545 lines
30 KiB
PowerShell
545 lines
30 KiB
PowerShell
<#
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.SYNOPSIS
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This is a sample Private function only visible within the module.
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.DESCRIPTION
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This sample function is not exported to the module and only return the data passed as parameter.
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.EXAMPLE
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$null = Get-CISExoOutput -PrivateData 'NOTHING TO SEE HERE'
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.PARAMETER PrivateData
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The PrivateData parameter is what will be returned without transformation.
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#>
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function Get-CISExoOutput {
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[cmdletBinding()]
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param(
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[Parameter(Mandatory = $true)]
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[String]$Rec
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)
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begin {
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# Begin Block #
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<#
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# Tests
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1.2.2
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1.3.3
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1.3.6
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2.1.1
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2.1.2
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2.1.3
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2.1.4
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2.1.5
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2.1.6
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2.1.7
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2.1.9
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3.1.1
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6.1.1
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6.1.2
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6.1.3
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6.2.1
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6.2.2
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6.2.3
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6.3.1
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6.5.1
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6.5.2
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6.5.3
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8.6.1
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# Test number array
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$testNumbers = @('1.2.2', '1.3.3', '1.3.6', '2.1.1', '2.1.2', '2.1.3', '2.1.4', '2.1.5', '2.1.6', '2.1.7', '2.1.9', '3.1.1', '6.1.1', '6.1.2', '6.1.3', '6.2.1', '6.2.2', '6.2.3', '6.3.1', '6.5.1', '6.5.2', '6.5.3', '8.6.1')
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#>
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}
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process {
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try {
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Write-Verbose "Get-CISExoOutput: Retuning data for Rec: $Rec"
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switch ($Rec) {
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'1.2.2' {
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# Test-BlockSharedMailboxSignIn.ps1
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$MBX = Get-EXOMailbox -RecipientTypeDetails SharedMailbox
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# [object[]]
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# $MBX mock object:
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<#
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$MBX = @(
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[PSCustomObject]@{
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UserPrincipalName = "SMBuser1@domain.com"
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ExternalDirectoryObjectId = "123e4567-e89b-12d3-a456-426614174000"
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},
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[PSCustomObject]@{
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UserPrincipalName = "SMBuser2@domain.com"
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ExternalDirectoryObjectId = "987e6543-21ba-12d3-a456-426614174000"
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},
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[PSCustomObject]@{
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UserPrincipalName = "SMBuser3@domain.com"
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ExternalDirectoryObjectId = "abcddcba-98fe-76dc-a456-426614174000"
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}
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)
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#>
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return $MBX.ExternalDirectoryObjectId
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}
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'1.3.3' {
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# Test-ExternalSharingCalendars.ps1
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# Step: Retrieve sharing policies related to calendar sharing
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# $sharingPolicies Mock Object
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<#
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$sharingPolicies = [PSCustomObject]@{
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Name = "Default Sharing Policy"
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Domains = @("Anonymous:CalendarSharingFreeBusySimple")
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Enabled = $true
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Default = $true
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}
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#>
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$sharingPolicies = Get-SharingPolicy | Where-Object { $_.Domains -like '*CalendarSharing*' }
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# [psobject[]]
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return $sharingPolicies
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}
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'1.3.6' {
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# Test-CustomerLockbox.ps1
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# Step: Retrieve the organization configuration (Condition C: Pass/Fail)
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# $orgConfig Mock Object:
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<#
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# return $orgConfig
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$orgConfig = [PSCustomObject]@{
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CustomerLockBoxEnabled = $true
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}
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#>
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$orgConfig = Get-OrganizationConfig | Select-Object CustomerLockBoxEnabled
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$customerLockboxEnabled = $orgConfig.CustomerLockBoxEnabled
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# [bool]
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return $customerLockboxEnabled
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}
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'2.1.1' {
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# Test-SafeLinksOfficeApps.ps1
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if (Get-Command Get-SafeLinksPolicy -ErrorAction SilentlyContinue) {
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# 2.1.1 (L2) Ensure Safe Links for Office Applications is Enabled
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# Retrieve all Safe Links policies
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# $policies Mock Object:
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<#
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$policies = @(
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[PSCustomObject]@{
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Name = "PolicyOne"
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EnableSafeLinksForEmail = $true
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EnableSafeLinksForTeams = $true
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EnableSafeLinksForOffice = $true
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TrackClicks = $true
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AllowClickThrough = $false
