plaso.analysis package

Submodules

plaso.analysis.chrome_extension module

A plugin that gather extension IDs from Chrome history browser.

class plaso.analysis.chrome_extension.ChromeExtensionPlugin[source]

Bases: plaso.analysis.interface.AnalysisPlugin

Convert Chrome extension IDs into names, requires Internet connection.

CompileReport(mediator)[source]

Compiles an analysis report.

Parameters:mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
Returns:analysis report.
Return type:AnalysisReport
ENABLE_IN_EXTRACTION = True
ExamineEvent(mediator, event)[source]

Analyzes an event.

Parameters:
  • mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
  • event (EventObject) – event to examine.
NAME = u'chrome_extension'

plaso.analysis.definitions module

This file contains the definitions for analysis plugins.

plaso.analysis.file_hashes module

A plugin to generate a list of unique hashes and paths.

class plaso.analysis.file_hashes.FileHashesPlugin[source]

Bases: plaso.analysis.interface.AnalysisPlugin

A plugin for generating a list of file paths and corresponding hashes.

CompileReport(mediator)[source]

Compiles an analysis report.

Parameters:mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
Returns:report.
Return type:AnalysisReport
ENABLE_IN_EXTRACTION = True
ExamineEvent(mediator, event)[source]

Analyzes an event and creates extracts hashes as required.

Parameters:
  • mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
  • event (EventObject) – event to examine.
NAME = u'file_hashes'

plaso.analysis.interface module

This file contains the interface for analysis plugins.

class plaso.analysis.interface.AnalysisPlugin[source]

Bases: object

Class that defines the analysis plugin interface.

CompileReport(mediator)[source]

Compiles a report of the analysis.

After the plugin has received every copy of an event to analyze this function will be called so that the report can be assembled.

Parameters:mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
Returns:report.
Return type:AnalysisReport
ENABLE_IN_EXTRACTION = False
ExamineEvent(mediator, event)[source]

Analyzes an event object.

Parameters:
  • mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
  • event (EventObject) – event.
NAME = u'analysis_plugin'
URLS = []
plugin_name

str – name of the plugin.

class plaso.analysis.interface.HTTPHashAnalyzer(hash_queue, hash_analysis_queue, **kwargs)[source]

Bases: plaso.analysis.interface.HashAnalyzer

Interface for hash analysis plugins that use HTTP(S)

Analyze(hashes)[source]

Analyzes a list of hashes.

Parameters:hashes (list[str]) – hashes to look up.
Returns:analysis results.
Return type:list[HashAnalysis]
MakeRequestAndDecodeJSON(url, method, **kwargs)[source]

Make a HTTP request and decode the results as JSON.

Parameters:
  • url (str) – URL to make a request to.
  • method (str) – HTTP method to used to make the request. GET and POST are supported.
  • kwargs – parameters to the requests .get() or post() methods, depending on the value of the method parameter.
Returns:

body of the HTTP response, decoded from JSON.

Return type:

dict[str, object]

Raises:
  • ConnectionError – If it is not possible to connect to the given URL, or it the request returns a HTTP error.
  • ValueError – If an invalid HTTP method is specified.
class plaso.analysis.interface.HashAnalysis(subject_hash, hash_information)[source]

Bases: object

Analysis information about a hash.

hash_information

object – object containing information about the hash.

subject_hash

str – hash that was analyzed.

class plaso.analysis.interface.HashAnalyzer(hash_queue, hash_analysis_queue, hashes_per_batch=1, lookup_hash=u'sha256', wait_after_analysis=0)[source]

Bases: threading.Thread

Class that defines the interfaces for hash analyzer threads.

This interface should be implemented once for each hash analysis plugin.

analyses_performed

int – number of analysis batches completed by this analyzer.

hashes_per_batch

int – maximum number of hashes to analyze at once.

lookup_hash

str – name of the hash attribute to look up.

seconds_spent_analyzing

int – number of seconds this analyzer has spent performing analysis (as opposed to waiting on queues, etc.)

wait_after_analysis

int – number of seconds the analyzer will sleep for after analyzing a batch of hashes.

Analyze(hashes)[source]

Analyzes a list of hashes.

