Work in progress. Just a list of recommended stuff that has been compiled. Still busy trying to make this 100/100/95/100 (A+) however I am missing functionality within windows at that point in time. Will update with my findings. Run this in Powershell to Disable SSLv3.0 / Poodle and the considered weak ciphers. I do however enable TLS 1.0 with this which you might not want to do.
Write-Host ' '
Write-Host '--------------------------------------------------------------------------------'
Write-Host -ForegroundColor Yellow 'Configuring IIS with SSL/TLS Best Practices... v0.6'
Write-Host '--------------------------------------------------------------------------------'
Write-Host ' '
Write-Host 'This powershell script will disable weak ciphers and SSLv2 and SSLv3 for '
Write-Host 'Windows servers. It will not do any checks whether or not it was enabled.'
Write-Host ' '
Write-Host '--------------------------------------------------------------------------------'
Write-Host -ForegroundColor Yellow 'Disabling insecure protocols in registry...'
Write-Host '--------------------------------------------------------------------------------'
# Disable Multi-Protocol Unified Hello
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\Multi-Protocol Unified Hello\Client' -Force | Out-Null
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\Multi-Protocol Unified Hello\Server' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\Multi-Protocol Unified Hello\Client' -name Enabled -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\Multi-Protocol Unified Hello\Client' -name 'DisabledByDefault' -value 1 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\Multi-Protocol Unified Hello\Server' -name Enabled -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\Multi-Protocol Unified Hello\Server' -name 'DisabledByDefault' -value 1 -PropertyType 'DWord' -Force | Out-Null
Write-Host 'Multi-Protocol Unified Hello has been disabled.'
# Disable PCT 1.0
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\PCT 1.0\Client' -Force | Out-Null
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\PCT 1.0\Server' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\PCT 1.0\Client' -name Enabled -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\PCT 1.0\Client' -name 'DisabledByDefault' -value 1 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\PCT 1.0\Server' -name Enabled -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\PCT 1.0\Server' -name 'DisabledByDefault' -value 1 -PropertyType 'DWord' -Force | Out-Null
Write-Host 'PCT 1.0 has been disabled.'
# Disable SSL 2.0 (PCI Compliance)
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 2.0\Client' -Force | Out-Null
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 2.0\Server' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 2.0\Client' -name Enabled -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 2.0\Client' -name 'DisabledByDefault' -value 1 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 2.0\Server' -name Enabled -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 2.0\Server' -name 'DisabledByDefault' -value 1 -PropertyType 'DWord' -Force | Out-Null
Write-Host 'SSL 2.0 has been disabled.'
# Disable SSL 3.0 (PCI Compliance) and "enable" Poodle protection
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Client' -Force | Out-Null
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Server' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Client' -name Enabled -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Client' -name 'DisabledByDefault' -value 1 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Server' -name Enabled -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Server' -name 'DisabledByDefault' -value 1 -PropertyType 'DWord' -Force | Out-Null
Write-Host 'SSL 3.0 has been disabled.'
Write-Host ' '
Write-Host '--------------------------------------------------------------------------------'
Write-Host Write-Host -ForegroundColor Yellow 'Enabling and registering TLS and strong cyphers...'
Write-Host '--------------------------------------------------------------------------------'
# Add and Enable TLS 1.0 for client and server SCHANNEL communications
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Client' -Force | Out-Null
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Client' -name 'Enabled' -value '0xffffffff' -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Client' -name 'DisabledByDefault' -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server' -name 'Enabled' -value '0xffffffff' -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server' -name 'DisabledByDefault' -value 0 -PropertyType 'DWord' -Force | Out-Null
Write-Host 'Protocol: TLS 1.0 has been enabled.'
# Add and Enable TLS 1.1 for client and server SCHANNEL communications
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Client' -Force | Out-Null
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Client' -name 'Enabled' -value '0xffffffff' -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Client' -name 'DisabledByDefault' -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server' -name 'Enabled' -value '0xffffffff' -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server' -name 'DisabledByDefault' -value 0 -PropertyType 'DWord' -Force | Out-Null
Write-Host 'Protocol: TLS 1.1 has been enabled.'
