AutoSpamEmailScan.ps1
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<#PSScriptInfo .VERSION 5.0.0 .GUID 134de175-8fd8-4938-9812-053ba39eed83 .AUTHOR HAO BAN/banhao@gmail.com .COMPANYNAME .COPYRIGHT .TAGS .LICENSEURI https://github.com/banhao/AutoSpamEmailScan/blob/master/LICENSE .PROJECTURI .ICONURI .EXTERNALMODULEDEPENDENCIES Before you run the script Install the Exchange Web Services Managed API 2.2. https://www.microsoft.com/en-us/download/details.aspx?id=42951 .REQUIREDSCRIPTS .EXTERNALSCRIPTDEPENDENCIES .RELEASENOTES Creation Date: <04/28/2022> Purpose/Change: Instead the "Cisco SecureX Investigation Module" with the "secureX.ps1" Add "MineMeld_Indicator.ps1" Add ESA_Spam_Block.ps1 Remove "checkphish.ai" module Creation Date: <09/20/2021> Purpose/Change: Fixed Function "ESASpamQuarantine" a small bug. Creation Date: <07/08/2021> Purpose/Change: add Cisco SecureX Investigation Module Creation Date: <05/26/2021> Purpose/Change: Fixed some bugs Creation Date: <05/19/2021> Purpose/Change: Add "BlockedMailSelfRelease" function. If you donnot have ESA/SMA or donott want to use ESA/SMA API to block SPAM sender or release blocked emails from quarantine then please setup "ENABLEESASPAMBL" and "ENABLESELFRELEASE" as "False" in init.conf Creation Date: <05/13/2021> Purpose/Change: Add "slblconfig EXPORT" after update the Cisco Email Security Appliance Spam Quarantine Blacklist.(related to Cisco Bug CSCvx12488) ssh PRIVATE KEY must be save in "c:\users\<username>\.ssh\" folder. ".ssh" folder must disable "inheritance" and manually grant "local\SYSTEM" group, "local\Administrators" group "full control" privilege, and current user "read only" privilege. Creation Date: <04/05/2021> Purpose/Change: Optimize function CheckRedirectedURL{} Creation Date: <03/25/2021> Purpose/Change: Update function CheckRedirectedURL{} Creation Date: <03/19/2021> Purpose/Change: Add a new module for Cisco Email Security Appliance Spam Quarantine Blacklist. Creation Date: <11/10/2020> Purpose/Change: Move emails to sub-folder when after the checking. Creation Date: <04/03/2020> Purpose/Change: Optimize the parameters setting. Creation Date: <04/02/2020> Purpose/Change: Add new feature to let the use input the credential just chose "N" when prompt "salt is empty". Add SystemException, fix the broken of the system error. Creation Date: <03/10/2020> Purpose/Change: Add a new Function CheckRedirectedURL, this feature is used to detect URLs that try to escape the scan. Change "function Submit-URL-Virustotal" to use the VirusTotal API V3 Creation Date: <02/11/2020> Purpose/Change: Add checkphish.ai API limit error Creation Date: <01/22/2020> Purpose/Change: Add a new Function checkphish.ai Creation Date: <10/21/2019> Purpose/Change: One funcation name was changed but calls the old name in the program. Update the Bytescout.PDF2HTML.dll to version 10.6.0.3667. It's still a trial version and will expire after 90 days. If you see this error: -------------------------------------------------------------------------------------- "new-object : Exception calling ".ctor" with "0" argument(s): "Trial period expired." + $extractor = new-object Bytescout.PDF2HTML.HTMLExtractor -------------------------------------------------------------------------------------- That means the DLL file has been expired. .PRIVATEDATA .DESCRIPTION AutoSpamEmailScan.ps1 is used to monitor a specific mailbox that in enterprise users can forward suspicious spam emails to a specific mailbox. This PowerShell script can monitor the mailbox for any unread emails, grab the URLs and attachments from the emails and submit to virustotal.com, urlscan.io, Google safe browsing and OPSWAT. Script also can extract URLs from a pdf file. After the scan finished, script can generate HTML format scan report and auto reply to the senders. Script can be run once or loop interval, if in the init.conf is 0 means script will only run one time else the number is the loop interval seconds. Visit https://github.com/banhao/AutoSpamEmailScan to get the init.conf and Bytescout.PDF2HTML.dll, this dll file is used to convert PDF to HTML. Please check the License before you download this script, if you don't agree with the License please don't download and use this script. https://github.com/banhao/AutoSpamEmailScan/blob/master/LICENSE The Password is base64 encoded and saved in init.conf, following is the example