Parameters:hashes (list[str]) – list of hashes to look up.
Returns:list of results of analyzing the hashes.
Return type:list[HashAnalysis]
EMPTY_QUEUE_WAIT_TIME = 4
SUPPORTED_HASHES = []
SetLookupHash(lookup_hash)[source]

Sets the hash to query.

Parameters:lookup_hash (str) – name of the hash attribute to look up.
Raises:ValueError – if the lookup hash is not supported.
SignalAbort()[source]

Instructs this analyzer to stop running.

run()[source]

The method called by the threading library to start the thread.

class plaso.analysis.interface.HashTaggingAnalysisPlugin(analyzer_class)[source]

Bases: plaso.analysis.interface.AnalysisPlugin

An interface for plugins that tag events based on the source file hash.

An implementation of this class should be paired with an implementation of the HashAnalyzer interface.

hash_analysis_queue

Queue.queue – queue that contains the results of analysis of file hashes.

hash_queue

Queue.queue – queue that contains file hashes.

CompileReport(mediator)[source]

Compiles an analysis report.

Parameters:mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
Returns:report.
Return type:AnalysisReport
DATA_TYPES = []
DEFAULT_QUEUE_TIMEOUT = 4
EstimateTimeRemaining()[source]

Estimates how long until all hashes have been analyzed.

Returns:estimated number of seconds until all hashes have been analyzed.
Return type:int
ExamineEvent(mediator, event)[source]

Evaluates whether an event contains the right data for a hash lookup.

Parameters:
  • mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
  • event (EventObject) – event.
GenerateLabels(hash_information)[source]

Generates a list of strings to tag events with.

Parameters:hash_information (object) – object that mediates the result of the analysis of a hash, as returned by the Analyze() method of the analyzer class associated with this plugin.
Returns:list of labels to apply to events.
Return type:list[str]
SECONDS_BETWEEN_STATUS_LOG_MESSAGES = 30
SetLookupHash(lookup_hash)[source]

Sets the hash to query.

Parameters:lookup_hash (str) – name of the hash attribute to look up.

plaso.analysis.logger module

The analysis sub module logger.

plaso.analysis.manager module

This file contains the analysis plugin manager class.

class plaso.analysis.manager.AnalysisPluginManager[source]

Bases: object

Analysis plugin manager.

classmethod DeregisterPlugin(plugin_class)[source]

Deregisters an analysis plugin class.

The analysis plugin classes are identified by their lower case name.

Parameters:plugin_class (type) – class of the analysis plugin.
Raises:KeyError – if an analysis plugin class is not set for the corresponding name.
classmethod GetAllPluginInformation(show_all=True)[source]

Retrieves a list of the registered analysis plugins.

Parameters:show_all (Optional[bool]) – True if all analysis plugin names should be listed.
Returns:
the name, docstring and type string of each
analysis plugin in alphabetical order.
Return type:list[tuple[str, str, str]]
classmethod GetPluginNames()[source]

Retrieves the analysis plugin names.

Returns:analysis plugin names.
Return type:list[str]
classmethod GetPluginObjects(plugin_names)[source]

Retrieves the plugin objects.

Parameters:plugin_names (list[str]) – names of plugins that should be retrieved.
Returns:analysis plugins per name.
Return type:dict[str, AnalysisPlugin]
classmethod GetPlugins()[source]

Retrieves the registered analysis plugin classes.

Yields:

tuple

containing:

str: name of the plugin type: plugin class

classmethod RegisterPlugin(plugin_class)[source]

Registers an analysis plugin class.

Then analysis plugin classes are identified based on their lower case name.

Parameters:plugin_class (type) – class of the analysis plugin.
Raises:KeyError – if an analysis plugin class is already set for the corresponding name.
classmethod RegisterPlugins(plugin_classes)[source]

Registers analysis plugin classes.

The analysis plugin classes are identified based on their lower case name.

Parameters:plugin_classes (list[type]) – classes of the analysis plugin.
Raises:KeyError – if an analysis plugin class is already set for the corresponding name.

plaso.analysis.mediator module

The analysis plugin mediator object.

class plaso.analysis.mediator.AnalysisMediator(storage_writer, knowledge_base, data_location=None)[source]

Bases: object

Analysis plugin mediator.

last_activity_timestamp

int – timestamp received that indicates the last time activity was observed. The last activity timestamp is updated when the mediator produces an attribute container, such as an event tag. This timestamp is used by the multi processing worker process to indicate the last time the worker was known to be active. This information is then used by the foreman to detect workers that are not responding (stalled).

number_of_produced_analysis_reports

int – number of produced analysis reports.

number_of_produced_event_tags

int – number of produced event tags.