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},
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[PSCustomObject]@{
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Name = "PolicyTwo"
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EnableSafeLinksForEmail = $true
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EnableSafeLinksForTeams = $true
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EnableSafeLinksForOffice = $true
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TrackClicks = $true
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AllowClickThrough = $true
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},
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[PSCustomObject]@{
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Name = "PolicyThree"
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EnableSafeLinksForEmail = $true
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EnableSafeLinksForTeams = $true
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EnableSafeLinksForOffice = $true
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TrackClicks = $true
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AllowClickThrough = $false
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}
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)
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#>
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$policies = Get-SafeLinksPolicy
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# Initialize the details collection
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$misconfiguredDetails = @()
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foreach ($policy in $policies) {
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# Get the detailed configuration of each policy
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$policyDetails = $policy #Get-SafeLinksPolicy -Identity $policy.Name
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# Check each required property and record failures
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# Condition A: Checking policy settings
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$failures = @()
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if ($policyDetails.EnableSafeLinksForEmail -ne $true) { $failures += 'EnableSafeLinksForEmail: False' } # Email: On
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if ($policyDetails.EnableSafeLinksForTeams -ne $true) { $failures += 'EnableSafeLinksForTeams: False' } # Teams: On
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if ($policyDetails.EnableSafeLinksForOffice -ne $true) { $failures += 'EnableSafeLinksForOffice: False' } # Office 365 Apps: On
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if ($policyDetails.TrackClicks -ne $true) { $failures += 'TrackClicks: False' } # Click protection settings: On
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if ($policyDetails.AllowClickThrough -ne $false) { $failures += 'AllowClickThrough: True' } # Do not track when users click safe links: Off
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# Only add details for policies that have misconfigurations
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if ($failures.Count -gt 0) {
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$misconfiguredDetails += "Policy: $($policy.Name); Failures: $($failures -join ', ')"
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}
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}
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# [object[]]
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return $misconfiguredDetails
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}
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else {
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return 1
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}
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}
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'2.1.2' {
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# Test-CommonAttachmentFilter.ps1
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# 2.1.2 (L1) Ensure the Common Attachment Types Filter is enabled
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# Condition A: The Common Attachment Types Filter is enabled in the Microsoft 365 Security & Compliance Center.
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# Condition B: Using Exchange Online PowerShell, verify that the `EnableFileFilter` property of the default malware filter policy is set to `True`.
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# Retrieve the attachment filter policy
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# $attachmentFilter Mock Object
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<#
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$attachmentFilter = [PSCustomObject]@{
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EnableFileFilter = $true
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}
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#>
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$attachmentFilter = Get-MalwareFilterPolicy -Identity Default | Select-Object EnableFileFilter
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$result = $attachmentFilter.EnableFileFilter
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# [bool]
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return $result
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}
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'2.1.3' {
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# Test-NotifyMalwareInternal.ps1
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# 2.1.3 Ensure notifications for internal users sending malware is Enabled
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# Retrieve all 'Custom' malware filter policies and check notification settings
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# $malwareNotifications Mock Object
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<#
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$malwareNotifications = @(
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[PSCustomObject]@{
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Identity = "Default"
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EnableInternalSenderAdminNotifications = $true
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RecommendedPolicyType = "Custom"
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},
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[PSCustomObject]@{
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Identity = "Anti-malware-Policy"
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EnableInternalSenderAdminNotifications = $true
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RecommendedPolicyType = "Custom"
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}
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)
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#>
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$malwareNotifications = Get-MalwareFilterPolicy | Where-Object { $_.RecommendedPolicyType -eq 'Custom' }
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# [object[]]
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return $malwareNotifications
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}
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'2.1.4' {
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# Test-SafeAttachmentsPolicy.ps1
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if (Get-Command Get-SafeAttachmentPolicy -ErrorAction SilentlyContinue) {
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# Retrieve all Safe Attachment policies where Enable is set to True
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# Check if ErrorAction needed below
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# $safeAttachmentPolicies Mock Object:
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<#
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$safeAttachmentPolicies = @(
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[PSCustomObject]@{
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Policy = "Strict Preset Security Policy"
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Action = "Block"
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QuarantineTag = "AdminOnlyAccessPolicy"
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Redirect = $false
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Enabled = $true
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}
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)
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#>
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$safeAttachmentPolicies = Get-SafeAttachmentPolicy -ErrorAction SilentlyContinue | Where-Object { $_.Enable -eq $true }
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$safeAttachmentRules = Get-SafeAttachmentRule
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# [object[]]
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return $safeAttachmentPolicies, $safeAttachmentRules
