mirror of
https://github.com/chainguard-dev/osquery-defense-kit
synced 2025-04-10 03:01:18 +00:00
257 lines
9.1 KiB
SQL
257 lines
9.1 KiB
SQL
-- Catch applications running from unusual directories, such as /tmp
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--
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-- references:
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-- * https://attack.mitre.org/techniques/T1074/
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--
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-- false positives:
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-- * software installers and updaters
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-- * developers running programs out of /tmp
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--
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-- interval: 240
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-- platform: darwin
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-- tags: filesystem events
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SELECT
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-- Child
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pe.path AS p0_path,
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REGEX_MATCH (pe.path, '.*/(.*)', 1) AS p0_name,
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REGEX_MATCH (p.path, '(.*)/', 1) AS dir,
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REGEX_MATCH (p.path, '(/.*?/.*?/.*?)/', 1) AS top_dir, -- 3 levels deep
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REPLACE(f.directory, u.directory, '~') AS homedir,
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REGEX_MATCH (
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REPLACE(f.directory, u.directory, '~'),
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'(~/.*?/.*?/.*?/)',
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1
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) AS top3_homedir,
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REGEX_MATCH (
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REPLACE(f.directory, u.directory, '~'),
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'(~/.*?/)',
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1
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) AS top_homedir, -- 1 level deep
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TRIM(pe.cmdline) AS p0_cmd,
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pe.cwd AS p0_cwd,
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pe.pid AS p0_pid,
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pe.euid AS p0_euid,
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-- Parent
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pe.parent AS p1_pid,
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TRIM(COALESCE(p1.cmdline, pe1.cmdline)) AS p1_cmd,
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COALESCE(p1.path, pe1.path) AS p1_path,
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COALESCE(p_hash1.sha256, pe_hash1.sha256) AS p1_hash,
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REGEX_MATCH (COALESCE(p1.path, pe1.path), '.*/(.*)', 1) AS p1_name,
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-- Grandparent
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COALESCE(p1.parent, pe1.parent) AS p2_pid,
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TRIM(
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COALESCE(p1_p2.cmdline, pe1_p2.cmdline, pe1_pe2.cmdline)
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) AS p2_cmd,
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COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path) AS p2_path,
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COALESCE(
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p1_p2_hash.path,
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pe1_p2_hash.path,
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pe1_pe2_hash.path
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) AS p2_hash,
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REGEX_MATCH (
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COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path),
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'.*/(.*)',
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1
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) AS p2_name
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FROM
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process_events pe
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LEFT JOIN file f ON pe.path = f.path
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LEFT JOIN signature S ON pe.path = s.path
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LEFT JOIN users u ON pe.euid = u.uid
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LEFT JOIN processes p ON pe.pid = p.pid
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-- Parents (via two paths)
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LEFT JOIN processes p1 ON pe.parent = p1.pid
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LEFT JOIN hash p_hash1 ON p1.path = p_hash1.path
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LEFT JOIN process_events pe1 ON pe.parent = pe1.pid
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AND pe1.cmdline != ''
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LEFT JOIN hash pe_hash1 ON pe1.path = pe_hash1.path
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-- Grandparents (via 3 paths)
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LEFT JOIN processes p1_p2 ON p1.parent = p1_p2.pid -- Current grandparent via parent processes
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LEFT JOIN processes pe1_p2 ON pe1.parent = pe1_p2.pid -- Current grandparent via parent events
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LEFT JOIN process_events pe1_pe2 ON pe1.parent = pe1_p2.pid
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AND pe1_pe2.cmdline != '' -- Past grandparent via parent events
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LEFT JOIN hash p1_p2_hash ON p1_p2.path = p1_p2_hash.path
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LEFT JOIN hash pe1_p2_hash ON pe1_p2.path = pe1_p2_hash.path
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LEFT JOIN hash pe1_pe2_hash ON pe1_pe2.path = pe1_pe2_hash.path
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WHERE
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pe.time > (strftime('%s', 'now') -240)
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-- The process_events table on macOS ends up with relative directories for some reason?
