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-- Catch applications running from unusual directories, such as /tmp
--
-- references:
-- * https://attack.mitre.org/techniques/T1074/
--
-- false positives:
-- * software installers and updaters
-- * developers running programs out of /tmp
--
-- interval: 240
-- platform: darwin
-- tags: filesystem events
SELECT
REGEX_MATCH (REPLACE(pe.path, u.directory, '~'), '(.*)/', 1) AS dir,
REGEX_MATCH (
REPLACE(pe.path, u.directory, '~'),
'(~*/.*?)/',
1
) AS top1_dir,
REGEX_MATCH (
REPLACE(pe.path, u.directory, '~'),
'(~*/.*?/.*?/.*?)/',
1
) AS top3_dir,
-- Child
pe.path AS p0_path,
REGEX_MATCH (pe.path, '.*/(.*)', 1) AS p0_name,
TRIM(pe.cmdline) AS p0_cmd,
-- pe.cwd is NULL on macOS
p.cwd AS p0_cwd,
pe.pid AS p0_pid,
pe.euid AS p0_euid,
-- Parent
pe.parent AS p1_pid,
TRIM(COALESCE(p1.cmdline, pe1.cmdline)) AS p1_cmd,
p1.cwd AS p1_cwd,
COALESCE(p1.path, pe1.path) AS p1_path,
COALESCE(p_hash1.sha256, pe_hash1.sha256) AS p1_hash,
REGEX_MATCH (COALESCE(p1.path, pe1.path), '.*/(.*)', 1) AS p1_name,
-- Grandparent
COALESCE(p1.parent, pe1.parent) AS p2_pid,
TRIM(
COALESCE(p1_p2.cmdline, pe1_p2.cmdline, pe1_pe2.cmdline)
) AS p2_cmd,
p1_p2.cwd AS p2_cwd,
COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path) AS p2_path,
COALESCE(
p1_p2_hash.path,
pe1_p2_hash.path,
pe1_pe2_hash.path
) AS p2_hash,
REGEX_MATCH (
COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path),
'.*/(.*)',
1
) AS p2_name
FROM
process_events pe
LEFT JOIN file f ON pe.path = f.path
LEFT JOIN signature S ON pe.path = s.path
LEFT JOIN users u ON pe.uid = u.uid
LEFT JOIN processes p ON pe.pid = p.pid -- Parents (via two paths)
LEFT JOIN processes p1 ON pe.parent = p1.pid
LEFT JOIN hash p_hash1 ON p1.path = p_hash1.path
LEFT JOIN process_events pe1 ON pe.parent = pe1.pid
AND pe1.cmdline != ''
LEFT JOIN hash pe_hash1 ON pe1.path = pe_hash1.path -- Grandparents (via 3 paths)
LEFT JOIN processes p1_p2 ON p1.parent = p1_p2.pid -- Current grandparent via parent processes
LEFT JOIN processes pe1_p2 ON pe1.parent = pe1_p2.pid -- Current grandparent via parent events
LEFT JOIN process_events pe1_pe2 ON pe1.parent = pe1_p2.pid
AND pe1_pe2.cmdline != '' -- Past grandparent via parent events
LEFT JOIN hash p1_p2_hash ON p1_p2.path = p1_p2_hash.path
LEFT JOIN hash pe1_p2_hash ON pe1_p2.path = pe1_p2_hash.path
LEFT JOIN hash pe1_pe2_hash ON pe1_pe2.path = pe1_pe2_hash.path
WHERE
pe.time > (strftime('%s', 'now') -240)
AND pe.status = 0
AND pe.cmdline != ''
AND pe.cmdline IS NOT NULL
AND top1_dir NOT IN (
'~/Applications',
'/Applications',
'~/Applications (Parallels)',
'~/bin',
'~/.cargo',
'~/chainguard',
'~/dev',
'~/code',
'~/Code',
'~/.config',
'~/.gimme',
'~/git',
'~/github',
'~/go',
'~/google-cloud-sdk',
'~/.gradle',
'~/homebrew',
'~/.kuberlr',
-- '~/Library',
'~/.local',
'/nix',
'~/Parallels',
'~/proj',
'~/projects',
'~/Projects',
'~/.provisio',
'~/.pulumi',