GetDisplayNameForPathSpec(path_spec)[source]

Retrieves the display name for a path specification.

Parameters:path_spec (dfvfs.PathSpec) – path specification.
Returns:human readable version of the path specification.
Return type:str
GetUsernameForPath(path)[source]

Retrieves a username for a specific path.

This is determining if a specific path is within a user’s directory and returning the username of the user if so.

Parameters:path (str) – path.
Returns:
username or None if the path does not appear to be within a user’s
directory.
Return type:str
ProduceAnalysisReport(plugin)[source]

Produces an analysis report.

Parameters:plugin (AnalysisPlugin) – plugin.
ProduceEventTag(event_tag)[source]

Produces an event tag.

Parameters:event_tag (EventTag) – event tag.
SignalAbort()[source]

Signals the analysis plugins to abort.

abort

bool – True if the analysis should be aborted.

data_location

str – path to the data files.

operating_system

str – operating system or None if not set.

plaso.analysis.nsrlsvr module

Analysis plugin to look up files in nsrlsvr and tag events.

class plaso.analysis.nsrlsvr.NsrlsvrAnalysisPlugin[source]

Bases: plaso.analysis.interface.HashTaggingAnalysisPlugin

Analysis plugin for looking up hashes in nsrlsvr.

DATA_TYPES = [u'fs:stat', u'fs:stat:ntfs']
GenerateLabels(hash_information)[source]

Generates a list of strings that will be used in the event tag.

Parameters:hash_information (bool) – whether the analyzer received a response from nsrlsvr indicating that the hash was present in its loaded NSRL set.
Returns:strings describing the results from nsrlsvr.
Return type:list[str]
NAME = u'nsrlsvr'
SetHost(host)[source]

Sets the address or hostname of the server running nsrlsvr.

Parameters:host (str) – IP address or hostname to query.
SetLabel(label)[source]

Sets the tagging label.

Parameters:label (str) – label to apply to events extracted from files that are present in nsrlsvr.
SetPort(port)[source]

Sets the port where nsrlsvr is listening.

Parameters:port (int) – port to query.
TestConnection()[source]

Tests the connection to nsrlsvr.

Returns:True if nsrlsvr instance is reachable.
Return type:bool
URLS = [u'https://rjhansen.github.io/nsrlsvr/']
class plaso.analysis.nsrlsvr.NsrlsvrAnalyzer(hash_queue, hash_analysis_queue, **kwargs)[source]

Bases: plaso.analysis.interface.HashAnalyzer

Analyzes file hashes by consulting an nsrlsvr instance.

analyses_performed

int – number of analysis batches completed by this analyzer.

hashes_per_batch

int – maximum number of hashes to analyze at once.

seconds_spent_analyzing

int – number of seconds this analyzer has spent performing analysis (as opposed to waiting on queues, etc.)

wait_after_analysis

int – number of seconds the analyzer will sleep for after analyzing a batch of hashes.

Analyze(hashes)[source]

Looks up hashes in nsrlsvr.

Parameters:hashes (list[str]) – hash values to look up.
Returns:analysis results, or an empty list on error.
Return type:list[HashAnalysis]
SUPPORTED_HASHES = [u'md5', u'sha1']
SetHost(host)[source]

Sets the address or hostname of the server running nsrlsvr.

Parameters:host (str) – IP address or hostname to query.
SetPort(port)[source]

Sets the port where nsrlsvr is listening.

Parameters:port (int) – port to query.
TestConnection()[source]

Tests the connection to nsrlsvr.

Checks if a connection can be set up and queries the server for the MD5 of an empty file and expects a response. The value of the response is not checked.

Returns:True if nsrlsvr instance is reachable.
Return type:bool

plaso.analysis.sessionize module

A plugin to tag events according to rules in a tag file.

class plaso.analysis.sessionize.SessionizeAnalysisPlugin[source]

Bases: plaso.analysis.interface.AnalysisPlugin

Analysis plugin that labels events by session.

