mirror of
https://github.com/elisspace/autopsy.git
synced 2026-09-14 15:06:46 +00:00
Mark McKinnon
453
InternalPythonModules/android/skype.py
Normal file
453
InternalPythonModules/android/skype.py
Normal file
@@ -0,0 +1,453 @@
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"""
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Autopsy Forensic Browser
|
||||
|
||||
Copyright 2019-2020 Basis Technology Corp.
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Contact: carrier <at> sleuthkit <dot> org
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||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
|
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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||||
See the License for the specific language governing permissions and
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limitations under the License.
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"""
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from java.io import File
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from java.lang import Class
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from java.lang import ClassNotFoundException
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from java.lang import Long
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from java.lang import String
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from java.sql import ResultSet
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from java.sql import SQLException
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from java.sql import Statement
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from java.util.logging import Level
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from java.util import ArrayList
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from org.apache.commons.codec.binary import Base64
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from org.sleuthkit.autopsy.casemodule import Case
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from org.sleuthkit.autopsy.coreutils import Logger
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from org.sleuthkit.autopsy.coreutils import MessageNotifyUtil
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from org.sleuthkit.autopsy.coreutils import AppSQLiteDB
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from org.sleuthkit.autopsy.datamodel import ContentUtils
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from org.sleuthkit.autopsy.ingest import IngestJobContext
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from org.sleuthkit.datamodel import AbstractFile
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from org.sleuthkit.datamodel import BlackboardArtifact
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from org.sleuthkit.datamodel import BlackboardAttribute
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from org.sleuthkit.datamodel import Content
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from org.sleuthkit.datamodel import TskCoreException
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from org.sleuthkit.datamodel.Blackboard import BlackboardException
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from org.sleuthkit.autopsy.casemodule import NoCurrentCaseException
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from org.sleuthkit.datamodel import Account
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from org.sleuthkit.datamodel.blackboardutils import CommunicationArtifactsHelper
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from org.sleuthkit.datamodel.blackboardutils.CommunicationArtifactsHelper import MessageReadStatus
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from org.sleuthkit.datamodel.blackboardutils.CommunicationArtifactsHelper import CommunicationDirection
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from org.sleuthkit.datamodel.blackboardutils.attributes import MessageAttachments
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from org.sleuthkit.datamodel.blackboardutils.attributes.MessageAttachments import FileAttachment
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from TskMessagesParser import TskMessagesParser
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from TskContactsParser import TskContactsParser
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from TskCallLogsParser import TskCallLogsParser
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import traceback
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import general
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class SkypeAnalyzer(general.AndroidComponentAnalyzer):
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"""
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Parses the Skype App databases for TSK contacts, message
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and calllog artifacts.
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About version 8.15.0.428 (9/17/2019) Skype database:
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- There are 4 tables this parser uses:
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1) person - this table appears to hold all contacts known to the user.
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2) user - this table holds information about the user.
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3) particiapnt - Yes, that is not a typo. This table maps group chat
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ids to skype ids (1 to many).
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4) chatItem - This table contains all messages. It maps the group id or
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skype id (for 1 to 1 communication) to the message content
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and metadata. Either the group id or skype id is stored in
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a column named 'conversation_link'.
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More info and implementation details:
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- The person table does not include groups. To get
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all 1 to 1 communications, we could simply join the person and chatItem tables.
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This would mean we'd need to do a second pass to get all the group information
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as they would be excluded in the join. Since the chatItem table stores both the
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group id or skype_id in one column, an implementation decision was made to union
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the person and particiapnt table together so that all rows are matched in one join
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with chatItem. This result is consistently labeled contact_book_w_groups in the
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following queries.
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"""
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def __init__(self):
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self._logger = Logger.getLogger(self.__class__.__name__)
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self._SKYPE_PACKAGE_NAME = "com.skype.raider"
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self._PARSER_NAME = "Skype Parser"
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self._VERSION = "8.15.0.428"
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def get_user_account(self, skype_db):
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account_query_result = skype_db.runQuery(
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"""
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SELECT entry_id,
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CASE
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WHEN Ifnull(first_name, "") == "" AND Ifnull(last_name, "") == "" THEN entry_id
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WHEN first_name is NULL THEN replace(last_name, ",", "")
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WHEN last_name is NULL THEN replace(first_name, ",", "")
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ELSE replace(first_name, ",", "") || " " || replace(last_name, ",", "")
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END AS name
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FROM user
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"""
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)
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if account_query_result is not None and account_query_result.next():
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return account_query_result.getString("entry_id")
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return None
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def analyze(self, dataSource, fileManager, context):
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#Skype databases are of the form: live:XYZ.db, where
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#XYZ is the skype id of the user. The following search
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#does a generic substring match for 'live' in the skype
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#package.