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else {
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return 1, 1
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}
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}
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}
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'2.1.5' {
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# Test-SafeAttachmentsTeams.ps1
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if (Get-Command Get-AtpPolicyForO365 -ErrorAction SilentlyContinue) {
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# 2.1.5 (L2) Ensure Safe Attachments for SharePoint, OneDrive, and Microsoft Teams is Enabled
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# Retrieve the ATP policies for Office 365 and check Safe Attachments settings
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$atpPolicies = Get-AtpPolicyForO365
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# Check if the required ATP policies are enabled
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# $atpPolicyResult Mock Object:
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<#
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$atpPolicyResult = @(
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[PSCustomObject]@{
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Name = "Default"
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EnableATPForSPOTeamsODB = $true
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EnableSafeDocs = $true
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AllowSafeDocsOpen = $false
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}
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)
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#>
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$atpPolicyResult = $atpPolicies | Where-Object {
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$_.EnableATPForSPOTeamsODB -eq $true -and
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$_.EnableSafeDocs -eq $true -and
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$_.AllowSafeDocsOpen -eq $false
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}
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# [psobject[]]
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return $atpPolicyResult
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}
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else {
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return 1
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}
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}
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'2.1.6' {
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# Test-SpamPolicyAdminNotify.ps1
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# Retrieve the hosted outbound spam filter policies
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<#
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# Mock data representing multiple spam filter policies
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$spamPolicies = @(
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[PSCustomObject]@{
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Name = "Default"
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IsDefault = $true
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NotifyOutboundSpam = $true
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BccSuspiciousOutboundMail = $true
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NotifyOutboundSpamRecipients = "admin@example.com"
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BccSuspiciousOutboundAdditionalRecipients = "bccadmin@example.com"
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},
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[PSCustomObject]@{
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Name = "Custom Policy 1"
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IsDefault = $false
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NotifyOutboundSpam = $false
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BccSuspiciousOutboundMail = $true
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NotifyOutboundSpamRecipients = ""
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BccSuspiciousOutboundAdditionalRecipients = ""
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},
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[PSCustomObject]@{
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Name = "Custom Policy 2"
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IsDefault = $false
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NotifyOutboundSpam = $true
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BccSuspiciousOutboundMail = $false
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NotifyOutboundSpamRecipients = "notify@example.com"
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BccSuspiciousOutboundAdditionalRecipients = "bccnotify@example.com"
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}
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)
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#>
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$spamPolicies = Get-HostedOutboundSpamFilterPolicy
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return $spamPolicies
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}
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'2.1.7' {
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# v4 needs same info.
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# Test-AntiPhishingPolicy.ps1
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<#
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$antiPhishPolicies = @(
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[PSCustomObject]@{
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Identity = "Strict Preset Security Policy"
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Enabled = $true
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PhishThresholdLevel = 4
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EnableMailboxIntelligenceProtection = $true
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EnableMailboxIntelligence = $true
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EnableSpoofIntelligence = $true
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TargetedUsersToProtect = "John Doe;jdoe@contoso.net, Jane Does;janedoe@contoso.net"
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},
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[PSCustomObject]@{
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Identity = "Office365 AntiPhish Default"
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Enabled = $true
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PhishThresholdLevel = 2
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EnableMailboxIntelligenceProtection = $true
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EnableMailboxIntelligence = $true
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EnableSpoofIntelligence = $true
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TargetedUsersToProtect = $null # Assuming it targets all users as it's the default
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},
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[PSCustomObject]@{
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Identity = "Admin"
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Enabled = $true
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PhishThresholdLevel = 2
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EnableMailboxIntelligenceProtection = $true
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EnableMailboxIntelligence = $true
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EnableSpoofIntelligence = $true
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TargetedUsersToProtect = $null # Assuming it targets all users
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},
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[PSCustomObject]@{
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Identity = "Standard Preset Security Policy"
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Enabled = $true
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PhishThresholdLevel = 3
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EnableMailboxIntelligenceProtection = $true
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EnableMailboxIntelligence = $true
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EnableSpoofIntelligence = $true
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TargetedUsersToProtect = $null # Assuming it targets all users
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}
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)
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#>
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$antiPhishPolicies = Get-AntiPhishPolicy
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if ($script:Version400) {
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Write-Verbose 'Retrieving associated AntiPhishRules...'