CompileReport(mediator)[source]

Compiles an analysis report.

Parameters:mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
Returns:analysis report.
Return type:AnalysisReport
ENABLE_IN_EXTRACTION = False
ExamineEvent(mediator, event)[source]

Analyzes an EventObject and tags it as part of a session.

Parameters:
  • mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
  • event (EventObject) – event to examine.
NAME = u'sessionize'
SetMaximumPause(maximum_pause_minutes)[source]

Sets the maximum pause interval between events to consider a session.

Parameters:maximum_pause_minutes (int) – maximum gap between events that are part of the same session, in minutes.

plaso.analysis.tagging module

A plugin to tag events according to rules in a tagging file.

class plaso.analysis.tagging.TaggingAnalysisPlugin[source]

Bases: plaso.analysis.interface.AnalysisPlugin

Analysis plugin that tags events according to rules in a tagging file.

CompileReport(mediator)[source]

Compiles an analysis report.

Parameters:mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
Returns:analysis report.
Return type:AnalysisReport
ENABLE_IN_EXTRACTION = True
ExamineEvent(mediator, event)[source]

Analyzes an EventObject and tags it according to rules in the tag file.

Parameters:
  • mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
  • event (EventObject) – event to examine.
NAME = u'tagging'
SetAndLoadTagFile(tagging_file_path)[source]

Sets the tag file to be used by the plugin.

Parameters:tagging_file_path (str) – path of the tagging file.

plaso.analysis.unique_domains_visited module

A plugin to generate a list of domains visited.

class plaso.analysis.unique_domains_visited.UniqueDomainsVisitedPlugin[source]

Bases: plaso.analysis.interface.AnalysisPlugin

A plugin to generate a list all domains visited.

This plugin will extract domains from browser history events extracted by Plaso. The list produced can be used to quickly determine if there has been a visit to a site of interest, for example, a known phishing site.

CompileReport(mediator)[source]

Compiles an analysis report.

Parameters:mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
Returns:the analysis report.
Return type:AnalysisReport
ENABLE_IN_EXTRACTION = True
ExamineEvent(mediator, event)[source]

Analyzes an event and extracts domains from it.

We only evaluate straightforward web history events, not visits which can be inferred by TypedURLs, cookies or other means.

Parameters:
  • mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
  • event (EventObject) – event to examine.
NAME = u'unique_domains_visited'

plaso.analysis.viper module

Analysis plugin to look up files in Viper and tag events.

class plaso.analysis.viper.ViperAnalysisPlugin[source]

Bases: plaso.analysis.interface.HashTaggingAnalysisPlugin

An analysis plugin for looking up SHA256 hashes in Viper.

DATA_TYPES = [u'pe:compilation:compilation_time']
GenerateLabels(hash_information)[source]

Generates a list of strings that will be used in the event tag.

Parameters:hash_information (dict[str, object]) – JSON decoded contents of the result of a Viper lookup, as produced by the ViperAnalyzer.
Returns:list of labels to apply to events.
Return type:list[str]
NAME = u'viper'
SetHost(host)[source]

Sets the address or hostname of the server running Viper server.

Parameters:host (str) – IP address or hostname to query.
SetPort(port)[source]

Sets the port where Viper server is listening.

Parameters:port (int) – port to query.
SetProtocol(protocol)[source]

Sets the protocol that will be used to query Viper.

Parameters:protocol (str) – protocol to use to query Viper. Either ‘http’ or ‘https’.
Raises:ValueError – If an invalid protocol is selected.
TestConnection()[source]

Tests the connection to the Viper server.

Returns:True if the Viper server instance is reachable.
Return type:bool
URLS = [u'https://viper.li']
class plaso.analysis.viper.ViperAnalyzer(hash_queue, hash_analysis_queue, **kwargs)[source]

Bases: plaso.analysis.interface.HTTPHashAnalyzer

Class that analyzes file hashes by consulting Viper.

REST API reference:
https://viper-framework.readthedocs.org/en/latest/usage/web.html#api
Analyze(hashes)[source]

Looks up hashes in Viper using the Viper HTTP API.