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skype_dbs = AppSQLiteDB.findAppDatabases(dataSource,
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"live:", False, self._SKYPE_PACKAGE_NAME)
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try:
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for skype_db in skype_dbs:
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#Attempt to get the user account id from the database
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user_account_instance = None
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try:
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user_account_instance = self.get_user_account(skype_db)
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except SQLException as ex:
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self._logger.log(Level.WARNING,
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"Error querying for the user account in the Skype db.", ex)
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self._logger.log(Level.WARNING, traceback.format_exc())
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current_case = Case.getCurrentCaseThrows()
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if user_account_instance is None:
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helper = CommunicationArtifactsHelper(
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current_case.getSleuthkitCase(), self._PARSER_NAME,
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skype_db.getDBFile(), Account.Type.SKYPE
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)
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else:
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helper = CommunicationArtifactsHelper(
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current_case.getSleuthkitCase(), self._PARSER_NAME,
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skype_db.getDBFile(), Account.Type.SKYPE,
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Account.Type.SKYPE, user_account_instance
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)
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self.parse_contacts(skype_db, helper)
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self.parse_calllogs(skype_db, helper)
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self.parse_messages(skype_db, helper, current_case)
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except NoCurrentCaseException as ex:
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self._logger.log(Level.WARNING, "No case currently open.", ex)
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self._logger.log(Level.WARNING, traceback.format_exc())
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for skype_db in skype_dbs:
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skype_db.close()
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def parse_contacts(self, skype_db, helper):
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#Query for contacts and iterate row by row adding
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#each contact artifact
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try:
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contacts_parser = SkypeContactsParser(skype_db, self._PARSER_NAME)
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while contacts_parser.next():
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helper.addContact(
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contacts_parser.get_contact_name(),
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contacts_parser.get_phone(),
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contacts_parser.get_home_phone(),
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contacts_parser.get_mobile_phone(),
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contacts_parser.get_email(),
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contacts_parser.get_other_attributes()
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)
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contacts_parser.close()
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except SQLException as ex:
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#Error parsing Skype db
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self._logger.log(Level.WARNING,
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"Error parsing contact database for call logs artifacts.", ex)
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self._logger.log(Level.WARNING, traceback.format_exc())
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except TskCoreException as ex:
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#Severe error trying to add to case database.. case is not complete.
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#These exceptions are thrown by the CommunicationArtifactsHelper.
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self._logger.log(Level.SEVERE,
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"Failed to add contact artifacts to the case database.", ex)
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self._logger.log(Level.SEVERE, traceback.format_exc())
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except BlackboardException as ex:
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#Failed to post notification to blackboard
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self._logger.log(Level.WARNING,
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"Failed to post contact artifact to the blackboard", ex)
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self._logger.log(Level.WARNING, traceback.format_exc())
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def parse_calllogs(self, skype_db, helper):
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#Query for call logs and iterate row by row adding
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#each call log artifact
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try:
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calllog_parser = SkypeCallLogsParser(skype_db)
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while calllog_parser.next():
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helper.addCalllog(
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calllog_parser.get_call_direction(),
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calllog_parser.get_phone_number_from(),
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calllog_parser.get_phone_number_to(),
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calllog_parser.get_call_start_date_time(),
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calllog_parser.get_call_end_date_time(),
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calllog_parser.get_call_type()
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)
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calllog_parser.close()
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except SQLException as ex:
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#Error parsing Skype db
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self._logger.log(Level.WARNING,
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"Error parsing Skype database for call logs artifacts.", ex)
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self._logger.log(Level.WARNING, traceback.format_exc())
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except TskCoreException as ex:
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#Severe error trying to add to case database.. case is not complete.
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#These exceptions are thrown by the CommunicationArtifactsHelper.
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self._logger.log(Level.SEVERE,
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"Failed to add call log artifacts to the case database.", ex)
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self._logger.log(Level.SEVERE, traceback.format_exc())
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except BlackboardException as ex:
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#Failed to post notification to blackboard
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self._logger.log(Level.WARNING,
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"Failed to post call log artifact to the blackboard", ex)
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self._logger.log(Level.WARNING, traceback.format_exc())
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def parse_messages(self, skype_db, helper, current_case):
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#Query for messages and iterate row by row adding
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#each message artifact
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try:
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messages_parser = SkypeMessagesParser(skype_db)
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while messages_parser.next():
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message_artifact = helper.addMessage(
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messages_parser.get_message_type(),
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messages_parser.get_message_direction(),
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messages_parser.get_phone_number_from(),
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messages_parser.get_phone_number_to(),
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messages_parser.get_message_date_time(),
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messages_parser.get_message_read_status(),
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messages_parser.get_message_subject(),
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messages_parser.get_message_text(),
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messages_parser.get_thread_id()
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)
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if (messages_parser.get_file_attachment() is not None):
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file_attachments = ArrayList()
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file_attachments.add(FileAttachment(current_case.getSleuthkitCase(), skype_db.getDBFile().getDataSource(), messages_parser.get_file_attachment()))
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message_attachments = MessageAttachments(file_attachments, [])
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helper.addAttachments(message_artifact, message_attachments)
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messages_parser.close()
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except SQLException as ex:
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#Error parsing Skype db
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self._logger.log(Level.WARNING,
|
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"Error parsing Skype database for message artifacts.", ex)
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self._logger.log(Level.WARNING, traceback.format_exc())
|
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except TskCoreException as ex:
|
||||
#Severe error trying to add to case database.. case is not complete.
