Wednesday, October 10, 2012

Show the cities and Email has tranisted through using the Mail Header, EWS,Powershell and Geolocation (MEC Sample)

This is Sample 2 from the where's wally section of my MEC talk, In this sample we will look at how you can get the Internet Headers of a Message via EWS. Then using RegEx parse the IPAddress's from the MailHeader and then using the Geolocation code I talk about in sample 1

The Internet Headers on a Message eg


tell you what happened to a message on the way to your inbox for example what SMTP mail-servers its transited through. In EWS this information can be accessed via the PR_TRANSPORT_MESSAGE_HEADERS extended property http://msdn.microsoft.com/en-us/library/office/cc815628.aspx


 By using Regex in Powershell (and some other parsing code to clean the code up) you can parse all the IPAddress's you see in the Received headers then using GeoLocation look these up to determine the city that IPAddress is located in, then compile a list of cities that the email transited through. An example report of running this script on the Junk Email Folder of a Mailbox gives us something like


For more information on the Geolocation code I've used see the 1st example

I've put a download of this script here the code itself looks like

  1. ## Get the Mailbox to Access from the 1st commandline argument  
  2.   
  3. $MailboxName = $args[0]  
  4. $rptCollection = @()  
  5.   
  6. ## Load Managed API dll    
  7. Add-Type -Path "C:\Program Files\Microsoft\Exchange\Web Services\1.2\Microsoft.Exchange.WebServices.dll"    
  8.     
  9. ## Set Exchange Version    
  10. $ExchangeVersion = [Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010_SP2    
  11.     
  12. ## Create Exchange Service Object    
  13. $service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService($ExchangeVersion)    
  14.     
  15. ## Set Credentials to use two options are availible Option1 to use explict credentials or Option 2 use the Default (logged On) credentials    
  16.     
  17. #Credentials Option 1 using UPN for the windows Account    
  18. $psCred = Get-Credential    
  19. $creds = New-Object System.Net.NetworkCredential($psCred.UserName.ToString(),$psCred.GetNetworkCredential().password.ToString())    
  20. $service.Credentials = $creds        
  21.     
  22. #Credentials Option 2    
  23. #service.UseDefaultCredentials = $true    
  24.     
  25. ## Choose to ignore any SSL Warning issues caused by Self Signed Certificates    
  26.     
  27. ## Code From http://poshcode.org/624  
  28. ## Create a compilation environment  
  29. $Provider=New-Object Microsoft.CSharp.CSharpCodeProvider  
  30. $Compiler=$Provider.CreateCompiler()  
  31. $Params=New-Object System.CodeDom.Compiler.CompilerParameters  
  32. $Params.GenerateExecutable=$False  
  33. $Params.GenerateInMemory=$True  
  34. $Params.IncludeDebugInformation=$False  
  35. $Params.ReferencedAssemblies.Add("System.DLL") | Out-Null  
  36.   
  37. $TASource=@' 
  38.   namespace Local.ToolkitExtensions.Net.CertificatePolicy{ 
  39.     public class TrustAll : System.Net.ICertificatePolicy { 
  40.       public TrustAll() {  
  41.       } 
  42.       public bool CheckValidationResult(System.Net.ServicePoint sp, 
  43.         System.Security.Cryptography.X509Certificates.X509Certificate cert,  
  44.         System.Net.WebRequest req, int problem) { 
  45.         return true; 
  46.       } 
  47.     } 
  48.   } 
  49. '@   
  50. $TAResults=$Provider.CompileAssemblyFromSource($Params,$TASource)  
  51. $TAAssembly=$TAResults.CompiledAssembly  
  52.   
  53. ## We now create an instance of the TrustAll and attach it to the ServicePointManager  
  54. $TrustAll=$TAAssembly.CreateInstance("Local.ToolkitExtensions.Net.CertificatePolicy.TrustAll")  
  55. [System.Net.ServicePointManager]::CertificatePolicy=$TrustAll  
  56.   
  57. ## end code from http://poshcode.org/624  
  58.     
  59. ## Set the URL of the CAS (Client Access Server) to use two options are availbe to use Autodiscover to find the CAS URL or Hardcode the CAS to use    
  60.     
  61. #CAS URL Option 1 Autodiscover    
  62. $service.AutodiscoverUrl($MailboxName,{$true})    
  63. "Using CAS Server : " + $Service.url     
  64.      
