Checks/check-ORCA109.ps1
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<#
ORCA-109 Checks if the allowed senders list is empty in Anti-spam policies #> using module "..\ORCA.psm1" class ORCA109 : ORCACheck { <# CONSTRUCTOR with Check Header Data #> ORCA109() { $this.Control="ORCA-109" $this.Area="Anti-Spam Policies" $this.Name="Allowed Senders" $this.PassText="Senders are not being whitelisted in an unsafe manner" $this.FailRecommendation="Remove whitelisting on senders" $this.Importance="Emails coming from whitelisted senders bypass several layers of protection within Exchange Online Protection. If senders are whitelisted, they are open to being spoofed from malicious actors." $this.ExpandResults=$True $this.ItemName="Anti-Spam Policy" $this.DataType="Allowed Senders" $this.ChiValue=[ORCACHI]::High $this.Links= @{ "Security & Compliance Center - Anti-spam settings"="https://protection.office.com/antispam" "Use Anti-Spam Policy Sender/Domain Allow lists"="https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/create-safe-sender-lists-in-office-365#use-anti-spam-policy-senderdomain-allow-lists" "Recommended settings for EOP and Office 365 ATP security"="https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/recommended-settings-for-eop-and-office365-atp#anti-spam-anti-malware-and-anti-phishing-protection-in-eop" } } <# RESULTS #> GetResults($Config) { ForEach($Policy in $Config["HostedContentFilterPolicy"]) { # Check objects $ConfigObject = [ORCACheckConfig]::new() $ConfigObject.ConfigItem=$($Policy.Name) $ConfigObject.ConfigData=$($Policy.AllowedSenders) If(($Policy.AllowedSenders).Count -eq 0) { $ConfigObject.SetResult([ORCAConfigLevel]::Standard,"Pass") } Else { $ConfigObject.SetResult([ORCAConfigLevel]::Standard,"Fail") } # Add config to check $this.AddConfig($ConfigObject) } } } |