osquery-defense-kit/detection/evasion/unexpected-library-entries-...

146 lines
4.1 KiB
SQL

-- Find unexpected files in /Library
--
-- references:
-- * https://www.intezer.com/blog/incident-response/new-backdoor-sysjoker/
--
-- false positives:
-- * programs which create new Library directories
--
-- tags: persistent state filesystem seldom
-- platform: darwin
SELECT
file.path,
file.type,
file.size,
file.mtime,
file.uid,
file.ctime,
file.gid,
hash.sha256,
magic.data
FROM
file
LEFT JOIN hash ON file.path = hash.path
LEFT JOIN magic ON file.path = magic.path
WHERE
(
file.path LIKE '/Library/%'
OR file.path LIKE '/Library/.%'
OR file.path LIKE '/Library/%/.%'
OR file.path LIKE '/Library/WebServer/%'
OR file.path LIKE '/Library/WebServer/Documents/%%'
OR file.path LIKE '/Library/WebServer/CGI-Executables/%%'
)
AND file.path NOT LIKE '%/../%'
AND file.path NOT LIKE '%/./%'
AND file.size > 1
AND file.path NOT IN (
'/Library/Apple/',
'/Library/Application Support/',
'/Library/Audio/',
'/Library/AutoBugCapture/',
'/Library/Automator/',
'/Library/Bluetooth/',
'/Library/Caches/',
'/Library/Catacomb/',
'/Library/ColorPickers/',
'/Library/ColorSync/',
'/Library/Components/',
'/Library/Compositions/',
'/Library/Compositions/.localized',
'/Library/Contextual Menu Items/',
'/Library/CoreAnalytics/',
'/Library/CoreMediaIO/',
'/Library/Desktop Pictures/',
'/Library/Desktop Pictures/.localizations/',
'/Library/Desktop Pictures/.thumbnails/',
'/Library/Developer/',
'/Library/DirectoryServices/',
'/Library/Documentation/',
'/Library/DriverExtensions/',
'/Library/DropboxHelperTools/',
'/Library/Extensions/',
'/Library/Filesystems/',
'/Library/Fonts/',
'/Library/Fonts/.uuid',
'/Library/Frameworks/',
'/Library/Google/',
'/Library/GPUBundles/',
'/Library/Graphics/',
'/Library/Image Capture/',
'/Library/Input Methods/',
'/Library/InstallerSandboxes/',
'/Library/InstallerSandboxes/.metadata_never_index',
'/Library/InstallerSandboxes/.PKInstallSandboxManager/',
'/Library/Internet Plug-Ins/',
'/Library/Java/',
'/Library/KernelCollections/',
'/Library/KernelCollections/.file',
'/Library/Keyboard Layouts/',
'/Library/Keychains/',
'/Library/LaunchAgents/',
'/Library/LaunchDaemons/',
'/Library/.localized',
'/Library/Logs/',
'/Library/Mail/',
'/Library/Managed Preferences/',
'/Library/Microsoft/',
'/Library/Modem Scripts/',
'/Library/Nessus/',
'/Library/Objective-See/',
'/Library/OpenDirectory/',
'/Library/OSAnalytics/',
'/Library/OSAnalytics/.DS_Store',
'/Library/Parallels/',
'/Library/PDF Services/',
'/Library/Perl/',
'/Library/ThunderboltAccessoryFirmwareUpdates/',
'/Library/Plug-Ins/',
'/Library/PreferencePanes/',
'/Library/Preferences/',
'/Library/Preferences/.GlobalPreferences.plist',
'/Library/Printers/',
'/Library/PrivilegedHelperTools/',
'/Library/Python/',
'/Library/QuickLook/',
'/Library/Receipts/',
'/Library/Ruby/',
'/Library/Sandbox/',
'/Library/Screen Savers/',
'/Library/ScriptingAdditions/',
'/Library/Scripts/',
'/Library/Security/',
'/Library/Services/',
'/Library/Speech/',
'/Library/Spotlight/',
'/Library/StagedDriverExtensions/',
'/Library/StagedExtensions/',
'/Library/StartupItems/',
'/Library/SystemExtensions/',
'/Library/SystemExtensions/.staging/',
'/Library/SystemMigration/',
'/Library/SystemProfiler/',
'/Library/Tailscale/',
'/Library/TeX/',
'/Library/Updates/',
'/Library/User Pictures/',
'/Library/User Template/',
'/Library/Video/',
'/Library/WebServer/',
'/Library/WebServer/CGI-Executables/',
'/Library/WebServer/Documents/',
'/Library/WebServer/Documents/index.html.en',
'/Library/WebServer/share/'
)
-- Probably Adobe copy protection, my guess is the host serial number or MAC addr.
AND NOT REGEX_MATCH (
file.path,
'^/Library/Caches/\.([0-9ABCDEF]{12})$',
1
) != ""
AND NOT (
file.path = '/Library/Caches/.DS_Store'
AND magic.data = 'Apple Desktop Services Store'
AND file.size < 9000
)