'~/.pyenv',
'~/.rustup',
'~/src',
'~/.steampipe',
'/System',
'~/.tflint.d',
'~/.vscode',
'~/.vs-kubernetes'
)
AND top3_dir NOT IN (
'/Library/Apple/System',
'/Library/Application Support/Adobe',
'~/Library/Application Support/BraveSoftware',
'~/Library/Application Support/com.elgato.StreamDeck',
'/Library/Application Support/EcammLive',
'/Library/Application Support/GPGTools',
'~/Library/Application Support/JetBrains',
'~/Library/Caches/com.knollsoft.Rectangle',
'~/Library/Caches/com.mimestream.Mimestream',
'~/Library/Caches/snyk',
'/Library/Developer/CommandLineTools',
'~/Library/Developer/Xcode',
'/Library/Google/GoogleSoftwareUpdate',
'~/Library/Google/GoogleSoftwareUpdate',
'/Library/Plug-Ins/FxPlug',
'/opt/homebrew/Caskroom',
'/opt/homebrew/Cellar',
'/opt/homebrew/Library',
'/usr/libexec/AssetCache',
'/usr/libexec/rosetta',
'/usr/local/Cellar',
'/usr/local/kolide-k2',
'/Volumes/Slack/Slack.app'
)
AND dir NOT IN (
'/bin',
'~/bin',
'~/code/bin',
'~/Downloads/google-cloud-sdk/bin',
'~/Downloads/protoc/bin',
'/Library/Audio/Plug-Ins/HAL/ACE.driver/Contents/Resources/aceagent.app/Contents/MacOS',
'~/go/bin',
'~/Library/Application Support/cloud-code/installer/google-cloud-sdk/bin',
'~/Library/Application Support/dev.warp.Warp-Stable',
'/Library/Application Support/Logitech.localized/LogiOptionsPlus/logioptionsplus_agent.app/Contents/MacOS',
'/Library/Application Support/Logitech.localized/Logitech Options.localized/LogiMgrUpdater.app/Contents/Resources',
'/Library/DropboxHelperTools/Dropbox_u501',
'/Library/Filesystems/kbfuse.fs/Contents/Resources',
'/Library/Frameworks/Python.framework/Versions/3.10/bin',
'/Library/Google/GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/Contents/Helpers.app/Contents/MacOS',
'/Library/Google/GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/Contents/Helpers/GoogleSoftwareUpdateAgent.app/Contents/MacOS',
'/Library/Printers/DYMO/Utilities',
'/Library/PrivilegedHelperTools',
'/Library/TeX/texbin',
'~/.local/bin',
'~/.magefile',
'/node_modules/.bin',
'/opt/usr/bin',
'/opt/X11/bin',
'/opt/X11/libexec',
'~/projects/go/bin',
'/run/current-system/sw/bin',
'/sbin',
'/usr/bin',
'/usr/lib',
'/opt/homebrew/bin',
'/usr/lib/bluetooth',
'/usr/lib/cups/notifier',
'/usr/libexec',
'/usr/libexec/ApplicationFirewall',
'/usr/libexec/AssetCache',
'/usr/libexec/firmwarecheckers',
'/usr/libexec/firmwarecheckers/eficheck',
'/usr/libexec/rosetta',
'/usr/lib/fwupd',
'/usr/lib/ibus',
'/usr/lib/system',
'/usr/local/bin',
'/usr/sbin'
) -- Locally built executables
AND NOT (
s.identifier = 'a.out'
AND dir LIKE '~/%'
AND p1_name IN ('fish', 'sh', 'bash', 'zsh', 'terraform', 'code')
)
AND NOT (
s.authority = ''
AND dir LIKE '~/%'
AND p1_name IN ('fish', 'sh', 'bash', 'zsh')
AND p.cmdline LIKE './%'
)
-- Spotify
AND pe.path NOT LIKE '/private/var/folders/%/T/sp_relauncher'
-- Sparkle updater