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AND dir LIKE '/%'
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AND f.size > 0
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AND dir NOT IN (
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'/bin',
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'/Library/Application Support/Logitech.localized/Logitech Options.localized/LogiMgrUpdater.app/Contents/Resources',
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'/Library/DropboxHelperTools/Dropbox_u501',
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'/Library/Filesystems/kbfuse.fs/Contents/Resources',
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'/Library/Frameworks/Python.framework/Versions/3.10/bin',
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'/Library/Google/GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/Contents/Helpers.app/Contents/MacOS',
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'/Library/Google/GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/Contents/Helpers/GoogleSoftwareUpdateAgent.app/Contents/MacOS',
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'/Library/Printers/DYMO/Utilities',
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'/Library/PrivilegedHelperTools',
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'/Library/TeX/texbin',
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'/nix/store',
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'/nix/var/nix/profiles/default/bin',
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'/node_modules/.bin',
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'/opt/homebrew/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/bin/gke-gcloud-auth-plugin',
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'/opt/usr/bin',
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'/opt/X11/bin',
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'/opt/X11/libexec',
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'/run/current-system/sw/bin',
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'/sbin',
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'/usr/bin',
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'/usr/lib',
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'/usr/lib/bluetooth',
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'/usr/lib/cups/notifier',
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'/usr/libexec',
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'/usr/libexec/ApplicationFirewall',
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'/usr/libexec/AssetCache',
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'/usr/libexec/firmwarecheckers',
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'/usr/libexec/firmwarecheckers/eficheck',
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'/usr/libexec/rosetta',
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'/usr/lib/fwupd',
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'/usr/lib/ibus',
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'/usr/lib/system',
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'/usr/local/bin',
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'/usr/sbin'
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)
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AND top_dir NOT IN (
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'/Applications/Firefox.app/Contents',
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'/Applications/Google Chrome.app/Contents',
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'/Library/Apple/System',
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'/Library/Application Support/Adobe',
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'/Library/Application Support/GPGTools',
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'/Library/Google/GoogleSoftwareUpdate',
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'/System/Applications/Mail.app',
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'/System/Applications/Music.app',
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'/System/Applications/News.app',
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'/System/Applications/TV.app',
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'/System/Applications/Weather.app',
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'/System/Library/CoreServices',
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'/System/Library/Filesystems',
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'/System/Library/Frameworks',
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'/System/Library/PrivateFrameworks',
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'/System/Library/SystemConfiguration',
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'/System/Library/SystemProfiler',
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'/System/Volumes/Preboot',
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'/usr/local/kolide-k2'
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)
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AND homedir NOT IN (
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'~/bin',
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'~/code/bin',
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'~/Downloads/google-cloud-sdk/bin',
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'~/Library/Application Support/dev.warp.Warp-Stable',
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'~/go/bin',
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'~/Library/Application Support/cloud-code/installer/google-cloud-sdk/bin',
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'~/.local/bin',
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'~/.magefile',
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'~/Downloads/protoc/bin',
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'~/projects/go/bin'
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)
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AND top3_homedir NOT IN (
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'~/Library/Application Support/com.elgato.StreamDeck/',
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'~/Library/Caches/snyk/',
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'~/Library/Caches/com.mimestream.Mimestream/',
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'~/Library/Application Support/JetBrains/',
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'~/Library/Application Support/BraveSoftware/'
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)
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AND top_homedir NOT IN (
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'~/Applications/',
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'~/Applications (Parallels)/',
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'~/bin/',
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'~/.cargo/',
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'~/chainguard/',
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'~/code/',
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'~/Code/',
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'~/.config/',
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'~/git/',
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'~/github/',
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'~/go/',
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'~/google-cloud-sdk/',
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'~/homebrew/',
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'~/.kuberlr/',
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-- '~/Library/',
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'~/.gradle/',
