OS X Auditor | Tool For Mac OS X Computer Forensics

NoBody · May 9, 2020, 1:14pm

OS X Auditor is a tool for forensic Mac OS X computer, this tool can analyze kernel, user, application, third party, malware and more on Mac OS computer. If you want to investigate your Mac you have to try this tool.

Introduction

OS X Auditor is a free Mac OS X computer forensics tool.

OS X Auditor parses and hashes the following artifacts on the running system or a copy of a system you want to analyze :

the kernel extensions
the system agents and daemons
the third party’s agents and daemons
the old and deprecated system and third party’s startup items
the users’ agents
the users’ downloaded files
the installed applications

It extracts :

the users’ quarantined files
the users’ Safari history, downloads, topsites, LastSession, HTML5 databases and localstore
the users’ Firefox cookies, downloads, formhistory, permissions, places and signons
the users’ Chrome history and archives history, cookies, login data, top sites, web data, HTML5 databases and local storage
the users’ social and email accounts
the WiFi access points the audited system has been connected to (and tries to geolocate them)

It also looks for suspicious keywords in the .plist themselves.

It can verify the reputation of each file on :

Team Cymru’s MHR
VirusTotal
your own local database

It can aggregate all logs from the following directories into a zipball :

/var/log (-> /private/var/log)
/Library/logs
the user’s ~/Library/logs

Finally, the results can be :

rendered as a simple txt log file (so you can cat-pipe-grep in them… or just grep)
rendered as a HTML log file
sent to a Syslog server

Author

Jean-Philippe Teissier – @Jipe_ & al.

Development status

OS X Auditor IS NO LONGER MAINTAINED – YOU SHOULD NOT USE IT

Support

OS X Auditor started as a week-end project and is no longer maintained. It has been forked by the great guys @ Yelp who created osxcollector.

I do recommend you to use to osxcollector (https://github.com/Yelp/osxcollector)

How to install

Just copy all files from GitHub.

§ git clone https://github.com/jipegit/OSXAuditor

Dependencies

If you plan to run OS X Auditor on a Mac, you will get a full plist parsing support with the OS X Foundation through pyobjc :

§ pip install pyobjc

If you can’t install pyobjc or if you plan to run OS X Auditor on another OS than Mac OS X, you may experience some troubles with the plist parsing :

§  pip install biplist

§  pip install plist

These dependencies will be removed when a working native plist module will be available in python.

How to run

OS X Auditor runs well with python >= 2.7.2 (2.7.9 is OK). It does not run with a different version of python yet (due to the plist nightmare)
OS X Auditor is maintained to work on the lastest OS X version. It will do its best on older OS X versions.
You must run it as root (or via sudo) if you want to use is on a running system, otherwise it won’t be able to access some system and other users’ files
If you’re using API keys from environment variables (see below), you need to use the sudo -E to use the users environment variables

Type osxauditor.py -h to get all the available options, then run it with the selected options eg. [sudo -E] python osxauditor.py -a -m -l localhashes.db -H log.html

Setting Environment Variables

VirusTotal API :

export VT_API_KEY=aaaabbbbccccddddeeee

Changelog

0.4.3

FIX:(lots of) Bug fixes – See https://github.com/jipegit/OSXAuditor/issues
CHANGE: Malware.lu hash check removed – service not available anymore

0.4.2

CHANGE: Moved API keys from in the code to environment variables

0.4.1

CHANGE: Search for generic backdoors in LaunchAgentPlist

0.4

NEW: extracts events (boot/shutdown, hibernation in/out, sudo commands, usb devices, ttys opened/closed, from the system logs and create a (not readable yet) timeline (-e/eventlogs)
NEW: extracts users’ LoginItems
NEW: extracts users’ RecentItems
NEW: extracts the LastSession from Safari artifacts
NEW: extract system groups and users details
FIX: wrong os.path.join() calls
FIX: bug in the recursive ParsePackagesDir()

0.3.1

NEW: provides with the system name, version and build of the audited system
NEW: ability to analyze installed Applications (-i/–installedapps)
NEW: extracts the Archived History from Google Chrome artifacts
NEW: a human readable HTML log report
FIX: HTMLLog() and SYSLOGLog() now handle exceptions
FIX: ParsePackagesDir() is now recursive and only tries to parse apps or kernel extensions. Some DEBUG output added as well
FIX: HUGE UTF-8/UNICODE improvement
FIX: .DS_Store and .localized files are ignored in ParsePackagesDir()