|
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#These exceptions are thrown by the CommunicationArtifactsHelper.
|
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self._logger.log(Level.SEVERE,
|
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"Failed to add message artifacts to the case database.", ex)
|
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self._logger.log(Level.SEVERE, traceback.format_exc())
|
||||
except BlackboardException as ex:
|
||||
#Failed to post notification to blackboard
|
||||
self._logger.log(Level.WARNING,
|
||||
"Failed to post message artifact to the blackboard", ex)
|
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self._logger.log(Level.WARNING, traceback.format_exc())
|
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|
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class SkypeCallLogsParser(TskCallLogsParser):
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"""
|
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Extracts TSK_CALLLOG information from the Skype database.
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TSK_CALLLOG fields that are not in the Skype database are given
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a default value inherited from the super class.
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"""
|
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|
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def __init__(self, calllog_db):
|
||||
"""
|
||||
Implementation details:
|
||||
- message_type w/ value 3 appeared to be the call type, regardless
|
||||
of if it was audio or video.
|
||||
|
||||
"""
|
||||
super(SkypeCallLogsParser, self).__init__(calllog_db.runQuery(
|
||||
"""
|
||||
SELECT contact_book_w_groups.conversation_id,
|
||||
contact_book_w_groups.participant_ids,
|
||||
messages.time,
|
||||
messages.duration,
|
||||
messages.is_sender_me,
|
||||
messages.person_id AS sender_id
|
||||
FROM (SELECT conversation_id,
|
||||
Group_concat(person_id) AS participant_ids
|
||||
FROM particiapnt
|
||||
GROUP BY conversation_id
|
||||
UNION
|
||||
SELECT entry_id AS conversation_id,
|
||||
NULL
|
||||
FROM person) AS contact_book_w_groups
|
||||
join chatitem AS messages
|
||||
ON messages.conversation_link = contact_book_w_groups.conversation_id
|
||||
WHERE message_type == 3
|
||||
"""
|
||||
)
|
||||
)
|
||||
self._INCOMING_CALL_TYPE = 0
|
||||
self._OUTGOING_CALL_TYPE = 1
|
||||
|
||||
|
||||
def get_phone_number_from(self):
|
||||
if self.get_call_direction() == self.INCOMING_CALL:
|
||||
return self.result_set.getString("sender_id")
|
||||
|
||||
def get_phone_number_to(self):
|
||||
if self.get_call_direction() == self.OUTGOING_CALL:
|
||||
group_ids = self.result_set.getString("participant_ids")
|
||||
|
||||
if group_ids is not None:
|
||||
group_ids = group_ids.split(",")
|
||||
return group_ids
|
||||
|
||||
return self.result_set.getString("conversation_id")
|
||||
|
||||
return super(SkypeCallLogsParser, self).get_phone_number_to()
|
||||
|
||||
def get_call_direction(self):
|
||||
direction = self.result_set.getInt("is_sender_me")
|
||||
if direction == self._INCOMING_CALL_TYPE:
|
||||
return self.INCOMING_CALL
|
||||
if direction == self._OUTGOING_CALL_TYPE:
|
||||
return self.OUTGOING_CALL
|
||||
return super(SkypeCallLogsParser, self).get_call_direction()
|
||||
|
||||
def get_call_start_date_time(self):
|
||||
return self.result_set.getLong("time") / 1000
|
||||
|
||||
def get_call_end_date_time(self):
|
||||
start = self.get_call_start_date_time()
|
||||
duration = self.result_set.getInt("duration") / 1000
|
||||
return start + duration
|
||||
|
||||
class SkypeContactsParser(TskContactsParser):
|
||||
"""
|
||||
Extracts TSK_CONTACT information from the Skype database.
|
||||
TSK_CONTACT fields that are not in the Skype database are given
|
||||
a default value inherited from the super class.
