg add "HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters" /v SMB1 /t REG_DWORD /d 0 /f
reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v EnableLUA /t REG_DWORD /d 1 /f
reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v ConsentPromptBehaviorAdmin /t REG_DWORD /d 2 /f
net stop WinRM
wmic /interactive:off nicconfig where TcpipNetbiosOptions=1 call SetTcpipNetbios 2
powershell.exe Disable-WindowsOptionalFeature -Online -FeatureName smb1protocol
powershell.exe Disable-WindowsOptionalFeature -Online -FeatureName MicrosoftWindowsPowerShellV2
powershell.exe Disable-WindowsOptionalFeature -Online -FeatureName MicrosoftWindowsPowerShellV2Root
::
::#######################################################################
::
:: Harden lsass to help protect against credential dumping (mimikatz)
:: Configures lsass.exe as a protected process and disabled wdigest
:: Source: https://technet.microsoft.com/en-us/library/dn408187(v=ws.11).aspx
:: ---------------------
reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\LSASS.exe" /v AuditLevel /t REG_DWORD /d 00000008 /f
reg add "HKLM\SYSTEM\CurrentControlSet\Control\Lsa" /v RunAsPPL /t REG_DWORD /d 00000001 /f
reg add "HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\WDigest" /v UseLogonCredential /t REG_DWORD /d 0 /f
::
::#######################################################################
::
:: Enable Windows Firewall and configure some advanced options
:: Block Win32 binaries from making netconns when they shouldn't
:: ---------------------
NetSh Advfirewall set allprofiles state on
Netsh.exe advfirewall firewall add rule name="Block Notepad.exe netconns" program="%systemroot%\system32\notepad.exe" protocol=tcp dir=out enable=yes action=block profile=any
Netsh.exe advfirewall firewall add rule name="Block regsvr32.exe netconns" program="%systemroot%\system32\regsvr32.exe" protocol=tcp dir=out enable=yes action=block profile=any
Netsh.exe advfirewall firewall add rule name="Block calc.exe netconns" program="%systemroot%\system32\calc.exe" protocol=tcp dir=out enable=yes action=block profile=any
Netsh.exe advfirewall firewall add rule name="Block mshta.exe netconns" program="%systemroot%\system32\mshta.exe" protocol=tcp dir=out enable=yes action=block profile=any
Netsh.exe advfirewall firewall add rule name="Block wscript.exe netconns" program="%systemroot%\system32\wscript.exe" protocol=tcp dir=out enable=yes action=block profile=any
Netsh.exe advfirewall firewall add rule name="Block cscript.exe netconns" program="%systemroot%\system32\cscript.exe" protocol=tcp dir=out enable=yes action=block profile=any
Netsh.exe advfirewall firewall add rule name="Block runscripthelper.exe netconns" program="%systemroot%\system32\runscripthelper.exe" protocol=tcp dir=out enable=yes action=block profile=any
::
:: Enable Firewall Logging
netsh advfirewall set currentprofile logging filename %systemroot%\system32\LogFiles\Firewall\pfirewall.log
netsh advfirewall set currentprofile logging maxfilesize 4096
netsh advfirewall set currentprofile logging droppedconnections enable
::
:: Block all inbound connections on Public profile
netsh advfirewall set publicprofile firewallpolicy blockinboundalways,allowoutbound
:: Enable Windows Defender Network Protection
powershell.exe Set-MpPreference -EnableNetworkProtection Enabled
@cteodor
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cteodor commented Sep 11, 2018

n.b. EnableMulticast 1 means the policy is actually enabled

@Sha8139lol
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What benchmark version are this?

@rafalfitt
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it is sad that all these notepad.exe/cscript.exe/calc.exe exist also in C:\Windows\WinSxS\ :-(

And the path contains build number, so it will have to update the rules)
2019-11-01 110835

https://github.com/api0cradle/UltimateAppLockerByPassList/blob/master/md/Runscripthelper.exe.md

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