0.3

NEW: ability to parse Google Chrome artifacts (History and archives history, Cookies, Login Data, Top Sites, Web Data, HTML5 databases and local storage) with -b/–browsers
NEW: ability to extract the Wi-Fi APs the audited system has been connected to from the Airport Preferences and tries to geolocate them using Geomena (-A/–airportprefs). You must use -g/–wifiapgeolocate to enable the geolocation (or set GEOLOCATE_WIFI_AP to True in the code).
NEW: ability to extract users’ social and email accounts (-U/–usersaccounts)
FIX: ability to handle the locked sqlite databases especially while auditing a live system
FIX: hashes duplicates removed
FIX: better identify md5 in the HTML output
CHANGE: indicates if a section (Startup items, Packages directory, Db tables, etc…) is empty to clarify the output
CHANGE: the downloads artifacts (-d/–downloads) include the old and new Mail.app default download directories

0.2.1

CHANGE/FIX: implement a BigFileMd5() function to hash very big files, avoid MemoryError execptions and reduce the memory footprint
FIX: UTF-8 entries from LSQuarantineEvent in ParseQuarantines()

0.2

NEW: ability to send the results to a remote syslogd server (-S)
NEW: ability to create a zipball of all the log files found on the audited system (-z)
CHANGE: the analysis of startup artifacts includes the old and deprecated StartupItems
CHANGE: the analysis of startup artifacts includes the ScriptingAdditions
CHANGE: the analysis of quarantined artifact includes the old QuarantineEvents for Mac OS X systems <= 10.6
CHANGE: great improvement of plist hangling using the Python ⟷ Objective-C bridge (PyObjC) and OS X Foundation
CHANGE: some changes in the options parameters (-t, -l)
CHANGE: license changed from CC to GPL
CHANGE: debug levels are now more consitent in the output logs
CHANGE: a small change with the Bootstrap CSS
CHANGE: the VirusTotal lookup is now done in a bulk mode
FIX: a bug in ParseLaunchAgents() on plist files containing both Program and ProgramArguments keys

0.1

Initial Release

Design & Capabilities

Artifacts

Users

Library/Preferences/com.apple.LaunchServices.QuarantineEventsV2
Library/Preferences/com.apple.LaunchServices.QuarantineEvents
Library/Preferences/com.apple.loginitems.plist
Library/Mail Downloads/
Library/Containers/com.apple.mail/Data/Library/Mail Downloads
Library/Accounts/Accounts3.sqlite
Library/Containers/com.apple.mail/Data/Library/Mail/V2/MailData/Accounts.plist
Library/Preferences/com.apple.recentitems.plist

Firefox

Library/Application Support/Firefox/Profiles/
cookies.sqlite
downloads.sqlite
formhistory.sqlite
places.sqlite
signons.sqlite
permissions.sqlite
addons.sqlite
extensions.sqlite
content-prefs.sqlite
healthreport.sqlite
webappsstore.sqlite

Safari

Library/Safari/
Downloads.plist
History.plist
TopSites.plist
LastSession.plist
Databases
LocalStorage

Chrome

Library/Application Support/Google/Chrome/Default/
History
Archived History
Cookies
Login Data
Top Sites
Web Data
databases
Local Storage

System

/System/Library/LaunchAgents/
/System/Library/LaunchDaemons/
/System/Library/ScriptingAdditions/
/System/Library/StartupItems/Library/ScriptingAdditions/
/System/Library/Extensions/
/System/Library/CoreServices/SystemVersion.plist
/Library/LaunchAgents/
/Library/LaunchDaemons/
/Library/StartupItems/
/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
/Library/logs
/var/log
/etc/localtime
StartupParameters.plist
/private/var/db/dslocal/nodes/Default/groups/admin.plist
/private/var/db/dslocal/nodes/Default/users

TODO

extract user info from /private/var/db/dslocal/nodes/Default/users

Related work

Disk Arbitrator

Disk Arbitrator is Mac OS X forensic utility designed to help the user ensure correct forensic procedures are followed during imaging of a disk device. Disk Arbitrator is essentially a user interface to the Disk Arbitration framework, which enables a program to participate in the management of block storage devices, including the automatic mounting of file systems. When enabled, Disk Arbitrator will block the mounting of file systems to avoid mounting as read-write and violating the integrity of the evidence.

Volafox

volafox a.k.a ‘Mac OS X Memory Analysis Toolkit’ is developed on python 2.x

https://code.google.com/p/volafox/

Mandiant Memoryze™ for the Mac

Memoryze for the Mac is free memory forensic software that helps incident responders find evil in memory… on Macs. Memoryze for the Mac can acquire and/or analyze memory images. Analysis can be performed on offline memory images or on live systems.

http://www.mandiant.com/resources/download/mac-memoryze

Volatility MacMemoryForensics

https://code.google.com/p/volatility/wiki/MacMemoryForensics

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Bootstrap and JQuery have their own GPL compatible licences.

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