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$antiPhishRules = Get-AntiPhishRule
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return $antiPhishPolicies, $antiPhishRules
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}
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else {
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return $antiPhishPolicies
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}
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}
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'2.1.9' {
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# Test-EnableDKIM.ps1
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# 2.1.9 (L1) Ensure DKIM is enabled for all Exchange Online Domains
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# Retrieve DKIM configuration for all domains
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$dkimConfig = Get-DkimSigningConfig | Select-Object Domain, Enabled
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# [object[]]
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return $dkimConfig
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}
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'2.1.11' {
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# Test-CommonAttachmentFilter.ps1 for Comprehensive Attachment Filtering
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Write-Verbose 'Retrieving Malware Filter Policies, Rules, and Extensions for 2.1.11...'
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# Retrieve all malware filter policies
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$malwarePolicies = Get-MalwareFilterPolicy
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# Retrieve all malware filter rules
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$malwareRules = Get-MalwareFilterRule
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# Predefined list of L2 extensions from the benchmark
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$L2Extensions = @(
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'7z', 'a3x', 'ace', 'ade', 'adp', 'ani', 'app', 'appinstaller',
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'applescript', 'application', 'appref-ms', 'appx', 'appxbundle', 'arj',
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'asd', 'asx', 'bas', 'bat', 'bgi', 'bz2', 'cab', 'chm', 'cmd', 'com',
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'cpl', 'crt', 'cs', 'csh', 'daa', 'dbf', 'dcr', 'deb',
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'desktopthemepackfile', 'dex', 'diagcab', 'dif', 'dir', 'dll', 'dmg',
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'doc', 'docm', 'dot', 'dotm', 'elf', 'eml', 'exe', 'fxp', 'gadget', 'gz',
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'hlp', 'hta', 'htc', 'htm', 'htm', 'html', 'html', 'hwpx', 'ics', 'img',
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'inf', 'ins', 'iqy', 'iso', 'isp', 'jar', 'jnlp', 'js', 'jse', 'kext',
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'ksh', 'lha', 'lib', 'library-ms', 'lnk', 'lzh', 'macho', 'mam', 'mda',
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'mdb', 'mde', 'mdt', 'mdw', 'mdz', 'mht', 'mhtml', 'mof', 'msc', 'msi',
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'msix', 'msp', 'msrcincident', 'mst', 'ocx', 'odt', 'ops', 'oxps', 'pcd',
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'pif', 'plg', 'pot', 'potm', 'ppa', 'ppam', 'ppkg', 'pps', 'ppsm', 'ppt',
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'pptm', 'prf', 'prg', 'ps1', 'ps11', 'ps11xml', 'ps1xml', 'ps2',
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'ps2xml', 'psc1', 'psc2', 'pub', 'py', 'pyc', 'pyo', 'pyw', 'pyz',
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'pyzw', 'rar', 'reg', 'rev', 'rtf', 'scf', 'scpt', 'scr', 'sct',
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'searchConnector-ms', 'service', 'settingcontent-ms', 'sh', 'shb', 'shs',
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'shtm', 'shtml', 'sldm', 'slk', 'so', 'spl', 'stm', 'svg', 'swf', 'sys',
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'tar', 'theme', 'themepack', 'timer', 'uif', 'url', 'uue', 'vb', 'vbe',
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'vbs', 'vhd', 'vhdx', 'vxd', 'wbk', 'website', 'wim', 'wiz', 'ws', 'wsc',
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'wsf', 'wsh', 'xla', 'xlam', 'xlc', 'xll', 'xlm', 'xls', 'xlsb', 'xlsm',
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'xlt', 'xltm', 'xlw', 'xnk', 'xps', 'xsl', 'xz', 'z'
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)
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# Return all required objects for evaluation
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return $malwarePolicies, $malwareRules, $L2Extensions
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}
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'2.1.12' {
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# Placeholder - Test-ConnectionFilterIPAllowList
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}
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'2.1.13' {
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# Placeholder - Test-ConnectionFilterSafeList
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}
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'2.1.14' {
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# Placeholder - Test-InboundAntiSpamPolicies
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}
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'3.1.1' {
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# Test-AuditLogSearch.ps1
