# -*- coding: utf-8 -*-
"""This file contains the Winlogon Registry plugin."""
from plaso.containers import events
from plaso.parsers import winreg_parser
from plaso.parsers.winreg_plugins import interface
[docs]
class WinlogonEventData(events.EventData):
"""Winlogon event data attribute container.
Attributes:
application (str): Winlogon application.
command (str): Winlogon command.
handler (str): Winlogon handler.
key_path (str): Windows Registry key path.
last_written_time (dfdatetime.DateTimeValues): entry last written date and
time.
trigger (str): Winlogon trigger.
"""
DATA_TYPE = 'windows:registry:winlogon'
[docs]
def __init__(self):
"""Initializes event data."""
super(WinlogonEventData, self).__init__(data_type=self.DATA_TYPE)
self.application = None
self.command = None
self.handler = None
self.key_path = None
self.last_written_time = None
self.trigger = None
[docs]
class WinlogonPlugin(interface.WindowsRegistryPlugin):
"""Windows Registry plugin for parsing the Winlogon key."""
NAME = 'winlogon'
DATA_FORMAT = 'Windows log-on Registry data'
FILTERS = frozenset([
interface.WindowsRegistryKeyPathFilter(
'HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows NT\\CurrentVersion'
'\\Winlogon')])
# Sort the value names to ensure event_data is generated in a deterministic
# manner.
_LOGON_APPLICATIONS = sorted([
'Shell', 'Userinit', 'AppSetup', 'GinaDLL', 'System', 'VmApplet',
'taskman', 'UIHost'])
_TRIGGER_VALUE_NAMES = sorted([
'Lock', 'Logoff', 'Logon', 'Shutdown', 'SmartCardLogonNotify',
'StartScreenSaver', 'StartShell', 'Startup', 'StopScreenSaver',
'Unlock'])
def _ParseRegisteredDLLs(self, parser_mediator, notify_subkey):
"""Parses the registered DLLs that receive event notifications.
Args:
parser_mediator (ParserMediator): mediates interactions between parsers
and other components, such as storage and dfVFS.
notify_subkey (dfwinreg.WinRegistryKey): Notify Windows Registry subkey.
"""
for subkey in notify_subkey.GetSubkeys():
for value_name in self._TRIGGER_VALUE_NAMES:
handler_value = subkey.GetValueByName(value_name)
if not handler_value:
# TODO: generate extraction warning.
continue
# TODO: check data type handler.
event_data = WinlogonEventData()
event_data.application = subkey.name
event_data.command = self._GetValueFromKey(subkey, 'DllName')
event_data.handler = handler_value.GetDataAsObject()
event_data.key_path = subkey.path
event_data.last_written_time = subkey.last_written_time
# TODO: refactor make trigger a list of value names.
event_data.trigger = value_name
parser_mediator.ProduceEventData(event_data)
def _ParseLogonApplications(self, parser_mediator, registry_key):
"""Parses the registered logon applications.
Args:
parser_mediator (ParserMediator): mediates interactions between parsers
and other components, such as storage and dfVFS.
registry_key (dfwinreg.WinRegistryKey): Windows Registry key.
"""
for application in self._LOGON_APPLICATIONS:
command_value = registry_key.GetValueByName(application)
if not command_value:
# TODO: generate extraction warning.
continue
event_data = WinlogonEventData()
event_data.application = application
# TODO: refactor make command a list of command values.
event_data.command = command_value.GetDataAsObject()
event_data.key_path = registry_key.path
event_data.last_written_time = registry_key.last_written_time
event_data.trigger = 'Logon'
parser_mediator.ProduceEventData(event_data)
winreg_parser.WinRegistryParser.RegisterPlugin(WinlogonPlugin)