# Add and Enable TLS 1.2 for client and server SCHANNEL communications
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client' -Force | Out-Null
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client' -name 'Enabled' -value '0xffffffff' -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client' -name 'DisabledByDefault' -value 0 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server' -name 'Enabled' -value '0xffffffff' -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server' -name 'DisabledByDefault' -value 0 -PropertyType 'DWord' -Force | Out-Null
Write-Host 'Protocol: TLS 1.2 has been enabled.'
# Re-create the ciphers key.
New-Item 'HKLM:SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers' -Force | Out-Null
# Disable insecure/weak ciphers.
$insecureCiphers = @(
'DES 56/56',
'NULL',
'RC2 128/128',
'RC2 40/128',
'RC2 56/128',
'RC4 40/128',
'RC4 56/128',
'RC4 64/128',
'RC4 128/128'
)
Foreach ($insecureCipher in $insecureCiphers) {
$key = (Get-Item HKLM:\).OpenSubKey('SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers', $true).CreateSubKey($insecureCipher)
$key.SetValue('Enabled', 0, 'DWord')
$key.close()
Write-Host "Weak cipher: $insecureCipher has been disabled."
}
# Enable new secure ciphers.
$secureCiphers = @(
'AES 128/128',
'AES 256/256',
'Triple DES 168/168'
)
Foreach ($secureCipher in $secureCiphers) {
$key = (Get-Item HKLM:\).OpenSubKey('SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers', $true).CreateSubKey($secureCipher)
New-ItemProperty -path "HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Ciphers\$secureCipher" -name 'Enabled' -value '0xffffffff' -PropertyType 'DWord' -Force | Out-Null
$key.close()
Write-Host "Strong cipher: $secureCipher has been enabled."
}
# Set hashes
New-Item 'HKLM:SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Hashes' -Force | Out-Null
New-Item 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Hashes\MD5' -Force | Out-Null
New-ItemProperty -path 'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Hashes\MD5' -name Enabled -value 0 -PropertyType 'DWord' -Force | Out-Null
$secureHashes = @(
'SHA',
'SHA256',
'SHA384',
'SHA512'
)
Foreach ($secureHash in $secureHashes) {
$key = (Get-Item HKLM:\).OpenSubKey('SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Hashes', $true).CreateSubKey($secureHash)
New-ItemProperty -path "HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Hashes\$secureHash" -name 'Enabled' -value '0xffffffff' -PropertyType 'DWord' -Force | Out-Null
$key.close()
Write-Host "Hash $secureHash has been enabled."
}
# Set KeyExchangeAlgorithms
New-Item 'HKLM:SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\KeyExchangeAlgorithms' -Force | Out-Null
$secureKeyExchangeAlgorithms = @(
'Diffie-Hellman',
'ECDH',
'PKCS'
)
Foreach ($secureKeyExchangeAlgorithm in $secureKeyExchangeAlgorithms) {
$key = (Get-Item HKLM:\).OpenSubKey('SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\KeyExchangeAlgorithms', $true).CreateSubKey($secureKeyExchangeAlgorithm)
New-ItemProperty -path "HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\KeyExchangeAlgorithms\$secureKeyExchangeAlgorithm" -name 'Enabled' -value '0xffffffff' -PropertyType 'DWord' -Force | Out-Null
$key.close()
Write-Host "KeyExchangeAlgorithm $secureKeyExchangeAlgorithm has been enabled."
}
# Set cipher suites order as secure as possible (Enables Perfect Forward Secrecy).
$os = Get-WmiObject -class Win32_OperatingSystem
if ([System.Version]$os.Version -lt [System.Version]'10.0') {
Write-Host '2008/2008R2/2012/2012R2.'
