Write Messages to Users - Metasploit


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

Table Of Contents
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Module Overview

Name: Write Messages to Users
Module: post/multi/general/wall
Source code: modules/post/multi/general/wall.rb
Disclosure date: -
Last modification time: 2017-07-24 06:26:21 +0000
Supported architecture(s): -
Supported platform(s): Linux, OSX, Unix
Target service / protocol: -
Target network port(s): -
List of CVEs: -

This module utilizes the wall(1) or write(1) utilities, as appropriate, to send messages to users on the target system.

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/multi/general/wall

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

msf6 > use post/multi/general/wall

msf6 post(multi/general/wall) > show info

       Name: Write Messages to Users
     Module: post/multi/general/wall
   Platform: Linux, OSX, Unix
       Arch: 
       Rank: Normal

Provided by:
  Jon Hart <[email protected]>

Compatible session types:
  Meterpreter
  Shell

Basic options:
  Name     Current Setting  Required  Description
  ----     ---------------  --------  -----------
  COWSAY   false            yes       Display MESSAGE in a ~cowsay way
  MESSAGE                   no        The message to send
  SESSION                   yes       The session to run this module on.
  USERS                     no        List of users to write(1) to, separated by commas.  wall(1)s to all users by default

Description:
  This module utilizes the wall(1) or write(1) utilities, as 
  appropriate, to send messages to users on the target system.

Module Options

This is a complete list of options available in the multi/general/wall post exploitation module:

msf6 post(multi/general/wall) > show options

Module options (post/multi/general/wall):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   COWSAY   false            yes       Display MESSAGE in a ~cowsay way
   MESSAGE                   no        The message to send
   SESSION                   yes       The session to run this module on.
   USERS                     no        List of users to write(1) to, separated by commas.  wall(1)s to all users by default

Advanced Options

Here is a complete list of advanced options supported by the multi/general/wall post exploitation module:

msf6 post(multi/general/wall) > show advanced

Module advanced options (post/multi/general/wall):

   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 multi/general/wall module can do:

msf6 post(multi/general/wall) > show actions

Post actions:

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

Evasion Options

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

msf6 post(multi/general/wall) > show evasion

Module evasion options:

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

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See Also

Check also the following modules related to this module:

Authors

  • Jon Hart <jon_hart[at]rapid7.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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