about how to genertae the encoded password: "JkPgsiG9Zh0XCvk" is the password. "yp9P7" is the salt. make sure salt is the unique string that can't have the same pattern in the password. Insert the salt into password where ever you want: yp9P7JkPgsiG9Zh0XCvk, JkPgsiG9Zh0XCvkyp9P7, JkPgyp9P7siG9Zh0XCvk, JkPgsiG9Zh0XCyp9P7vk, ...... all these are legitimate. Generate the base64 encoded string: [Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes("yp9P7JkPgsiG9Zh0XCvk")) eQBwADkAUAA3AEoAawBQAGcAcwBpAEcAOQBaAGgAMABYAEMAdgBrAA== [Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes("JkPgsiG9Zh0XCvkyp9P7")) SgBrAFAAZwBzAGkARwA5AFoAaAAwAFgAQwB2AGsAeQBwADkAUAA3AA== [Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes("JkPgyp9P7siG9Zh0XCvk")) SgBrAFAAZwB5AHAAOQBQADcAcwBpAEcAOQBaAGgAMABYAEMAdgBrAA== [Convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes("JkPgsiG9Zh0XCyp9P7vk")) SgBrAFAAZwBzAGkARwA5AFoAaAAwAFgAQwB5AHAAOQBQADcAdgBrAA== Save the encoded string in the init.conf file. Decode the encoded string: [System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String("eQBwADkAUAA3AEoAawBQAGcAcwBpAEcAOQBaAGgAMABYAEMAdgBrAA==")) yp9P7JkPgsiG9Zh0XCvk [System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String("SgBrAFAAZwBzAGkARwA5AFoAaAAwAFgAQwB2AGsAeQBwADkAUAA3AA==")) JkPgsiG9Zh0XCvkyp9P7 [System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String("SgBrAFAAZwB5AHAAOQBQADcAcwBpAEcAOQBaAGgAMABYAEMAdgBrAA==")) JkPgyp9P7siG9Zh0XCvk [System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String("SgBrAFAAZwBzAGkARwA5AFoAaAAwAFgAQwB5AHAAOQBQADcAdgBrAA==")) JkPgsiG9Zh0XCyp9P7vk Even someone can get the encoded string from the init.conf and use base64 to decode it, but they don't know the salt, so they still can't get the password directly. This PowerShell passed the test in PowerShell version 5.1.16299.1146. Can not run on Powershell version 4 and below. PS H:\>host Check the PowerShell version. #> #------------------------------------------------------------------------------------------------------------------------------------------------------- #variables param ($CREDENTIAL,$SALT) cls if ( [string]::IsNullOrEmpty($CREDENTIAL) -and [string]::IsNullOrEmpty($SALT) ){ $YorN = Read-Host "Do you want to input the Credential? [ y/n ] (Default is y)" if ( $YorN -match "[yY]" -or ([string]::IsNullOrEmpty($YorN))){ $USERNAME = Get-Content .\init.conf | findstr USERNAME | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $CREDENTIAL = Get-Credential -credential $USERNAME $PASSWORD = $CREDENTIAL.Password }else{ $ENCODEDPASSWORD = Get-Content .\init.conf | findstr PASSWORD | %{ $_.Split(':')[1]; } | foreach{ $_.ToString().Trim() } $USERNAME = Get-Content .\init.conf | findstr USERNAME | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } if ( [string]::IsNullOrEmpty($SALT) ){ $YorN = Read-Host "The salt is empty. Do you want to input the salt to decrypt the password? [ y/n ] (Default is y)" if ( $YorN -match "[yY]" -or ([string]::IsNullOrEmpty($YorN))){ $SALT = Read-Host -assecurestring "Please input the salt" $PASSWORD = ([System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String($ENCODEDPASSWORD))).Replace($([System.Runtime.InteropServices.Marshal]::PtrToStringAuto([System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($SALT))),"") }else{ $PASSWORD = [System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String($ENCODEDPASSWORD)) } }else { $PASSWORD = ([System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String($ENCODEDPASSWORD))).Replace($SALT,"") } } }else{ $ENCODEDPASSWORD = Get-Content .\init.conf | findstr PASSWORD | %{ $_.Split(':')[1]; } | foreach{ $_.ToString().Trim() } $USERNAME = Get-Content .\init.conf | findstr USERNAME | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } if ( [string]::IsNullOrEmpty($SALT) ){ $YorN = Read-Host "The salt is empty. Do you want to input the salt to decrypt the password? [ y/n ] (Default is y)" if ( $YorN -match "[yY]" -or ([string]::IsNullOrEmpty($YorN))){ $SALT = Read-Host -assecurestring "Please input the salt" $PASSWORD = ([System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String($ENCODEDPASSWORD))).Replace($([System.Runtime.InteropServices.Marshal]::PtrToStringAuto([System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($SALT))),"") }else{ $PASSWORD = [System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String($ENCODEDPASSWORD)) } }else { $PASSWORD = ([System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String($ENCODEDPASSWORD))).Replace($SALT,"") } } $DOMAIN = Get-Content .