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# 3.1.1 (L1) Ensure Microsoft 365 audit log search is Enabled
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# Retrieve the audit log configuration
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$auditLogConfig = Get-AdminAuditLogConfig | Select-Object UnifiedAuditLogIngestionEnabled
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#
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$auditLogResult = $auditLogConfig.UnifiedAuditLogIngestionEnabled
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# [bool]
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return $auditLogResult
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}
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'6.1.1' {
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# Test-AuditDisabledFalse.ps1
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# 6.1.1 (L1) Ensure 'AuditDisabled' organizationally is set to 'False'
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# Retrieve the AuditDisabled configuration (Condition B)
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$auditDisabledConfig = Get-OrganizationConfig | Select-Object AuditDisabled
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# [bool]
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$auditNotDisabled = -not $auditDisabledConfig.AuditDisabled
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return $auditNotDisabled
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}
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'6.1.2' {
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# Test-MailboxAuditingE3.ps1
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$mailboxes = Get-EXOMailbox -PropertySets Audit
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# [object[]]
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return $mailboxes
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}
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'6.1.3' {
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# Test-MailboxAuditingE5.ps1
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$mailboxes = Get-EXOMailbox -PropertySets Audit
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# [object[]]
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return $mailboxes
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}
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'6.1.4' {
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# Placeholder - Test-AuditBypassEnabled
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}
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'6.2.1' {
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# Test-BlockMailForwarding.ps1
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# 6.2.1 (L1) Ensure all forms of mail forwarding are blocked and/or disabled
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# Step 1: Retrieve the transport rules that redirect messages
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$transportRules = Get-TransportRule | Where-Object { $null -ne $_.RedirectMessageTo }
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if ($null -eq $transportRules) {
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$transportRules = 1
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}
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# Step 2: Check all anti-spam outbound policies
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$outboundSpamPolicies = Get-HostedOutboundSpamFilterPolicy
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$nonCompliantSpamPolicies = $outboundSpamPolicies | Where-Object { $_.AutoForwardingMode -ne 'Off' }
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return $transportRules, $nonCompliantSpamPolicies
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}
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'6.2.2' {
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# Test-NoWhitelistDomains.ps1
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# 6.2.2 (L1) Ensure mail transport rules do not whitelist specific domains
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# Retrieve transport rules that whitelist specific domains
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# Condition A: Checking for transport rules that whitelist specific domains
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# [object[]]
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$whitelistedRules = Get-TransportRule | Where-Object { $_.SetSCL -eq -1 -and $null -ne $_.SenderDomainIs }
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return $whitelistedRules
|
|
}
|
|
'6.2.3' {
|
|
# Test-IdentifyExternalEmail.ps1
|
|
# 6.2.3 (L1) Ensure email from external senders is identified
|
|
# Retrieve external sender tagging configuration
|
|
# [object[]]
|
|
$externalInOutlook = Get-ExternalInOutlook
|
|
return $externalInOutlook
|
|
}
|
|
'6.3.1' {
|
|
# Test-RestrictOutlookAddins.ps1
|
|
# 6.3.1 (L2) Ensure users installing Outlook add-ins is not allowed
|
|
$customPolicyFailures = @()
|
|
# Check all mailboxes for custom policies with unallowed add-ins
|
|
$roleAssignmentPolicies = Get-EXOMailbox | Select-Object -Unique RoleAssignmentPolicy
|
|
if ($roleAssignmentPolicies.RoleAssignmentPolicy) {
|
|
foreach ($policy in $roleAssignmentPolicies) {
|
|
if ($policy.RoleAssignmentPolicy) {
|
|
$rolePolicyDetails = Get-RoleAssignmentPolicy -Identity $policy.RoleAssignmentPolicy
|
|
$foundRoles = $rolePolicyDetails.AssignedRoles | Where-Object { $_ -in $relevantRoles }
|
|
# Condition B: Using PowerShell, verify that MyCustomApps, MyMarketplaceApps, and MyReadWriteMailboxApps are not assigned to users.