$cipherSuitesOrder = @(
'TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P521',
'TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384',
'TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256',
'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P521',
'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P384',
'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256',
'TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA_P521',
'TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA_P384',
'TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA_P256',
'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA_P521',
'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA_P384',
'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA_P256',
'TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384_P521',
'TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384_P384',
'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256_P521',
'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256_P384',
'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256_P256',
'TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384_P521',
'TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384_P384',
'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256_P521',
'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256_P384',
'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256_P256',
'TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA_P521',
'TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA_P384',
'TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA_P256',
'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA_P521',
'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA_P384',
'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA_P256',
'TLS_RSA_WITH_AES_256_GCM_SHA384',
'TLS_RSA_WITH_AES_128_GCM_SHA256',
'TLS_RSA_WITH_AES_256_CBC_SHA256',
'TLS_RSA_WITH_AES_128_CBC_SHA256',
'TLS_RSA_WITH_AES_256_CBC_SHA',
'TLS_RSA_WITH_AES_128_CBC_SHA',
'TLS_RSA_WITH_3DES_EDE_CBC_SHA'
)
} else {
Write-Host 'Windows 10/2016'
$cipherSuitesOrder = @(
'TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384',
'TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256',
'TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384',
'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256',
'TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA',
'TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA',
'TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384',
'TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256',
'TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384',
'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256',
'TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA',
'TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA',
'TLS_RSA_WITH_AES_256_GCM_SHA384',
'TLS_RSA_WITH_AES_128_GCM_SHA256',
'TLS_RSA_WITH_AES_256_CBC_SHA256',
'TLS_RSA_WITH_AES_128_CBC_SHA256',
'TLS_RSA_WITH_AES_256_CBC_SHA',
'TLS_RSA_WITH_AES_128_CBC_SHA',
'TLS_RSA_WITH_3DES_EDE_CBC_SHA'
)
}
$cipherSuitesAsString = [string]::join(',', $cipherSuitesOrder)
New-Item 'HKLM:\SOFTWARE\Policies\Microsoft\Cryptography\Configuration\SSL\00010002' -ErrorAction SilentlyContinue
New-ItemProperty -path 'HKLM:\SOFTWARE\Policies\Microsoft\Cryptography\Configuration\SSL\00010002' -name 'Functions' -value $cipherSuitesAsString -PropertyType 'String' -Force | Out-Null
Write-Host 'Enabling TLS 1.2 for .NET 3.5 and .NET 4.x'
New-ItemProperty -path "HKLM:\SOFTWARE\Microsoft\.NETFramework\v2.0.50727" -name 'SystemDefaultTlsVersions' -value 1 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path "HKLM:\SOFTWARE\Microsoft\.NETFramework\v4.0.30319" -name 'SystemDefaultTlsVersions' -value 1 -PropertyType 'DWord' -Force | Out-Null
if (Test-Path 'HKLM:\SOFTWARE\Wow6432Node') {
New-ItemProperty -path "HKLM:\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v2.0.50727" -name 'SystemDefaultTlsVersions' -value 1 -PropertyType 'DWord' -Force | Out-Null
New-ItemProperty -path "HKLM:\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319" -name 'SystemDefaultTlsVersions' -value 1 -PropertyType 'DWord' -Force | Out-Null
}
if ([System.Version](Get-Item $env:windir\system32\Webio.dll).VersionInfo.ProductVersion -lt [System.Version]"6.1.7601.23375" -or [System.Version](Get-Item $env:windir\system32\Winhttp.dll).VersionInfo.ProductVersion -lt [System.Version]"6.1.7601.23375") {
} else {
$defaultSecureProtocols = @(
'128', # TLS 1.0
'512', # TLS 1.1
'2048' # TLS 1.2
)
$defaultSecureProtocolsSum = ($defaultSecureProtocols | Measure-Object -Sum).Sum
Write-Host 'WinHTTP: Activate TLS 1.0, TLS 1.1 and TLS 1.2 only.'
New-ItemProperty -path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp' -name 'DefaultSecureProtocols' -value $defaultSecureProtocolsSum -PropertyType 'DWord' -Force | Out-Null
if (Test-Path 'HKLM:\SOFTWARE\Wow6432Node') {
New-ItemProperty -path 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp' -name 'DefaultSecureProtocols' -value $defaultSecureProtocolsSum -PropertyType 'DWord' -Force | Out-Null
}
}
Write-Host ' '
Write-Host '--------------------------------------------------------------------------------'
Write-Host ' '
Write-Host -ForegroundColor Red 'A reboot is required to apply and reflect changes. Restart now?'
Restart-Computer -Force -Confirm'