functions/User/Get-HawkUserInboxRule.ps1
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# Gets user inbox rules and looks for Investigate rules Function Get-HawkUserInboxRule { <# .SYNOPSIS Exports inbox rules for the specified user. .DESCRIPTION Gathers inbox rules for the provided uers. Looks for rules that forward or delete email and flag them for follow up .PARAMETER UserPrincipalName Single UPN of a user, commans seperated list of UPNs, or array of objects that contain UPNs. .OUTPUTS File: _Investigate_InboxRules.csv Path: \<User> Description: Inbox rules that delete or forward messages. File: InboxRules.csv Path: \<User> Description: All inbox rules that were found for the user. File: All_InboxRules.csv Path: \ Description: All users inbox rules. .EXAMPLE Get-HawkUserInboxRule -UserPrincipalName user@contoso.com Pulls all inbox rules for user@contoso.com and looks for Investigate rules. .EXAMPLE Get-HawkUserInboxRule -UserPrincipalName (get-mailbox -Filter {Customattribute1 -eq "C-level"}) Gathers inbox rules for all users who have "C-Level" set in CustomAttribute1 #> param ( [Parameter(Mandatory = $true)] [array]$UserPrincipalName ) Test-EXOConnection Send-AIEvent -Event "CmdRun" # Verify our UPN input [array]$UserArray = Test-UserObject -ToTest $UserPrincipalName foreach ($Object in $UserArray) { [string]$User = $Object.UserPrincipalName # Get Inbox rules Out-LogFile ("Gathering Inbox Rules: " + $User) -action $InboxRules = Get-InboxRule -mailbox $User if ($null -eq $InboxRules) { Out-LogFile "No Inbox Rules found" } else { # If the rules contains one of a number of known suspecious properties flag them foreach ($Rule in $InboxRules) { # Set our flag to false $Investigate = $false # Evaluate each of the properties that we know bad actors like to use and flip the flag if needed if ($Rule.DeleteMessage -eq $true) { $Investigate = $true } if (!([string]::IsNullOrEmpty($Rule.ForwardAsAttachmentTo))) { $Investigate = $true } if (!([string]::IsNullOrEmpty($Rule.ForwardTo))) { $Investigate = $true } if (!([string]::IsNullOrEmpty($Rule.RedirectTo))) { $Investigate = $true } # If we have set the Investigate flag then report it and output it to a seperate file if ($Investigate -eq $true) { Out-LogFile ("Possible Investigate inbox rule found ID:" + $Rule.Identity + " Rule:" + $Rule.Name) -notice $Rule | Out-MultipleFileType -FilePreFix "_Investigate_InboxRules" -user $user -csv -append -Notice } } # Output all of the inbox rules to a generic csv $InboxRules | Out-MultipleFileType -FilePreFix "InboxRules" -User $user -csv # Add all of the inbox rules to a generic collection file $InboxRules | Out-MultipleFileType -FilePrefix "All_InboxRules" -csv -Append } # Get any Sweep Rules # Suggested by Adonis Sardinas Out-LogFile ("Gathering Sweep Rules: " + $User) -action $SweepRules = Get-SweepRule -Mailbox $User if ($null -eq $SweeRules) { Out-LogFile "No Sweep Rules found" } else { # Output all rules to a user CSV $SweepRules | Out-MultipleFileType -FilePreFix "SweepRules" -user $User -csv # Add any found to the whole tenant list $SweepRules | Out-MultipleFileType -FilePreFix "All_SweepRules" -csv -append } } } |