|
|
if ($foundRoles) {
|
|
$customPolicyFailures += "Policy: $($policy.RoleAssignmentPolicy): Roles: $($foundRoles -join ', ')"
|
|
}
|
|
}
|
|
}
|
|
}
|
|
# Check Default Role Assignment Policy
|
|
$defaultPolicy = Get-RoleAssignmentPolicy 'Default Role Assignment Policy'
|
|
return $customPolicyFailures, $defaultPolicy
|
|
}
|
|
'6.5.1' {
|
|
# Test-ModernAuthExchangeOnline.ps1
|
|
# Ensuring the ExchangeOnlineManagement module is available
|
|
# 6.5.1 (L1) Ensure modern authentication for Exchange Online is enabled
|
|
# Check modern authentication setting in Exchange Online configuration (Condition A and B)
|
|
$orgConfig = Get-OrganizationConfig | Select-Object -Property Name, OAuth2ClientProfileEnabled
|
|
return $orgConfig
|
|
}
|
|
'6.5.2' {
|
|
# Test-MailTipsEnabled.ps1
|
|
# 6.5.2 (L2) Ensure MailTips are enabled for end users
|
|
# Retrieve organization configuration for MailTips settings
|
|
# [object]
|
|
$orgConfig = Get-OrganizationConfig | Select-Object MailTipsAllTipsEnabled, MailTipsExternalRecipientsTipsEnabled, MailTipsGroupMetricsEnabled, MailTipsLargeAudienceThreshold
|
|
return $orgConfig
|
|
}
|
|
'6.5.3' {
|
|
# Test-RestrictStorageProvidersOutlook.ps1
|
|
# 6.5.3 (L2) Ensure additional storage providers are restricted in Outlook on the web
|
|
# Retrieve all OwaMailbox policies
|
|
# [object[]]
|
|
$owaPolicies = Get-OwaMailboxPolicy
|
|
return $owaPolicies
|
|
}
|
|
'8.6.1' {
|
|
# Test-ReportSecurityInTeams.ps1
|
|
# 8.6.1 (L1) Ensure users can report security concerns in Teams
|
|
# Retrieve the necessary settings for Teams and Exchange Online
|
|
# Condition B: Verify that 'Monitor reported messages in Microsoft Teams' is checked in the Microsoft 365 Defender portal.
|
|
# Condition C: Ensure the 'Send reported messages to' setting in the Microsoft 365 Defender portal is set to 'My reporting mailbox only' with the correct report email addresses.
|
|
# $ReportSubmissionPolicy Mock Object
|
|
<#
|
|
$ReportSubmissionPolicy = [PSCustomObject]@{
|
|
ReportJunkToCustomizedAddress = $true
|
|
ReportNotJunkToCustomizedAddress = $true
|
|
ReportPhishToCustomizedAddress = $true
|
|
ReportJunkAddresses = @('security@example.com')
|
|
ReportNotJunkAddresses = @('security@example.com')
|
|
ReportPhishAddresses = @('security@example.com')
|
|
ReportChatMessageEnabled = $false
|
|
ReportChatMessageToCustomizedAddressEnabled = $false
|
|
}
|
|
#>
|
|
$ReportSubmissionPolicy = Get-ReportSubmissionPolicy | Select-Object -Property ReportJunkToCustomizedAddress, ReportNotJunkToCustomizedAddress, ReportPhishToCustomizedAddress, ReportJunkAddresses, ReportNotJunkAddresses, ReportPhishAddresses, ReportChatMessageEnabled, ReportChatMessageToCustomizedAddressEnabled
|
|
return $ReportSubmissionPolicy
|
|
}
|
|
default { throw "No match found for test: $Rec" }
|
|
}
|
|
}
|
|
catch {
|
|
throw "Get-CISExoOutput: `n$_"
|
|
}
|
|
}
|
|
end {
|
|
Write-Verbose "Retuning data for Rec: $Rec"
|
|
}
|
|
} # end function Get-CISExoOutput
|
|
|