\init.conf | findstr DOMAIN | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $EMAILADDRESS = Get-Content .\init.conf | findstr EMAILADDRESS | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $EWSDLLPATH = Get-Content .\init.conf | findstr EWSDLLPATH | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $PDF2HTMLDLLPATH = Get-Content .\init.conf | findstr PDF2HTMLDLLPATH | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $DOWNLOADDIRECTORY = Get-Content .\init.conf | findstr DOWNLOADDIRECTORY | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $REPORTSDIRECTORY = Get-Content .\init.conf | findstr REPORTSDIRECTORY | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $EXTENSIONARRAY = Get-Content .\init.conf | findstr EXTENSIONARRAY | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $EXEMPTURL = (Get-Content .\init.conf | findstr EXEMPTURL | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() }).split(",") $SUBFOLDER = Get-Content .\init.conf | findstr SUBFOLDER | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $INTERVAL = [int]$(Get-Content .\init.conf | findstr INTERVAL | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() }) $VIRUSTOTAL_API_KEY = Get-Content .\init.conf | findstr VIRUSTOTAL_API_KEY | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $URLSCAN_API_KEY = Get-Content .\init.conf | findstr URLSCAN_API_KEY | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $GOOGLE_API_KEY = Get-Content .\init.conf | findstr GOOGLE_API_KEY | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $OPSWAT_API_KEY = Get-Content .\init.conf | findstr OPSWAT_API_KEY | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $CHECKPHISH_API_KEY = Get-Content .\init.conf | findstr CHECKPHISH_API_KEY | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } function Google-Safe-Browsing { Write-OutPut "Google Safe Browsing Scan Report: " >> $LOGFILE $BODY = @() $BODY +=[pscustomobject]@{"client" = @{"clientId" = "eHealth Saskatche"; "clientVersion" = "1.0"}; "threatInfo" = @{"threatTypes" = "MALWARE","SOCIAL_ENGINEERING"; "platformTypes" = "WINDOWS"; "threatEntryTypes" = "URL"; "threatEntries" = @{"url" = "$URL"}}} $HEADERS = @{ 'Content-Type' = "application/json" } $JSONBODY = $BODY | ConvertTo-Json $Uri = 'https://safebrowsing.googleapis.com/v4/threatMatches:find?key='+ $GOOGLE_API_KEY $Results = Invoke-RestMethod -Method 'POST' -Uri $Uri -Body $JSONBODY -Headers $HEADERS if ( ([string]::IsNullOrEmpty($Results)) ) { Write-OutPut "Can not find the result in Google Safe Browsing Scan." >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE }else{ $ThreatType = $Results | select -expand matches | select threatType if ( ($ThreatType.threatType -eq "SOCIAL_ENGINEERING") -or ($ThreatType.threatType -eq "MALWARE") -or ($ThreatType.threatType -eq "POTENTIALLY_HARMFUL_APPLICATION") ) { $global:enable_SecureX = $true } else { $global:enable_SecureX = $false } Write-OutPut "Google Safe Browsing Scan Results: ",$($ThreatType) >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE } } function Submit-URLSCAN { Write-OutPut "URLscan Scan Report: " >> $LOGFILE $BODY = @{ 'url' = "$URL"; 'public' = 'on' } $HEADERS = @{ 'API-Key' = "$URLSCAN_API_KEY" } Try { $SCANRESPONSE = Invoke-RestMethod -Method 'POST' -Uri 'https://urlscan.io/api/v1/scan/' -Headers $HEADERS -Body $BODY } Catch { $reader = New-Object System.IO.StreamReader($_.Exception.Response.GetResponseStream()) } if ( [string]::IsNullOrEmpty($SCANRESPONSE) ) { $reader.BaseStream.Position = 0 $reader.DiscardBufferedData() $Exception = $reader.ReadToEnd() | ConvertFrom-Json } if ( -not ([string]::IsNullOrEmpty($Exception)) ) { Write-Output "Exception Error:" $Exception.description >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE }else{ $RESPONSEAPI = $SCANRESPONSE.api Do { Start-Sleep -s 30 $RESPONSE = try { $SCANRESULT = Invoke-RestMethod -Method 'GET' -Uri $RESPONSEAPI } catch { $_.Exception.Response.StatusCode.Value__} }Until($RESPONSE -ne 404) $ReportURL = $SCANRESULT.task.reportURL $ScreenShot = $SCANRESULT.task.screenshotURL Write-OutPut "ScanReportURL: ",$($ReportURL) >> $LOGFILE Write-OutPut "ScreenShotURL: ",$($ScreenShot) >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE Start-Sleep -s 3 } } function Submit-URL-Virustotal { $BODY = @{ "url" = "$URL" } $HEADERS = @{ "x-apikey" = "$VIRUSTOTAL_API_KEY" } $SCAN = Invoke-RestMethod -Method 'POST' -Uri "https://www.virustotal.com/api/v3/urls" -Headers $HEADERS -Body $BODY $RESULTID = $SCAN.data.id | %{ $_.Split('-')[1]; } | foreach{ $_.ToString().Trim() } $PERMALINK = "https://virustotal.com/gui/url/"+$RESULTID+"/detection" Start-Sleep -s 30 $SCANRESULTS = Invoke-RestMethod -Method 'GET' -Uri "https://www.virustotal.com/api/v3/urls/$RESULTID" -Headers $HEADERS Write-OutPut "VirusTotal URL Scan Report: " >> $LOGFILE Write-OutPut $PERMALINK >> $LOGFILE Write-OutPut "VirusTotal URL Scan Stats: " >> $LOGFILE Write-OutPut $SCANRESULTS.data.attributes.last_analysis_stats >> $LOGFILE if ( ($SCANRESULTS.data.attributes.last_analysis_stats.malicious -gt 0) -or ($SCANRESULTS.data.attributes.last_analysis_stats.suspicious -gt 0) ) { $global:enable_SecureX = $true } else { $global:enable_SecureX = $false } Write-OutPut "VirusTotal URL COMMUNITY VOTES : " >> $LOGFILE Write-OutPut $SCANRESULTS.data.attributes.total_votes >> $LOGFILE if ( $SCANRESULTS.data.attributes.total_votes.malicious -gt 0 ) { $global:enable_SecureX = $true } else { $global:enable_SecureX = $false } Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE } function Submit-FILE-Virustotal { $BODY = @{ "apikey" = "$VIRUSTOTAL_API_KEY"; "file" = "$FILEPATH" } $SCAN = Invoke-RestMethod -Method 'POST' -Uri 'https://www.virustotal.com/vtapi/v2/file/scan' -Body $BODY $HASH = $SCAN.sha256 Start-Sleep -s 60 $HEADERS = @{ "x-apikey" = "$VIRUSTOTAL_API_KEY" } $SCAN = Invoke-RestMethod -Method 'GET' -Uri "https://www.virustotal.com/api/v3/files/$HASH" -Headers $HEADERS $PERMALINK = "https://virustotal.com/gui/file/"+$SCAN.data.id+"/detection" Write-OutPut "VirusTotal File Scan Report: " >> $LOGFILE Write-OutPut $PERMALINK >> $LOGFILE Write-OutPut "VirusTotal File Scan Stats: " >> $LOGFILE Write-OutPut $SCAN.data.attributes.last_analysis_stats >> $LOGFILE Write-OutPut "VirusTotal File COMMUNITY VOTES : " >> $LOGFILE Write-OutPut $SCAN.data.attributes.total_votes >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE } function Submit-FILE-OPSWAT { $URI = 'https://api.metadefender.com/v4/hash/'+$HASH $HEADERS = @{} $HEADERS.Add('apikey', $OPSWAT_API_KEY) $RESPONSE = try { $SCANRESULT = Invoke-RestMethod -Method 'GET' -Uri $URI -Headers $HEADERS } catch { $_.Exception.Response.StatusCode.Value__ } if ( $RESPONSE -eq 404){ $FILENAME = Split-Path $FILEPATH -leaf $URI = 'https://api.metadefender.com/v4/file' $HEADERS = @{} $HEADERS.Add('apikey', $OPSWAT_API_KEY) $HEADERS.Add('filename', $FILENAME) $SCANRESULT = Invoke-RestMethod -Method 'Post' -Uri $URI -Headers $HEADERS -Body $FILEPATH -ContentType 'application/octet-stream' $HASH = $SCANRESULT.sha256 $DATA_ID = $SCANRESULT.data_id $URI = 'https://api.metadefender.com/v4/file/'+$DATA_ID $HEADERS = @{} $HEADERS.Add('apikey', $OPSWAT_API_KEY) Do { Start-Sleep -s 5 $RESPONSE = try { $SCANRESULT = Invoke-RestMethod -Method 'GET' -Uri $URI -Headers $HEADERS } catch { $_.Exception.Response.StatusCode.Value__} } Until ($RESPONSE -ne 404) Write-OutPut "OPSWAT MetaDefender Cloud File Scan Report: " >> $LOGFILE $RESULTLINK = 'https://metadefender.opswat.com/results#!/file/'+$HASH+'/hash/overview' Write-OutPut $RESULTLINK >> $LOGFILE Write-OutPut "POSITIVES | TOTAL" >> $LOGFILE Write-OutPut $($SCANRESULT.scan_results.total_detected_avs) " | " $($SCANRESULT.scan_results.total_avs) >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE }else { Write-OutPut "OPSWAT MetaDefender Cloud File Scan Report: " >> $LOGFILE $RESULTLINK = 'https://metadefender.opswat.com/results#!/file/'+$HASH+'/hash/overview' Write-OutPut $RESULTLINK >> $LOGFILE Write-OutPut "POSITIVES | TOTAL" >> $LOGFILE Write-OutPut $($SCANRESULT.scan_results.total_detected_avs) " | " $($SCANRESULT.scan_results.total_avs) >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE } } function FromEmailAttachment { $EMLData = Get-Content $Args[0] $AdoDbStream = New-Object -ComObject ADODB.Stream $AdoDbStream.Open() $AdoDbStream.LoadFromFile($Args[0]) $global:CdoMessage = New-Object -ComObject CDO.Message $CdoMessage.DataSource.OpenObject($AdoDbStream,"_Stream") Write-OutPut "===From: ",$($CdoMessage.From) >> $LOGFILE Write-OutPut "===To: ",$($CdoMessage.To) >> $LOGFILE Write-OutPut "===Subject: ",$($CdoMessage.Subject) >> $LOGFILE Write-OutPut "===DateTimeReceived: ",$($CdoMessage.SentOn) >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE $TextBody = $CdoMessage.Fields.Item("urn:schemas:httpmail:textdescription").Value $HTMLBody = $CdoMessage.Fields.Item("urn:schemas:httpmail:htmldescription").Value $EmailBODY = $TextBody + $HTMLBody + $EMLData $URLLIST = $EmailBODY | select-string -pattern $URLRegEx -AllMatches | %{ $_.Matches } | %{ $_.Value } | Sort-Object | ? {$EXEMPTURL -notcontains $_} | Get-Unique $EXPLIST = $EXEMPTURL | foreach-object { $URLLIST -match $_ } $URLARRAY = @() foreach ($URL in $URLLIST){ if ( $URL -notin $EXPLIST ){$URLARRAY = $URLARRAY += $URL }} if ( -not ([string]::IsNullOrEmpty($URLARRAY)) ){ foreach($URL in $URLARRAY){ Write-OutPut "URL: ",$URL >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE CheckRedirectedURL } } $BOUNDARY = $CdoMessage.Fields.Item("urn:schemas:mailheader:content-type").Value | %{ $_.Split(';')[1]; } | %{ $_.Split('"')[1]; } for ($i=1;$i -le $CdoMessage.Attachments.count;$i++){ $ContentMediaType = $CdoMessage.Attachments.Item($i).ContentMediaType $FILENAME = $CdoMessage.Attachments.Item($i).FileName $AttachmentPATTERN = """$FILENAME""(.*?) --$BOUNDARY" $ATTACHDATA = [regex]::match($EMLData, $AttachmentPATTERN).Groups[1].Value if ( -not [string]::IsNullOrEmpty($FILENAME) ){ $TRIMNUM = $ATTACHDATA.LastIndexOf(" ")+2 $ATTACHMENTDATA = $ATTACHDATA.Remove(0,$TRIMNUM) $ATTFILENAME = ($DOWNLOADDIRECTORY + $FILENAME) $bytes = [Convert]::FromBase64String($ATTACHMENTDATA) [IO.File]::WriteAllBytes($ATTFILENAME, $bytes) Write-OutPut "Downloaded Attachment : " ($ATTFILENAME) >> $LOGFILE Try { $ALGORITHM = (Get-FileHash ($ATTFILENAME)).Algorithm } Catch [System.SystemException] { $ExceptionError = $_.Exception.Message } if ( [string]::IsNullOrEmpty($ExceptionError) ) { $HASH = (Get-FileHash ($ATTFILENAME)).Hash.ToLower() $FILEPATH = (Get-FileHash ($ATTFILENAME)).Path Write-OutPut "Attachment $ALGORITHM Hash : " $HASH >> $LOGFILE $EXTENSION = [System.IO.Path]::GetExtension($ATTFILENAME) if ( $EXTENSION -eq ".pdf" ){ Write-OutPut "=====================Extract URLs from the PDF file=====================" >> $LOGFILE ExtractURLFromPDFHTML }elseif ( ($EXTENSION -eq ".html") -or ($EXTENSION -eq ".htm") ){ Write-OutPut "=====================Extract URLs from the HTML file=====================" >> $LOGFILE ExtractURLFromPDFHTML }else{ Submit-FILE-Virustotal Submit-FILE-OPSWAT } }else { Write-OutPut "********************************************************************" > $LOGFILE Write-Output "Exception Error:" $ExceptionError >> $LOGFILE Write-OutPut "********************************************************************" > $LOGFILE } } } } function ConvertLogToHTML { $File = Get-Content $LOGFILE $FileLine = @() Foreach ($Line in $File) { $MyObject = New-Object -TypeName PSObject if ( ($Line -match "virustotal.com") -or ($Line -match "urlscan.io") -or ($Line -match "opswat.com") -or ($Line -match "checkphish.ai") -or ($Line -match "googleapis.com") ){ if ($Line -match ".png"){ Add-Member -InputObject $MyObject -Type NoteProperty -Name "Security Scan Report" -Value "<a href='$Line'>$Line</a><img src='$Line' height='640' width='800'>" }else{ Add-Member -InputObject $MyObject -Type NoteProperty -Name "Security Scan Report" -Value "<a href='$Line'>$Line</a>" } }else{ Add-Member -InputObject $MyObject -Type NoteProperty -Name "Security Scan Report" -Value $Line } $FileLine += $MyObject } $($FileLine | ConvertTo-Html -Title "Security Scan Report" -Property "Security Scan Report" ) -replace '>','>' -replace '<','<' -replace ''',"'" | Out-File $HTMLREPFILE } function ExtractURLFromPDFHTML { if ( $EXTENSION -eq ".pdf" ){ Add-Type -Path $PDF2HTMLDLLPATH $extractor = new-object Bytescout.PDF2HTML.HTMLExtractor $extractor.CheckPermissions = $False $extractor.LoadDocumentFromFile($ATTFILENAME) $BaseName = gci $ATTFILENAME | %{$_.BaseName} $FilePath = Split-Path -path $ATTFILENAME $HTMLFILE = $FilePath+"\"+$BaseName+".html" $extractor.SaveHtmlToFile($HTMLFILE) $extractor.Reset() }else{ $HTMLFILE = $ATTFILENAME } $URLArrayFromHTML = Get-Content $HTMLFILE | select-string -pattern $URLRegEx -AllMatches | %{ $_.Matches } | %{ $_.Value } | Sort-Object | Get-Unique $URLArrayFromPDF = Get-Content $ATTFILENAME | select-string -pattern $URLRegEx -AllMatches | %{ $_.Matches } | %{ $_.Value } | Sort-Object | Get-Unique $URLLIST = $URLArrayFromHTML + $URLArrayFromPDF | Sort-Object | Get-Unique $EXPLIST = $EXEMPTURL | foreach-object { $URLLIST -match $_ } $URLARRAY = @() foreach ($URL in $URLLIST){ if ( $URL -notin $EXPLIST ){$URLARRAY = $URLARRAY += $URL }} # URL is not null or empty do check the URL if ( -not ([string]::IsNullOrEmpty($URLARRAY)) ){ foreach($URL in $URLARRAY){ Write-OutPut "URL: ",$URL >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE CheckRedirectedURL } }else{ Write-OutPut "=====================No URL in the PDF/HTML file needs to scan=====================" >> $LOGFILE Submit-FILE-Virustotal Submit-FILE-OPSWAT } } function CheckRedirectedURL { Try { $webRequest = [System.Net.WebRequest]::Create($URL) } Catch { $ExceptionError = $_.Exception.Message } if ( [string]::IsNullOrEmpty($ExceptionError) ) { if ( [string]::IsNullOrEmpty($([URI]$URL).Scheme) ) { $URL = "http://"+$URL } $webRequest.AllowAutoRedirect=$false Try { $webResponse = $webRequest.GetResponse() } Catch { $ExceptionError = $_.Exception.Message } if ( [string]::IsNullOrEmpty($ExceptionError) ) { if ( ($webResponse.StatusCode -eq "Found") -or ($webResponse.StatusCode -eq "Redirect") ) { Write-Output "The Original URL is:" $URL >> $LOGFILE $URL = $webResponse.GetResponseHeader("Location") Write-OutPut " |" >> $LOGFILE Write-Output " |--> The Redirected URL is:" $URL >> $LOGFILE Submit-URL-Virustotal Submit-URLSCAN Google-Safe-Browsing if ( $global:enable_SecureX ) { .\MineMeld_Indicator.ps1 $URL URL -comment "User Reported" Write-OutPut "$($URL) has been added into MineMeld." >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE .\secureX.ps1 $URL Write-OutPut "secureX and MDATP investigation is done." >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE if ( ![string]::IsNullOrEmpty($CdoMessage) ) { $regex = [regex]"\<(.*)\>" $Blocklist_Sender = $($regex.match($($CdoMessage.From)).Groups[1].value).ToLower() }else{ $regex = [regex]"From:.*[\[\<](.*)[\]\>]" $regex_eml = '^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$' $regex_mailto = '^mailto:' if ( $($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}) -match $regex_eml ) { $Blocklist_Sender = $($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}).ToLower() }elseif( $($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}) -match $regex_mailto ) { $Blocklist_Sender = $($($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}) -split ":" ,0)[1].ToLower() } } .\ESA_Spam_Block.ps1 $Blocklist_Sender ALL Write-OutPut "SPAM Sender $($Blocklist_Sender) has been blacklisted." >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE } }else{ if ( $webResponse.ResponseUri.OriginalString -eq $webResponse.ResponseUri.AbsoluteUri ) { Write-Output "No Redirection, Will scan the Original URL" >> $LOGFILE Submit-URL-Virustotal Submit-URLSCAN Google-Safe-Browsing if ( $global:enable_SecureX ) { .\MineMeld_Indicator.ps1 $URL URL -comment "User Reported" Write-OutPut "$($URL) has been added into MineMeld." >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE .\secureX.ps1 $URL Write-OutPut "secureX and MDATP investigation is done." >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE if ( ![string]::IsNullOrEmpty($CdoMessage) ) { $regex = [regex]"\<(.*)\>" $Blocklist_Sender = $($regex.match($($CdoMessage.From)).Groups[1].value).ToLower() }else{ $regex = [regex]"From:.*[\[\<](.*)[\]\>]" $regex_eml = '^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$' $regex_mailto = '^mailto:' if ( $($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}) -match $regex_eml ) { $Blocklist_Sender = $($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}).ToLower() }elseif( $($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}) -match $regex_mailto ) { $Blocklist_Sender = $($($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}) -split ":" ,0)[1].ToLower() } } .\ESA_Spam_Block.ps1 $Blocklist_Sender ALL Write-OutPut "SPAM Sender $($Blocklist_Sender) has been blacklisted." >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE } } } }else{ Write-Output "No Auto Redirect for this URL. Will scan the Original URL" >> $LOGFILE Submit-URL-Virustotal Submit-URLSCAN Google-Safe-Browsing if ( $global:enable_SecureX ) { .\MineMeld_Indicator.ps1 $URL URL -comment "User Reported" Write-OutPut "$($URL) has been added into MineMeld." >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE .\secureX.ps1 $URL Write-OutPut "secureX and MDATP investigation is done." >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE if ( ![string]::IsNullOrEmpty($CdoMessage) ) { $regex = [regex]"\<(.*)\>" $Blocklist_Sender = $($regex.match($($CdoMessage.From)).Groups[1].value).ToLower() }else{ $regex = [regex]"From:.*[\[\<](.*)[\]\>]" $regex_eml = '^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$' $regex_mailto = '^mailto:' if ( $($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}) -match $regex_eml ) { $Blocklist_Sender = $($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}).ToLower() }elseif( $($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}) -match $regex_mailto ) { $Blocklist_Sender = $($($EMAIL.Body.Text | Select-String -Pattern $regex -AllMatches | ForEach-Object {$_.matches.groups[-1].value}) -split ":" ,0)[1].ToLower() } } .\ESA_Spam_Block.ps1 $Blocklist_Sender ALL Write-OutPut "SPAM Sender $($Blocklist_Sender) has been blacklisted." >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE } } Get-Job | Wait-Job # $webResponse.Close() }else { Write-Output "Exception Error:" $ExceptionError >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE } } function MAIN { date If(!(test-path $DOWNLOADDIRECTORY)){ New-Item -ItemType directory -Path $DOWNLOADDIRECTORY } If(!(test-path $REPORTSDIRECTORY)){ New-Item -ItemType directory -Path $REPORTSDIRECTORY } Import-Module $EWSDLLPATH $SERVICE = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService([Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010_SP2) $SERVICE.Credentials = New-Object Net.NetworkCredential($USERNAME, $PASSWORD, $DOMAIN) $SERVICE.AutodiscoverUrl($EMAILADDRESS) $INBOX = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($SERVICE,[Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Inbox) $FOLDERROOT = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($SERVICE,[Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::msgFolderRoot) $SUBFOLDERID = ($FOLDERROOT.FindFolders([Microsoft.Exchange.WebServices.Data.FolderView]100) | where { $_.DisplayName -eq $SUBFOLDER }).Id $PROPERTYSET = new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::FirstClassProperties) $PROPERTYSET.RequestedBodyType = [Microsoft.Exchange.WebServices.Data.BodyType]::Text [System.Net.ServicePointManager]::SecurityProtocol = @("Tls12","Tls11","Tls","Ssl3") # [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls -bor [Net.SecurityProtocolType]::Tls11 -bor [Net.SecurityProtocolType]::Tls12 # Use .Net Object to ignore self-signed certificate if ("TrustAllCertsPolicy" -as [type]) {} else { Add-Type @" using System.Net; using System.Security.Cryptography.X509Certificates; public class TrustAllCertsPolicy : ICertificatePolicy { public bool CheckValidationResult( ServicePoint srvPoint, X509Certificate certificate, WebRequest request, int certificateProblem) { return true; } } "@ [System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy } if ( $INBOX.TotalCount -ne 0 ){ $ITEMS = $INBOX.FindItems($INBOX.TotalCount) foreach ( $EMAIL in $ITEMS.Items ){ # only get unread emails if( $EMAIL.isread -eq $false ){ if( ($EMAIL.Subject -ne "Thank you for contacting the eHealth Saskatchewan Service Desk") -or ($EMAIL.Subject -ne "Service Desk Auto Reply for emailsecurity@ehealthsask.ca") ){ # load the property set to get to the body $EMAIL.load($PROPERTYSET) $RANDOMID = -join ((48..57) + (97..122) | Get-Random -Count 20 | % {[char]$_}) $LOGFILE = $REPORTSDIRECTORY+"security-scan-report_"+$RANDOMID+".log" $HTMLREPFILE = $REPORTSDIRECTORY+"security-scan-report_"+$RANDOMID+".html" # output the results - first of all the From, Subject and Date Time Received Write-OutPut "====================================================================" > $LOGFILE Write-OutPut "From: ",$($EMAIL.From) >> $LOGFILE Write-OutPut "To: ",$($EMAIL.ToRecipients) >> $LOGFILE Write-OutPut "Subject: ",$($EMAIL.Subject) >> $LOGFILE Write-OutPut "DateTimeReceived: ",$($EMAIL.DateTimeReceived) >> $LOGFILE Write-OutPut "====================================================================" >> $LOGFILE $URLRegEx = '\b(?:(?:https?|ftp|file)://|www\.|ftp\.)(?:\([-A-Z0-9+&@#/%=~_|$?!:,.]*\)|[-A-Z0-9+&@#/%=~_|$?!:,.])*(?:\([-A-Z0-9+&@#/%=~_|$?!:,.]*\)|[A-Z0-9+&@#/%=~_|$])' $URLLIST = $($EMAIL.Body.Text) | select-string -pattern $URLRegEx -AllMatches | %{ $_.Matches } | %{ $_.Value } | Sort-Object | Get-Unique $EXPLIST = $EXEMPTURL | foreach-object { $URLLIST -match $_ } $URLARRAY = @() foreach ($URL in $URLLIST){ if ( $URL -notin $EXPLIST ){$URLARRAY = $URLARRAY += $URL }} # URL is not null or empty do check the URL if ( -not ([string]::IsNullOrEmpty($URLARRAY)) ){ foreach($URL in $URLARRAY){ Write-OutPut "URL: ",$URL >> $LOGFILE Write-OutPut "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" >> $LOGFILE CheckRedirectedURL } } foreach($ATTACH in $EMAIL.Attachments){ if ( ![string]::IsNullOrEmpty($ATTACH.Name)){ $EXTENSION = [System.IO.Path]::GetExtension($ATTACH.Name.ToString().ToLower()) }else{ $EXTENSION ="" } # only save the file that extension is not in the extension list if ( !$EXTENSIONARRAY.contains($EXTENSION) -or [string]::IsNullOrEmpty($EXTENSION) ){ if ( ($ATTACH.ContentType -eq "message/rfc822") -or ([string]::IsNullOrEmpty($ATTACH.ContentType)) -and ($ATTACH.PSobject.Properties.name -match "Item") ){ Write-OutPut "=====================The attachment is an email=====================" >> $LOGFILE $MIMEPROPERTYSET = new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.ItemSchema]::MimeContent) $ATTACH.Load($MIMEPROPERTYSET) $AttachmentData = $ATTACH.Item.MimeContent.Content $ATTFILENAME = ($DOWNLOADDIRECTORY + [GUID]::NewGuid().ToString() + "_MSG.eml") $EXTENSION = ".eml" }else{ $ATTACH.Load() $AttachmentData = $ATTACH.Content $ATTFILENAME = ($DOWNLOADDIRECTORY + $ATTACH.Name.ToString().Trim("")) } Try { $ATTFILE = new-object System.IO.FileStream(($ATTFILENAME), [System.IO.FileMode]::Create) } Catch [System.SystemException] { $ExceptionError = $_.Exception.Message } if ( [string]::IsNullOrEmpty($ExceptionError) ) { $ATTFILE.Write($AttachmentData, 0, $AttachmentData.Length) $ATTFILE.Close() Write-OutPut "Downloaded Attachment : " ($ATTFILENAME) >> $LOGFILE Try { $ALGORITHM = (Get-FileHash ($ATTFILENAME)).Algorithm } Catch [System.SystemException] { $ExceptionError = $_.Exception.Message } if ( [string]::IsNullOrEmpty($ExceptionError) ) { $HASH = (Get-FileHash ($ATTFILENAME)).Hash.ToLower() $FILEPATH = (Get-FileHash ($ATTFILENAME)).Path Write-OutPut "Attachment $ALGORITHM Hash : " $HASH >> $LOGFILE if ( ($EXTENSION -eq ".eml") -or ($EXTENSION -eq ".raw") ){ FromEmailAttachment $ATTFILENAME } else{ if ( ($EXTENSION -eq ".pdf") -or ($EXTENSION -eq ".htm") -or ($EXTENSION -eq ".html") ){ Write-OutPut "=====================Extract URLs from the PDF/HTML file=====================" >> $LOGFILE ExtractURLFromPDFHTML Submit-FILE-Virustotal Submit-FILE-OPSWAT }else { if ( -not ([string]::IsNullOrEmpty($FILEPATH)) ){ Submit-FILE-Virustotal Submit-FILE-OPSWAT } } } } else { Write-OutPut "********************************************************************" > $LOGFILE Write-Output "Exception Error:" $ExceptionError >> $LOGFILE Write-OutPut "********************************************************************" > $LOGFILE } } else { Write-OutPut "********************************************************************" > $LOGFILE Write-Output "Exception Error:" $ExceptionError >> $LOGFILE Write-OutPut "********************************************************************" > $LOGFILE } } } Write-OutPut "================================END=================================" >> $LOGFILE ConvertLogToHTML $REPLYSUBJECT = "AUTO-REPLY/Security Scan Report-- "+$($EMAIL.Subject) $SMTPSERVER = Get-Content .\init.conf | findstr SMTPSERVER | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $REPLYTO = Get-Content .\init.conf | findstr REPLYTO | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $REPLYCC = Get-Content .\init.conf | findstr REPLYCC | %{ $_.Split('=')[1]; } | foreach{ $_.ToString().Trim() } $EMAIBODY = '%CUSTOMER_EMAIL=' + $($EMAIL.From.Address) + "`r`n" + '%CUSTOMER=' + $($EMAIL.From.Name) + "`r`n" + '%SUMMARY=Security Scan Report--' + $($EMAIL.Subject) Send-MailMessage -SmtpServer $SMTPSERVER -To $REPLYTO -From $EMAILADDRESS -Cc $REPLYCC -Subject $REPLYSUBJECT -Body $EMAIBODY -Attachments $HTMLREPFILE } } $EMAIL.isRead = $true $EMAIL.Update([Microsoft.Exchange.WebServices.Data.ConflictResolutionMode]::AutoResolve) $EMAIL.Move($SUBFOLDERID) } }else{ Write-OutPut "==============There is no email in the inbox==================" } } # Main Procedure if ( $INTERVAL -eq 0 ){ MAIN }else{ while($true){ MAIN Write-Host -NoNewline "==============After"$INTERVAL" seconds will check again==============" "" Start-Sleep -s $INTERVAL } } |