SMB Version Detection - Metasploit


This page contains detailed information about how to use the auxiliary/scanner/smb/smb_version metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Table Of Contents
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Module Overview

Name: SMB Version Detection
Module: auxiliary/scanner/smb/smb_version
Source code: modules/auxiliary/scanner/smb/smb_version.rb
Disclosure date: -
Last modification time: 2021-04-09 13:59:39 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: microsoft-ds, netbios-ssn
Target network port(s): 139, 445
List of CVEs: -

Fingerprint and display version information about SMB servers. Protocol information and host operating system (if available) will be reported. Host operating system detection requires the remote server to support version 1 of the SMB protocol. Compression and encryption capability negotiation is only present in version 3.1.1.

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

This module is a scanner module, and is capable of testing against multiple hosts.

msf > use auxiliary/scanner/smb/smb_version
msf auxiliary(smb_version) > show options
    ... show and set options ...
msf auxiliary(smb_version) > set RHOSTS ip-range
msf auxiliary(smb_version) > exploit

Other examples of setting the RHOSTS option:

Example 1:

msf auxiliary(smb_version) > set RHOSTS 192.168.1.3-192.168.1.200

Example 2:

msf auxiliary(smb_version) > set RHOSTS 192.168.1.1/24

Example 3:

msf auxiliary(smb_version) > set RHOSTS file:/tmp/ip_list.txt

Required Options

  • RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'

Knowledge Base

The smb_version module is used to determine information about a remote SMB server. It will fingerprint protocol version and capability information. If the target server supports SMB version 1, then the module will also attempt to identify the information about the host operating system.

Protocol Information

  1. Protocol Versions: The list of SMB protocol versions that the server supports.
  2. Preferred Dialect: The preferred dialect for the newest protocol version that the server supports.
  3. Signature Requirements: Whether or not the server requires security signatures.
  4. Uptime: How long the server has been up, as calculated by subtracting the current time from the system time. This calculation requires that both fields be provided by the server. If one or both fields are unset, this value will be omitted.
    • Requires versions: 2+
  5. Server GUID: The unique identifier of the server. This value can be used to identify systems with multiple network interfaces.
    • Requires versions: 2+
  6. Capabilities: The supported encryption and compression algorithms that the server supports.
    • Requires versions: 3+
  7. Authentication Domain: The domain that the server prompts the user to authenticate to when attempting to login.

Host Operating System Information

This information is only available if the target SMB server supports SMB version 1.

  1. OS (product and version)
  2. LAN Manager version
  3. OS build number
  4. Service pack
  5. OS language

Verification Steps

  1. Do: use auxiliary/scanner/smb/smb_version
  2. Do: set rhosts [IP]
  3. Do: run

Scenarios

This is an example run of a network with several different version of Windows, metasploit 1 and 2, and a NAS device running SAMBA.

msf5 auxiliary(scanner/smb/smb_version) > set RHOSTS 192.168.159.0/24
RHOSTS => 192.168.159.0/24
msf5 auxiliary(scanner/smb/smb_version) > show options 

Module options (auxiliary/scanner/smb/smb_version):

   Name     Current Setting   Required  Description
   ----     ---------------   --------  -----------
   RHOSTS   192.168.159.0/24  yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:'
   THREADS  15                yes       The number of concurrent threads (max one per host)