AND pe.path NOT LIKE '/Users/%/Library/Caches/%/org.sparkle-project.Sparkle/Launcher/%/Updater.app/Contents/MacOS/Updater'
AND dir NOT LIKE '/Applications/%'
AND dir NOT LIKE '~/%/bin'
AND dir NOT LIKE '~/%/google-cloud-sdk/bin/%'
AND dir NOT LIKE '~/Library/Caches/ms-playwright/%'
AND dir NOT LIKE '~/Library/Printers/%/Contents/MacOS'
AND dir NOT LIKE '~/.local/%/packages/%'
AND dir NOT LIKE '~/%/node_modules/.pnpm/%'
AND dir NOT LIKE '/private/tmp/%.app/Contents/MacOS'
AND dir NOT LIKE '/private/tmp/go-build%/exe'
AND dir NOT LIKE '/private/tmp/KSInstallAction.%/Install Google Software Update.app/Contents/Helpers'
AND dir NOT LIKE '/private/tmp/nix-build-%'
AND dir NOT LIKE '/private/tmp/PKInstallSandbox.%/Scripts/com.microsoft.OneDrive.%'
AND dir NOT LIKE '/private/var/db/com.apple.xpc.roleaccountd.staging/%.xpc/Contents/MacOS'
AND dir NOT LIKE '/private/var/folders/%/d/Wrapper/%.app/%'
AND dir NOT LIKE '/private/var/folders/%/bin'
AND dir NOT LIKE '/private/var/folders/%/Contents/%'
AND dir NOT LIKE '/private/var/folders/%/go-build%'
AND dir NOT LIKE '/private/var/folders/%/GoLand'
AND dir NOT LIKE '~/%repo%'
AND dir NOT LIKE '~/%sigstore%'
AND dir NOT LIKE '%/.terraform/providers/%'
AND dir NOT LIKE '/Volumes/com.getdropbox.dropbox-%' -- These signers can run from wherever the hell they want.
AND s.authority NOT IN (
'Apple iPhone OS Application Signing',
'Apple Mac OS Application Signing',
'Developer ID Application: Adobe Inc. (JQ525L2MZD)',
'Developer ID Application: Cisco (DE8Y96K9QP)',
'Developer ID Application: CodeWeavers Inc. (9C6B7X7Z8E)',
'Developer ID Application: Sublime HQ Pty Ltd (Z6D26JE4Y4)',
'Developer ID Application: Corsair Memory, Inc. (Y93VXCB8Q5)',
'Developer ID Application: Docker Inc (9BNSXJN65R)',
'Developer ID Application: Dropbox, Inc. (G7HH3F8CAK)',
'Developer ID Application: Figma, Inc. (T8RA8NE3B7)',
'Developer ID Application: GEORGE NACHMAN (H7V7XYVQ7D)',
'Developer ID Application: Google LLC (EQHXZ8M8AV)',
'Developer ID Application: Hashicorp, Inc. (D38WU7D763)',
'Developer ID Application: Logitech Inc. (QED4VVPZWA)',
'Developer ID Application: Microsoft Corporation (UBF8T346G9)',
'Developer ID Application: Ned Deily (DJ3H93M7VJ)',
-- ^-- Python
'Developer ID Application: Node.js Foundation (HX7739G8FX)',
'Developer ID Application: Objective Development Software GmbH (MLZF7K7B5R)',
'Developer ID Application: Objective-See, LLC (VBG97UB4TA)',
'Developer ID Application: Opal Camera Inc (97Z3HJWCRT)',
'Developer ID Application: Oracle America, Inc. (VB5E2TV963)',
'Developer ID Application: TablePlus Inc (3X57WP8E8V)',
'Developer ID Application: Tenable, Inc. (4B8J598M7U)',
'Developer ID Application: Valve Corporation (MXGJJ98X76)',
'Developer ID Application: Wireshark Foundation, Inc. (7Z6EMTD2C6)',
'Software Signing'
) -- Don't spam alerts with repeated invocations of the same command-line
GROUP BY
p.cmdline,
p.cwd,
p.euid;
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