|
||||
"""
|
||||
|
||||
def __init__(self, contact_db, analyzer):
|
||||
super(SkypeContactsParser, self).__init__(contact_db.runQuery(
|
||||
"""
|
||||
SELECT entry_id,
|
||||
CASE
|
||||
WHEN Ifnull(first_name, "") == "" AND Ifnull(last_name, "") == "" THEN entry_id
|
||||
WHEN first_name is NULL THEN replace(last_name, ",", "")
|
||||
WHEN last_name is NULL THEN replace(first_name, ",", "")
|
||||
ELSE replace(first_name, ",", "") || " " || replace(last_name, ",", "")
|
||||
END AS name
|
||||
FROM person
|
||||
"""
|
||||
)
|
||||
)
|
||||
self._PARENT_ANALYZER = analyzer
|
||||
|
||||
def get_contact_name(self):
|
||||
return self.result_set.getString("name")
|
||||
|
||||
def get_other_attributes(self):
|
||||
return [BlackboardAttribute(
|
||||
BlackboardAttribute.ATTRIBUTE_TYPE.TSK_ID,
|
||||
self._PARENT_ANALYZER,
|
||||
self.result_set.getString("entry_id"))]
|
||||
|
||||
|
||||
class SkypeMessagesParser(TskMessagesParser):
|
||||
"""
|
||||
Extract TSK_MESSAGE information from the Skype database.
|
||||
TSK_CONTACT fields that are not in the Skype database are given
|
||||
a default value inherited from the super class.
|
||||
"""
|
||||
|
||||
def __init__(self, message_db):
|
||||
"""
|
||||
This query is very similar to the call logs query, the only difference is
|
||||
it grabs more columns in the SELECT and excludes message_types which have
|
||||
the call type value (3).
|
||||
"""
|
||||
super(SkypeMessagesParser, self).__init__(message_db.runQuery(
|
||||
"""
|
||||
SELECT contact_book_w_groups.conversation_id,
|
||||
contact_book_w_groups.participant_ids,
|
||||
messages.time,
|
||||
messages.content,
|
||||
messages.device_gallery_path,
|
||||
messages.is_sender_me,
|
||||
messages.person_id as sender_id
|
||||
FROM (SELECT conversation_id,
|
||||
Group_concat(person_id) AS participant_ids
|
||||
FROM particiapnt
|
||||
GROUP BY conversation_id
|
||||
UNION
|
||||
SELECT entry_id as conversation_id,
|
||||
NULL
|
||||
FROM person) AS contact_book_w_groups
|
||||
JOIN chatitem AS messages
|
||||
ON messages.conversation_link = contact_book_w_groups.conversation_id
|
||||
WHERE message_type != 3
|
||||
"""
|
||||
)
|
||||
)
|
||||
self._SKYPE_MESSAGE_TYPE = "Skype Message"
|
||||
self._OUTGOING_MESSAGE_TYPE = 1
|
||||
self._INCOMING_MESSAGE_TYPE = 0
|
||||
|
||||
def get_message_type(self):
|
||||
return self._SKYPE_MESSAGE_TYPE
|
||||
|
||||
def get_phone_number_from(self):
|
||||
if self.get_message_direction() == self.INCOMING:
|
||||
return self.result_set.getString("sender_id")
|
||||
return super(SkypeMessagesParser, self).get_phone_number_from()
|
||||
|
||||
def get_message_direction(self):
|
||||
direction = self.result_set.getInt("is_sender_me")
|
||||
if direction == self._OUTGOING_MESSAGE_TYPE:
|
||||
return self.OUTGOING
|
||||
if direction == self._INCOMING_MESSAGE_TYPE:
|
||||
return self.INCOMING
|
||||
return super(SkypeMessagesParser, self).get_message_direction()
|
||||
|
||||
def get_phone_number_to(self):
|
||||
if self.get_message_direction() == self.OUTGOING:
|
||||
group_ids = self.result_set.getString("participant_ids")
|
||||
|
||||
if group_ids is not None:
|
||||
group_ids = group_ids.split(",")
|
||||
return group_ids
|
||||
|
||||
return self.result_set.getString("conversation_id")
|
||||
|
||||
return super(SkypeMessagesParser, self).get_phone_number_to()
|
||||
|
||||
def get_message_date_time(self):
|
||||
date = self.result_set.getLong("time")
|
||||
return date / 1000
|
||||
|
||||
def get_message_text(self):
|
||||
content = self.result_set.getString("content")
|
||||
|
||||
if content is not None:
|
||||
return content
|
||||
|
||||
return super(SkypeMessagesParser, self).get_message_text()
|
||||
|
||||
def get_thread_id(self):
|
||||
group_ids = self.result_set.getString("participant_ids")
|
||||
if group_ids is not None:
|
||||
return self.result_set.getString("conversation_id")
|
||||
return super(SkypeMessagesParser, self).get_thread_id()
|
||||
|
||||
|
||||
def get_file_attachment(self):
|
||||
if (self.result_set.getString("device_gallery_path") is None):
|
||||
return None
|
||||
else:
|
||||
return self.result_set.getString("device_gallery_path")
|
||||
|
||||
Reference in New Issue
Block a user