Script to perform some hardening of Windows OS

windows_hardening.cmd

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::#######################################################################
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:: 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"
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::#######################################################################
::
:: Enable ASR rules in Win10 1709 ExploitGuard to mitigate Office 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
:: Source: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard
:: Source: https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-atp/attack-surface-reduction
:: Easy methods to test rules https://demo.wd.microsoft.com/?ocid=cx-wddocs-testground
:: Resource on the rules and associated event IDs https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-atp/event-views
:: ---------------------
:: Reset Defender to defaults. Commented out but available for reference
::%programfiles%\"Windows Defender"\MpCmdRun.exe -RestoreDefaults
::
:: Block Office Child Process Creation 
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids D4F940AB-401B-4EFC-AADC-AD5F3C50688A -AttackSurfaceReductionRules_Actions Enabled
:: Block Process Injection
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids 75668C1F-73B5-4CF0-BB93-3ECF5CB7CC84 -AttackSurfaceReductionRules_Actions Enabled
:: Block Win32 API calls in macros
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids 92E97FA1-2EDF-4476-BDD6-9DD0B4DDDC7B -AttackSurfaceReductionRules_Actions Enabled
:: Block Office from creating executables
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids 3B576869-A4EC-4529-8536-B80A7769E899 -AttackSurfaceReductionRules_Actions Enabled
:: 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
:: Block lsass cred theft
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids 9e6c4e1f-7d60-472f-ba1a-a39ef669e4b2 -AttackSurfaceReductionRules_Actions Enabled
:: Block untrusted and unsigned processes that run from USB
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids b2b3f03d-6a65-4f7b-a9c7-1c7ef74a9ba4 -AttackSurfaceReductionRules_Actions Enabled
:: Block Adobe Reader from creating child processes
powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids 7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c -AttackSurfaceReductionRules_Actions Enabled
:: Block persistence through WMI event subscription
:: This one is commented out as it is currently not supported by MS
:: powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids e6db77e5-3df2-4cf1-b95a-636979351e5b -AttackSurfaceReductionRules_Actions Enabled
:: Block process creations originating from PSExec and WMI commands
:: This one is commented out as it is currently not supported by MS
::powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids d1e49aac-8f56-4280-b9ba-993a6d77406c -AttackSurfaceReductionRules_Actions Enabled
:: Block executable files from running unless they meet a prevalence, age, or trusted list criterion
:: This one is commented out for now as I need to research and test more to determine potential impact
:: powershell.exe Add-MpPreference -AttackSurfaceReductionRules_Ids 01443614-cd74-433a-b99e-2ecdc07bfc25 -AttackSurfaceReductionRules_Actions Enabled
::
::Enable Windows Defender sandboxing
::Source: https://cloudblogs.microsoft.com/microsoftsecure/2018/10/26/windows-defender-antivirus-can-now-run-in-a-sandbox/
::
setx /M MP_FORCE_USE_SANDBOX 1
::
::Enable Windows Defender Application Guard
::Source: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-guard/install-wd-app-guard 
:: This setting is commented out as it eanbles subset of DC/CG which renders other virtualization products unsuable. Can be enabled if you don't use
::
::powershell.exe Enable-WindowsOptionalFeature -online -FeatureName Windows-Defender-ApplicationGuard -norestart
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::Enable Defender exploit protection
::Source: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-exploit-guard/customize-exploit-protection
::
powershell.exe Set-Processmitigation -System -Enable DEP,BottomUp,SEHOP
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:: The following variant also enables forced ASLR and CFG but causes issues with several third party apps
::powershell.exe Set-Processmitigation -System -Enable DEP,CFG,ForceRelocateImages,BottomUp,SEHOP
::
::#######################################################################
::
:: 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
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::#######################################################################
::
:: 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
:: ---------------------
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
net stop WinRM
wmic /interactive:off nicconfig where TcpipNetbiosOptions=1 call SetTcpipNetbios 2
powershell.exe Disable-WindowsOptionalFeature -Online -FeatureName smb1protocol -norestart
powershell.exe Disable-WindowsOptionalFeature -Online -FeatureName MicrosoftWindowsPowerShellV2 -norestart
powershell.exe Disable-WindowsOptionalFeature -Online -FeatureName MicrosoftWindowsPowerShellV2Root -norestart
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:: Harden lsass to help protect against credential dumping (mimikatz) and audit lsass access requests
:: Configures lsass.exe as a protected process and disables 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
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::#######################################################################
::
:: 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
Netsh.exe advfirewall firewall add rule name="Block hh.exe netconns" program="%systemroot%\system32\hh.exe" protocol=tcp dir=out enable=yes action=block profile=any
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::#######################################################################
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:: Update Flash
:: ---------------------
::%WINDIR%\system32\macromed\flash\FlashUtil_ActiveX.exe -update activex
::%WINDIR%\system32\macromed\flash\FlashUtil_Plugin.exe -update plugin
::
::#######################################################################
::
:: Uninstall unneeded apps
:: ---------------------
::wmic.exe /interactive:off product where "name like 'Adobe Air%' and version like'%'" call uninstall
::wmic.exe /interactive:off product where "name like 'Adobe Flash%' and version like'%'" call uninstall
::wmic.exe /interactive:off product where "name like 'Java%' and version like'%'" call uninstall
::#######################################################################
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:: Uninstall pups
:: ---------------------
:: wmic.exe /interactive:off product where "name like 'Ask Part%' and version like'%'" call uninstall
:: wmic.exe /interactive:off product where "name like 'searchAssistant%' and version like'%'" call uninstall
:: wmic.exe /interactive:off product where "name like 'Weatherbug%' and version like'%'" call uninstall
:: wmic.exe /interactive:off product where "name like 'ShopAtHome%' and version like'%'" call uninstall