Parameters:hashes (list[str]) – hashes to look up.
Returns:hash analysis.
Return type:list[HashAnalysis]
Raises:RuntimeError – If no host has been set for Viper.
SUPPORTED_HASHES = [u'md5', u'sha256']
SUPPORTED_PROTOCOLS = [u'http', u'https']
SetHost(host)[source]

Sets the address or hostname of the server running Viper server.

Parameters:host (str) – IP address or hostname to query.
SetPort(port)[source]

Sets the port where Viper server is listening.

Parameters:port (int) – port to query.
SetProtocol(protocol)[source]

Sets the protocol that will be used to query Viper.

Parameters:protocol (str) – protocol to use to query Viper. Either ‘http’ or ‘https’.
Raises:ValueError – if the protocol is not supported.
TestConnection()[source]

Tests the connection to the Viper server.

Returns:True if the Viper server instance is reachable.
Return type:bool

plaso.analysis.virustotal module

Analysis plugin to look up files in VirusTotal and tag events.

class plaso.analysis.virustotal.VirusTotalAnalysisPlugin[source]

Bases: plaso.analysis.interface.HashTaggingAnalysisPlugin

An analysis plugin for looking up hashes in VirusTotal.

DATA_TYPES = [u'pe:compilation:compilation_time']
EnableFreeAPIKeyRateLimit()[source]

Configures Rate limiting for queries to VirusTotal.

The default rate limit for free VirusTotal API keys is 4 requests per minute.

GenerateLabels(hash_information)[source]

Generates a list of strings that will be used in the event tag.

Parameters:hash_information (dict[str, object]) – the JSON decoded contents of the result of a VirusTotal lookup, as produced by the VirusTotalAnalyzer.
Returns:strings describing the results from VirusTotal.
Return type:list[str]
NAME = u'virustotal'
SetAPIKey(api_key)[source]

Sets the VirusTotal API key to use in queries.

Parameters:api_key (str) – VirusTotal API key
TestConnection()[source]

Tests the connection to VirusTotal

Returns:True if VirusTotal is reachable.
Return type:bool
URLS = [u'https://virustotal.com']
class plaso.analysis.virustotal.VirusTotalAnalyzer(hash_queue, hash_analysis_queue, **kwargs)[source]

Bases: plaso.analysis.interface.HTTPHashAnalyzer

Class that analyzes file hashes by consulting VirusTotal.

Analyze(hashes)[source]

Looks up hashes in VirusTotal using the VirusTotal HTTP API.

The API is documented here:
https://www.virustotal.com/en/documentation/public-api/
Parameters:hashes (list[str]) – hashes to look up.
Returns:analysis results.
Return type:list[HashAnalysis]
Raises:RuntimeError – If the VirusTotal API key has not been set.
SUPPORTED_HASHES = [u'md5', u'sha1', u'sha256']
SetAPIKey(api_key)[source]

Sets the VirusTotal API key to use in queries.

Parameters:api_key (str) – VirusTotal API key
TestConnection()[source]

Tests the connection to VirusTotal

Returns:True if VirusTotal is reachable.
Return type:bool

plaso.analysis.windows_services module

A plugin to enable quick triage of Windows Services.

class plaso.analysis.windows_services.WindowsServiceCollection[source]

Bases: object

Class to hold and de-duplicate Windows Services.

AddService(new_service)[source]

Add a new service to the list of ones we know about.

Parameters:new_service (WindowsService) – the service to add.
services

list[WindowsService] – services in this collection.

class plaso.analysis.windows_services.WindowsServicesAnalysisPlugin[source]

Bases: plaso.analysis.interface.AnalysisPlugin

Provides a single list of for Windows services found in the Registry.

CompileReport(mediator)[source]

Compiles an analysis report.

Parameters:mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
Returns:report.
Return type:AnalysisReport
ENABLE_IN_EXTRACTION = True
ExamineEvent(mediator, event)[source]

Analyzes an event and creates Windows Services as required.

At present, this method only handles events extracted from the Registry.
Parameters:
  • mediator (AnalysisMediator) – mediates interactions between analysis plugins and other components, such as storage and dfvfs.
  • event (EventObject) – event to examine.
NAME = u'windows_services'
SetOutputFormat(output_format)[source]

Sets the output format of the generated report.

Parameters:output_format (str) – The format the the plugin should used to produce its output.

Module contents

This file imports Python modules that register analysis plugins.