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'~/.local/',
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'~/Parallels/',
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'~/proj/',
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'~/projects/',
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'~/Projects/',
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'~/.pulumi/',
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'~/.provisio/',
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'~/.pyenv/',
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'~/.rustup/',
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'~/src/',
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'~/.tflint.d/',
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'~/.vscode/',
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'~/.vs-kubernetes/'
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)
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-- Locally built executables
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AND NOT (
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s.identifier = 'a.out'
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AND homedir LIKE '~/%'
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AND p1_name IN ('fish', 'sh', 'bash', 'zsh', 'terraform', 'code')
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)
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AND NOT (
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s.authority = ''
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AND homedir LIKE '~/%'
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AND p1_name IN ('fish', 'sh', 'bash', 'zsh')
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AND p.cmdline LIKE './%'
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)
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AND dir NOT LIKE '../%' -- data issue
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AND dir NOT LIKE '/Applications/%'
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AND dir NOT LIKE '/private/tmp/%.app/Contents/MacOS'
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AND dir NOT LIKE '/private/tmp/go-build%/exe'
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AND dir NOT LIKE '/private/tmp/KSInstallAction.%/Install Google Software Update.app/Contents/Helpers'
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AND dir NOT LIKE '/private/tmp/nix-build-%'
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AND dir NOT LIKE '/private/tmp/PKInstallSandbox.%/Scripts/com.microsoft.OneDrive.%'
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AND dir NOT LIKE '/private/var/db/com.apple.xpc.roleaccountd.staging/%.xpc/Contents/MacOS'
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AND dir NOT LIKE '/private/var/folders/%/bin'
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AND dir NOT LIKE '/private/var/folders/%/Contents/%'
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AND dir NOT LIKE '/private/var/folders/%/d/Wrapper/%.app'
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AND dir NOT LIKE '/private/var/folders/%/go-build%'
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AND dir NOT LIKE '/private/var/folders/%/GoLand'
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AND dir NOT LIKE '%/.terraform/providers/%'
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AND dir NOT LIKE '/Volumes/com.getdropbox.dropbox-%'
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AND homedir NOT LIKE '~/%/google-cloud-sdk/bin/%'
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AND homedir NOT LIKE '~/Library/Caches/ms-playwright/%'
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AND homedir NOT LIKE '~/%/node_modules/.pnpm/%'
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AND homedir NOT LIKE '~/%repo%'
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AND homedir NOT LIKE '~/.local/%/packages/%'
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AND homedir NOT LIKE '~/%sigstore%'
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AND homedir NOT LIKE '~/%/bin'
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AND homedir NOT LIKE '~/Library/Printers/%/Contents/MacOS'
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-- These signers can run from wherever the hell they want.
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AND s.authority NOT IN (
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'Apple iPhone OS Application Signing',
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'Apple Mac OS Application Signing',
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'Developer ID Application: Adobe Inc. (JQ525L2MZD)',
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'Developer ID Application: Cisco (DE8Y96K9QP)',
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'Developer ID Application: CodeWeavers Inc. (9C6B7X7Z8E)',
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'Developer ID Application: Sublime HQ Pty Ltd (Z6D26JE4Y4)',
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'Developer ID Application: Corsair Memory, Inc. (Y93VXCB8Q5)',
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'Developer ID Application: Docker Inc (9BNSXJN65R)',
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'Developer ID Application: Dropbox, Inc. (G7HH3F8CAK)',
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'Developer ID Application: Figma, Inc. (T8RA8NE3B7)',
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'Developer ID Application: GEORGE NACHMAN (H7V7XYVQ7D)',
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'Developer ID Application: Google LLC (EQHXZ8M8AV)',
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'Developer ID Application: Hashicorp, Inc. (D38WU7D763)',
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'Developer ID Application: Logitech Inc. (QED4VVPZWA)',
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'Developer ID Application: Microsoft Corporation (UBF8T346G9)',
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'Developer ID Application: Ned Deily (DJ3H93M7VJ)', -- Python
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'Developer ID Application: Node.js Foundation (HX7739G8FX)',
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'Developer ID Application: Objective Development Software GmbH (MLZF7K7B5R)',
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'Developer ID Application: Objective-See, LLC (VBG97UB4TA)',
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'Developer ID Application: Opal Camera Inc (97Z3HJWCRT)',
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'Developer ID Application: Oracle America, Inc. (VB5E2TV963)',
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'Developer ID Application: TablePlus Inc (3X57WP8E8V)',
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'Developer ID Application: Tenable, Inc. (4B8J598M7U)',
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'Developer ID Application: Valve Corporation (MXGJJ98X76)',
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'Developer ID Application: Wireshark Foundation, Inc. (7Z6EMTD2C6)',
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'Software Signing'
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)
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-- Don't spam alerts with repeated invocations of the same command-line
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GROUP BY
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p.cmdline,
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p.cwd,
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p.euid;
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