# -*- coding: utf-8 -*-
"""This file contains the NetworkList Registry plugin."""
import os
from dfdatetime import systemtime as dfdatetime_systemtime
from plaso.containers import events
from plaso.lib import dtfabric_helper
from plaso.lib import errors
from plaso.parsers import winreg_parser
from plaso.parsers.winreg_plugins import interface
[docs]
class WindowsRegistryNetworkListEventData(events.EventData):
"""Windows NetworkList event data.
Attributes:
connection_type (int): type of connection.
creation_time (dfdatetime.DateTimeValues): entry creation date and time.
default_gateway_mac (str): MAC address for the default gateway.
description (str): description of the wireless connection.
dns_suffix (str): DNS suffix.
key_path (str): Windows Registry key path.
last_connected_time (dfdatetime.DateTimeValues): last connected date and
time.
ssid (str): SSID of the connection.
"""
DATA_TYPE = 'windows:registry:network'
[docs]
def __init__(self):
"""Initializes event data."""
super(WindowsRegistryNetworkListEventData, self).__init__(
data_type=self.DATA_TYPE)
self.connection_type = None
self.creation_time = None
self.default_gateway_mac = None
self.description = None
self.dns_suffix = None
self.key_path = None
self.last_connected_time = None
self.ssid = None
[docs]
class NetworksWindowsRegistryPlugin(
interface.WindowsRegistryPlugin, dtfabric_helper.DtFabricHelper):
"""Windows Registry plugin for parsing the NetworkList key."""
NAME = 'networks'
DATA_FORMAT = 'Windows networks (NetworkList) Registry data'
FILTERS = frozenset([
interface.WindowsRegistryKeyPathFilter(
'HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows NT\\CurrentVersion'
'\\NetworkList')])
_DEFINITION_FILE = os.path.join(
os.path.dirname(__file__), 'systemtime.yaml')
_EMPTY_SYSTEM_TIME_TUPLE = (0, 0, 0, 0, 0, 0, 0, 0)
def _GetNetworkInfo(self, signatures_key):
"""Retrieves the network info within the signatures subkey.
Args:
signatures_key (dfwinreg.WinRegistryKey): a Windows Registry key.
Returns:
dict[str, tuple]: a tuple of default_gateway_mac and dns_suffix per
profile identifier (GUID).
"""
network_info = {}
for category in signatures_key.GetSubkeys():
for signature in category.GetSubkeys():
profile_guid_value = signature.GetValueByName('ProfileGuid')
if profile_guid_value:
profile_guid = profile_guid_value.GetDataAsObject()
else:
continue
default_gateway_mac_value = signature.GetValueByName(
'DefaultGatewayMac')
if default_gateway_mac_value:
default_gateway_mac = ':'.join([
f'{octet:02x}'
for octet in bytearray(default_gateway_mac_value.data)])
else:
default_gateway_mac = None
dns_suffix_value = signature.GetValueByName('DnsSuffix')
if dns_suffix_value:
dns_suffix = dns_suffix_value.GetDataAsObject()
else:
dns_suffix = None
network_info[profile_guid] = (default_gateway_mac, dns_suffix)
return network_info
def _ParseSystemTime(self, parser_mediator, registry_key, value_name):
"""Parses a SYSTEMTIME date and time value from a byte stream.
Args:
parser_mediator (ParserMediator): mediates interactions between parsers
and other components, such as storage and dfVFS.
registry_key (dfwinreg.WinRegistryKey): Windows Registry key.
value_name (str): name of the value to retrieve.
Returns:
dfdatetime.Systemtime: SYSTEMTIME date and time value or None if no
value is set.
Raises:
ParseError: if the SYSTEMTIME could not be parsed.
"""
registry_value = registry_key.GetValueByName(value_name)
if not registry_value:
return None
systemtime_map = self._GetDataTypeMap('systemtime')
try:
systemtime = self._ReadStructureFromByteStream(
registry_value.data, 0, systemtime_map)
except (ValueError, errors.ParseError) as exception:
parser_mediator.ProduceExtractionWarning((
f'Unable to parse SYSTEMTIME in value: {value_name:s} with error: '
f'{exception!s}'))
return None
system_time_tuple = (
systemtime.year, systemtime.month, systemtime.weekday,
systemtime.day_of_month, systemtime.hours, systemtime.minutes,
systemtime.seconds, systemtime.milliseconds)
if system_time_tuple == self._EMPTY_SYSTEM_TIME_TUPLE:
return None
try:
return dfdatetime_systemtime.Systemtime(
system_time_tuple=system_time_tuple)
except ValueError:
parser_mediator.ProduceExtractionWarning((
f'Invalid SYSTEMTIME value: {system_time_tuple!s} in value: '
f'{value_name:s}'))
return None
winreg_parser.WinRegistryParser.RegisterPlugin(NetworksWindowsRegistryPlugin)