msf5 auxiliary(scanner/smb/smb_version) > run

[*] 192.168.159.10:445    - SMB Detected (versions:1, 2, 3) (preferred dialect:SMB 3.1.1) (compression capabilities:LZNT1) (encryption capabilities:AES-128-CCM) (signatures:required) (guid:{faf5534c-d125-4081-aa2a-cf3256415908}) (authentication domain:MSFLAB)
[*] 192.168.159.10:445    -   Host could not be identified: Windows Server 2019 Standard 17763 (Windows Server 2019 Standard 6.3)
[*] 192.168.159.30:445    - SMB Detected (versions:2, 3) (preferred dialect:SMB 3.1.1) (compression capabilities:LZNT1) (encryption capabilities:AES-128-CCM) (signatures:optional) (guid:{8f1ce8b7-e198-404e-89d6-a27297b1c3f2}) (authentication domain:DESKTOP-RTCRBEV)
[*] 192.168.159.0/24:     - Scanned  30 of 256 hosts (11% complete)
[*] 192.168.159.38:445    - SMB Detected (versions:2, 3) (preferred dialect:SMB 3.0.2) (signatures:optional) (uptime:4d 17h 33m 34s) (guid:{cd5d41db-0bb8-4954-9421-0cdd14b7c6f7}) (authentication domain:WIN-46IL3RC2FHI)
[*] 192.168.159.31:445    - SMB Detected (versions:1, 2) (preferred dialect:SMB 2.1) (signatures:optional) (uptime:3m 6s) (guid:{caaee1a3-8f74-4dd0-b0eb-436d7abc8979}) (authentication domain:WIN-9NSI4A6AIHJ)
[+] 192.168.159.31:445    -   Host is running Windows 7 Professional SP1 (build:7601) (name:WIN-9NSI4A6AIHJ) (workgroup:WORKGROUP)
[*] 192.168.159.48:445    - SMB Detected (versions:1) (preferred dialect:) (signatures:optional)
[+] 192.168.159.48:445    -   Host is running Windows XP SP2 (language:English) (name:SMCINTYR-81CC7C) (workgroup:WORKGROUP)
[*] 192.168.159.0/24:     - Scanned  57 of 256 hosts (22% complete)
[*] 192.168.159.0/24:     - Scanned  87 of 256 hosts (33% complete)
[*] 192.168.159.0/24:     - Scanned 104 of 256 hosts (40% complete)
[*] 192.168.159.128:445   - SMB Detected (versions:2, 3) (preferred dialect:SMB 3.1.1) (compression capabilities:LZ77) (encryption capabilities:AES-128-GCM) (signatures:optional) (guid:{61636f6c-686c-736f-7400-000000000000}) (authentication domain:LOCALHOST)
[*] 192.168.159.129:445   - SMB Detected (versions:1, 2, 3) (preferred dialect:SMB 3.1.1) (compression capabilities:LZNT1) (encryption capabilities:AES-128-CCM) (signatures:optional) (guid:{19147a6c-08c1-4e9c-b6c5-1119e2c57e6a}) (authentication domain:DESKTOP-R9TM84E)
[+] 192.168.159.129:445   -   Host is running Windows 10 Enterprise (build:17763) (name:DESKTOP-R9TM84E) (workgroup:WORKGROUP)
[*] 192.168.159.0/24:     - Scanned 137 of 256 hosts (53% complete)
[*] 192.168.159.0/24:     - Scanned 163 of 256 hosts (63% complete)
[*] 192.168.159.0/24:     - Scanned 180 of 256 hosts (70% complete)
[*] 192.168.159.0/24:     - Scanned 205 of 256 hosts (80% complete)
[*] 192.168.159.0/24:     - Scanned 234 of 256 hosts (91% complete)
[*] 192.168.159.0/24:     - Scanned 256 of 256 hosts (100% complete)
[*] Auxiliary module execution completed
msf5 auxiliary(scanner/smb/smb_version) >

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Msfconsole Usage

Here is how the scanner/smb/smb_version auxiliary module looks in the msfconsole:

msf6 > use auxiliary/scanner/smb/smb_version

msf6 auxiliary(scanner/smb/smb_version) > show info

       Name: SMB Version Detection
     Module: auxiliary/scanner/smb/smb_version
    License: Metasploit Framework License (BSD)
       Rank: Normal

Provided by:
  hdm <[email protected]>
  Spencer McIntyre
  Christophe De La Fuente

Check supported:
  No

Basic options:
  Name     Current Setting  Required  Description
  ----     ---------------  --------  -----------
  RHOSTS                    yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  THREADS  1                yes       The number of concurrent threads (max one per host)

Description:
  Fingerprint and display version information about SMB servers. 
  Protocol information and host operating system (if available) will 
  be reported. Host operating system detection requires the remote 
  server to support version 1 of the SMB protocol. Compression and 
  encryption capability negotiation is only present in version 3.1.1.

Module Options

This is a complete list of options available in the scanner/smb/smb_version auxiliary module:

msf6 auxiliary(scanner/smb/smb_version) > show options

Module options (auxiliary/scanner/smb/smb_version):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   RHOSTS                    yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   THREADS  1                yes       The number of concurrent threads (max one per host)

Advanced Options

Here is a complete list of advanced options supported by the scanner/smb/smb_version auxiliary module:

msf6 auxiliary(scanner/smb/smb_version) > show advanced

Module advanced options (auxiliary/scanner/smb/smb_version):