  65. #CAS URL Option 2 Hardcoded    
  66.     
  67. #$uri=[system.URI] "https://casservername/ews/exchange.asmx"    
  68. #$service.Url = $uri      
  69.     
  70. ## Optional section for Exchange Impersonation    
  71.     
  72. #$service.ImpersonatedUserId = new-object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress, $MailboxName)   
  73.   
  74. # Bind to the Inbox Folder  
  75. $folderid= new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::JunkEmail,$MailboxName)     
  76. $Inbox = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,$folderid)  
  77.   
  78. #Define Property for the Message Header  
  79. $PR_TRANSPORT_MESSAGE_HEADERS = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x007D,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::String);  
  80.   
  81. $psPropset= new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::FirstClassProperties)    
  82. $psPropset.add($PR_TRANSPORT_MESSAGE_HEADERS)  
  83.   
  84. #Setup GEOIP  
  85. $geoip = New-Object -ComObject "GeoIPCOMEx.GeoIPEx"  
  86. $geoip.set_db_path('c:\mec\') 
  87.  
  88. #Define ItemView to retrive just 10 Items     
  89. $ivItemView =  New-Object Microsoft.Exchange.WebServices.Data.ItemView(50)         
  90.     $fiItems = $service.FindItems($Inbox.Id,$ivItemView)     
  91.     [Void]$service.LoadPropertiesForItems($fiItems,$psPropset)   
  92.     foreach($Item in $fiItems.Items){       
  93.         $MailHeaderVal = $null 
  94.         if($Item.TryGetProperty($PR_TRANSPORT_MESSAGE_HEADERS,[ref]$MailHeaderVal)){     
  95.             $rptObj = "" | Select DateTimeReceived,From,Subject,Size,TransitCities 
  96.             $rptObj.DateTimeReceived = $Item.DateTimeReceived  
  97.             $rptObj.From = $Item.Sender.Address 
  98.             if($Item.Subject.Length -gt 50){ 
  99.                 $rptObj.Subject = $Item.Subject.SubString(0,50) 
  100.             } 
  101.             else{ 
  102.                 $rptObj.Subject = $Item.Subject 
  103.             } 
  104.             $rptObj.Size = $Item.Size 
  105.             $SMTPTrace = $MailHeaderVal.Substring(0,$MailHeaderVal.IndexOf("From:")) 
  106.             # RegEx for IP address 
  107.             $RegExIP = '\b(([01]?\d?\d|2[0-4]\d|25[0-5])\.){3}([01]?\d?\d|2[0-4]\d|25[0-5])\b'  
  108.             $matchedItems = [regex]::matches($SMTPTrace$RegExIP)  
  109.             $lochash = @{}  
  110.             foreach($Match in $matchedItems){  
  111.                 $preVal = $MailHeaderVal.SubString(($Match.Index-1),1)  
  112.                 if($preVal -eq "[" -bor $preVal -eq "("){  
  113.                     if($geoip.find_by_addr($Match.Value)){  
  114.                         if($geoip.country_name -ne "Localhost" -band $geoip.country_name -ne "Local Area Network"){  
  115.                             if($lochash.ContainsKey(($geoip.city + "-" +  $geoip.country_name)) -eq $false){  
  116.                                 $lochash.add(($geoip.city + "-" +  $geoip.country_name),1)  
  117.                                 $rptObj.TransitCities = $rptObj.TransitCities + $geoip.city + "-" +  $geoip.country_name + ";"  
  118.                             }  
  119.                         }  
  120.                     }  
  121.                 }  
  122.             }  
  123.             $rptCollection += $rptObj  
  124.         }            
  125.     }  
  126. $tableStyle = @" 
  127. <style> 
  128. BODY{background-color:white;} 
  129. TABLE{border-width: 1px; 
  130.   border-style: solid; 
  131.   border-color: black; 
  132.   border-collapse: collapse; 
  133. } 
  134. TH{border-width: 1px; 
  135.   padding: 10px; 
  136.   border-style: solid; 
  137.   border-color: black; 
  138.   background-color:#66CCCC 
  139. } 
  140. TD{border-width: 1px; 
  141.   padding: 2px; 
  142.   border-style: solid; 
  143.   border-color: black; 
  144.   background-color:white 
  145. } 
  146. </style> 
  147. "@  
  148.     
  149. $body = @" 
  150. <p style="font-size:25px;family:calibri;color:#ff9100">  
  151. $TableHeader  
  152. </p>  
  153. "@  
  154.   
  155. $rptCollection | ConvertTo-HTML -head $tableStyle –body $body | Out-File c:\temp\jnkmhReport.htm  



No comments: