tests/Test-NotifyMalwareInternal.ps1

function Test-NotifyMalwareInternal {
    [CmdletBinding()]
    [OutputType([CISAuditResult])]
    param (
        # Aligned
        # Parameters can be added if needed
    )

    begin {
        <#
        # Conditions for 2.1.3 (L1) Ensure notifications for internal users sending malware is Enabled
        #
        # Validate test for a pass:
        # - Confirm that the automated test results align with the manual audit steps outlined in the CIS benchmark.
        # - Specific conditions to check:
        # - Condition A: Notifications for internal users sending malware are enabled in the Microsoft 365 Security & Compliance Center.
        # - Condition B: Using PowerShell, the `NotifyInternal` property in the anti-malware policy is set to `True` and includes at least one valid email address for notifications.
        #
        # Validate test for a fail:
        # - Confirm that the failure conditions in the automated test are consistent with the manual audit results.
        # - Specific conditions to check:
        # - Condition A: Notifications for internal users sending malware are not enabled in the Microsoft 365 Security & Compliance Center.
        # - Condition B: Using PowerShell, the `NotifyInternal` property in the anti-malware policy is set to `False` or does not include any valid email addresses for notifications.
        #>


        # Dot source the class script if necessary
        #. .\source\Classes\CISAuditResult.ps1
        # Initialization code, if needed
        $recnum = "2.1.3"
    }

    process {
        try {
            # 2.1.3 Ensure notifications for internal users sending malware is Enabled

            # Retrieve all 'Custom' malware filter policies and check notification settings
            $malwareNotifications = Get-MalwareFilterPolicy | Where-Object { $_.RecommendedPolicyType -eq 'Custom' }

            # Condition B: Using PowerShell, the `NotifyInternal` property in the anti-malware policy is set to `True` and includes at least one valid email address for notifications.
            $policiesToReport = @()
            foreach ($policy in $malwareNotifications) {
                if ($policy.EnableInternalSenderAdminNotifications -ne $true) {
                    $policiesToReport += "$($policy.Identity): Notifications Disabled"
                }
            }

            # Determine the result based on the presence of custom policies without notifications
            $result = $policiesToReport.Count -eq 0

            # Prepare failure reasons and details based on compliance
            $failureReasons = if ($result) {
                "N/A"
            }
            else {
                # Condition A: Notifications for internal users sending malware are not enabled in the Microsoft 365 Security & Compliance Center.
                "Some custom policies do not have notifications for internal users sending malware enabled."
            }

            $details = if ($result) {
                "All custom malware policies have notifications enabled."
            }
            else {
                "Misconfigured Policies: $($policiesToReport -join ', ')"
            }

            # Create and populate the CISAuditResult object
            $params = @{
                Rec           = $recnum
                Result        = $result
                Status        = if ($result) { "Pass" } else { "Fail" }
                Details       = $details
                FailureReason = $failureReasons
            }
            $auditResult = Initialize-CISAuditResult @params
        }
        catch {
            Write-Error "An error occurred during the test: $_"

            # Retrieve the description from the test definitions
            $testDefinition = $script:TestDefinitionsObject | Where-Object { $_.Rec -eq $recnum }
            $description = if ($testDefinition) { $testDefinition.RecDescription } else { "Description not found" }

            $script:FailedTests.Add([PSCustomObject]@{ Rec = $recnum; Description = $description; Error = $_ })

            # Call Initialize-CISAuditResult with error parameters
            $auditResult = Initialize-CISAuditResult -Rec $recnum -Failure
        }
    }

    end {
        # Return the audit result
        return $auditResult
    }
}