   Name                    Current Setting    Required  Description
   ----                    ---------------    --------  -----------
   CHOST                                      no        The local client address
   CPORT                                      no        The local client port
   ConnectTimeout          10                 yes       Maximum number of seconds to establish a TCP connection
   DCERPC::ReadTimeout     10                 yes       The number of seconds to wait for DCERPC responses
   NTLM::SendLM            true               yes       Always send the LANMAN response (except when NTLMv2_session is specified)
   NTLM::SendNTLM          true               yes       Activate the 'Negotiate NTLM key' flag, indicating the use of NTLM responses
   NTLM::SendSPN           true               yes       Send an avp of type SPN in the ntlmv2 client blob, this allows authentication on Windows 7+/Server 2008 R2+ when SPN is required
   NTLM::UseLMKey          false              yes       Activate the 'Negotiate Lan Manager Key' flag, using the LM key when the LM response is sent
   NTLM::UseNTLM2_session  true               yes       Activate the 'Negotiate NTLM2 key' flag, forcing the use of a NTLMv2_session
   NTLM::UseNTLMv2         true               yes       Use NTLMv2 instead of NTLM2_session when 'Negotiate NTLM2' key is true
   Proxies                                    no        A proxy chain of format type:host:port[,type:host:port][...]
   SMB::AlwaysEncrypt      true               yes       Enforces encryption even if the server does not require it (SMB3.x only). Note that when it is set to false, the SMB client will still encrypt the communication if the server requires it
   SMB::ChunkSize          500                yes       The chunk size for SMB segments, bigger values will increase speed but break NT 4.0 and SMB signing
   SMB::Native_LM          Windows 2000 5.0   yes       The Native LM to send during authentication
   SMB::Native_OS          Windows 2000 2195  yes       The Native OS to send during authentication
   SMB::VerifySignature    false              yes       Enforces client-side verification of server response signatures
   SMBDomain               .                  no        The Windows domain to use for authentication
   SMBName                 *SMBSERVER         yes       The NetBIOS hostname (required for port 139 connections)
   SMBPass                                    no        The password for the specified username
   SMBUser                                    no        The username to authenticate as
   SSL                     false              no        Negotiate SSL/TLS for outgoing connections
   SSLCipher                                  no        String for SSL cipher - "DHE-RSA-AES256-SHA" or "ADH"
   SSLVerifyMode           PEER               no        SSL verification method (Accepted: CLIENT_ONCE, FAIL_IF_NO_PEER_CERT, NONE, PEER)
   SSLVersion              Auto               yes       Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2)
   ShowProgress            true               yes       Display progress messages during a scan
   ShowProgressPercent     10                 yes       The interval in percent that progress should be shown
   VERBOSE                 false              no        Enable detailed status messages
   WORKSPACE                                  no        Specify the workspace for this module

Auxiliary Actions

This is a list of all auxiliary actions that the scanner/smb/smb_version module can do:

msf6 auxiliary(scanner/smb/smb_version) > show actions

Auxiliary actions:

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

Evasion Options

Here is the full list of possible evasion options supported by the scanner/smb/smb_version auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 auxiliary(scanner/smb/smb_version) > show evasion

Module evasion options:

   Name                             Current Setting  Required  Description
   ----                             ---------------  --------  -----------
   DCERPC::fake_bind_multi          true             no        Use multi-context bind calls
   DCERPC::fake_bind_multi_append   0                no        Set the number of UUIDs to append the target
   DCERPC::fake_bind_multi_prepend  0                no        Set the number of UUIDs to prepend before the target
   DCERPC::max_frag_size            4096             yes       Set the DCERPC packet fragmentation size
   DCERPC::smb_pipeio               rw               no        Use a different delivery method for accessing named pipes (Accepted: rw, trans)
   SMB::obscure_trans_pipe_level    0                yes       Obscure PIPE string in TransNamedPipe (level 0-3)
   SMB::pad_data_level              0                yes       Place extra padding between headers and data (level 0-3)
   SMB::pad_file_level              0                yes       Obscure path names used in open/create (level 0-3)
   SMB::pipe_evasion                false            yes       Enable segmented read/writes for SMB Pipes
   SMB::pipe_read_max_size          1024             yes       Maximum buffer size for pipe reads
   SMB::pipe_read_min_size          1                yes       Minimum buffer size for pipe reads
   SMB::pipe_write_max_size         1024             yes       Maximum buffer size for pipe writes
   SMB::pipe_write_min_size         1                yes       Minimum buffer size for pipe writes
   TCP::max_send_size               0                no        Maxiumum tcp segment size.  (0 = disable)
   TCP::send_delay                  0                no        Delays inserted before every send.  (0 = disable)

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See Also

Check also the following modules related to this module:

Authors

  • hdm
  • Spencer McIntyre
  • Christophe De La Fuente

Version

This page has been produced using Metasploit Framework version 6.1.27-dev. For more modules, visit the Metasploit Module Library.

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