osquery-defense-kit/net/unexpected-talkers-macos.sql

SELECT s.family,
  protocol,
  s.local_port,
  s.remote_port,
  s.local_address,
  s.remote_address,
  p.name,
  p.path,
  p.cmdline AS child_cmd,
  p.cwd,
  s.pid,
  s.net_namespace,
  p.parent AS parent_pid,
  pp.name AS parent_name,
  pp.path AS parent_path,
  pp.cmdline AS parent_cmd,
  hash.sha256,
  CONCAT(
    MIN(s.remote_port, 32768),
    ",",
    protocol,
    ",",
    MIN(p.uid, 500),
    ",",
    p.name,
    ',',
    signature.identifier,
    ',',
    signature.authority
  ) AS exception_key
FROM process_open_sockets s
  LEFT JOIN processes p ON s.pid = p.pid
  LEFT JOIN processes pp ON pp.pid = p.parent
  LEFT JOIN hash ON p.path = hash.path
  LEFT JOIN signature ON p.path = signature.path
WHERE protocol > 0
  AND s.remote_port > 0
  AND s.remote_address NOT IN ('127.0.0.1', '::ffff:127.0.0.1', '::1')
  AND s.remote_address NOT LIKE 'fe80:%'
  AND s.remote_address NOT LIKE '127.%'
  AND s.remote_address NOT LIKE '192.168.%'
  AND s.remote_address NOT LIKE '172.1%'
  AND s.remote_address NOT LIKE '172.2%'
  AND s.remote_address NOT LIKE '172.30.%'
  AND s.remote_address NOT LIKE '172.31.%'
  AND s.remote_address NOT LIKE '::ffff:172.%'
  AND s.remote_address NOT LIKE '10.%'
  AND s.remote_address NOT LIKE '::ffff:10.%'
  AND s.remote_address NOT LIKE 'fc00:%'
  AND s.state != 'LISTEN' -- Ignore most common application paths
  AND p.path NOT LIKE '/Applications/%.app/Contents/%'
  AND p.path NOT LIKE '/Library/Apple/System/Library/%'
  AND p.path NOT LIKE '/Library/Application Support/%/Contents/%'
  AND p.path NOT LIKE '/System/Applications/%'
  AND p.path NOT LIKE '/System/Library/%'
  AND p.path NOT LIKE '/Users/%/Library/%.app/Contents/MacOS/%'
  AND p.path NOT LIKE "/System/%"
  AND p.path NOT LIKE "/opt/homebrew/Cellar/%/bin/%"
  AND p.path NOT LIKE "/usr/libexec/%"
  AND p.path NOT LIKE "/usr/sbin/%"
  AND p.path NOT LIKE "/private/var/folders/%/go-build%/exe/%"
  AND NOT (
    remote_port = 53
    AND protocol IN (6, 17)
    AND p.name IN (
      '1password',
      'Acrobat Update Helper',
      'chainctl',
      'cloud_sql_proxy',
      'Code Helper',
      'com.apple.MobileSoftwareUpdate.UpdateBrainService',
      'cosign',
      'crc',
      'curl',
      'dig',
      'Evernote Helper',
      'figma_agent',
      'gh',
      'git-remote-http',
      'gitsign',
      'go',
      'grafana-server',
      'grype',
      'host',
      'htop',
      'istioctl',
      'k6',
      'k9s',
      'ko',
      'launcher',
      'ngrok',
      'nix',
      'node',
      'obs',
      'obs-browser-page',
      'obs-ffmpeg-mux',
      'obsidian',
      'opera',
      'ping',
      'Python',
      'python3.10',
      'Reflect',
      'Reflect Helper',
      'ruby',
      'sample',
      'ssh',
      'steam_osx',
      'syncthing',
      'tailscaled',
      'terraform',
      'tkn',
      'traceroute',
      'vcluster',
      'wget',
      'whois',
      'zoom'
    )
  )
  AND NOT exception_key IN (
    '22,6,500,ssh,,',
    '22,6,500,ssh,ssh,',
    '22,6,500,ssh,com.apple.openssh,Software Signing',
    '22,6,500,ssh,ssh-55554944fbf65684ab9b37c2bad3a27ef78b23f4,',
    '43,6,500,DropboxMacUpdate,com.dropbox.DropboxMacUpdate,Developer ID Application: Dropbox, Inc. (G7HH3F8CAK)',
    '443,17,500,Code Helper,com.microsoft.VSCode.helper,Developer ID Application: Microsoft Corporation (UBF8T346G9)',
    '443,17,500,Evernote Helper,com.evernote.Evernote.helper,Apple Mac OS Application Signing',
    '443,17,500,Reflect Helper,app.reflect.ReflectDesktop,Developer ID Application: Reflect App, LLC (789ULN5MZB)',
    '443,6,0,com.apple.MobileSoftwareUpdate.UpdateBrainService,com.apple.MobileSoftwareUpdate.UpdateBrainService,Software Signing',
    '443,6,0,launcher,launcher,Developer ID Application: Kolide Inc (YZ3EM74M78)',
    '443,6,0,nessusd,nessusd,Developer ID Application: Tenable, Inc. (4B8J598M7U)',
    '443,6,500,Acrobat Update Helper,com.adobe.ARMDCHelper,Developer ID Application: Adobe Inc. (JQ525L2MZD)',
    '443,6,500,bash,bash,',
    '443,6,500,chainctl,,',
    '443,6,500,,,',
    '443,6,500,chainctl,a.out,',
    '443,6,500,cloud_sql_proxy,a.out,',
    '443,6,500,Code Helper (Renderer),com.github.Electron.helper,Developer ID Application: Microsoft Corporation (UBF8T346G9)',
    '443,6,500,Code Helper,com.microsoft.VSCode.helper,Developer ID Application: Microsoft Corporation (UBF8T346G9)',
    '443,6,500,cosign,a.out,',
    '443,6,500,curl,com.apple.curl,Software Signing',
    '443,6,500,Electron,com.microsoft.VSCode,Developer ID Application: Microsoft Corporation (UBF8T346G9)',
    '443,6,500,Evernote Helper,com.evernote.Evernote.helper,Apple Mac OS Application Signing',
    '443,6,500,figma_agent,com.figma.agent,Developer ID Application: Figma, Inc. (T8RA8NE3B7)',
    '443,6,500,gh,gh,',
    '443,6,0,nix,nix,',
    '443,6,500,ctclient,a.out,',
    '443,6,500,git-remote-http,git-remote-http-55554944e5dca79a2b44332e941af547708b0c68,',
    '443,6,500,gitsign,,',
    '443,6,500,gitsign,a.out,',
    '443,6,500,go,a.out,',
    '443,6,500,go,org.golang.go,Developer ID Application: Google LLC (EQHXZ8M8AV)',
    '443,6,500,istioctl,a.out,',
    '443,6,500,ko,a.out,',
    '443,6,500,step,step,',
    '443,6,500,kubectl,a.out,',
    '443,6,500,main,a.out,',
    '443,6,500,Python,org.python.python,',
    '443,6,500,python3.10,python3.10,',
    '443,6,500,Reflect Helper,app.reflect.ReflectDesktop,Developer ID Application: Reflect App, LLC (789ULN5MZB)',
    '443,6,500,Reflect,app.reflect.ReflectDesktop,Developer ID Application: Reflect App, LLC (789ULN5MZB)',
    '443,6,500,sample,com.apple.dt.SamplingTools.sample,Software Signing',
    '443,6,500,steam_osx,com.valvesoftware.steam,Developer ID Application: Valve Corporation (MXGJJ98X76)',
    '443,6,500,terraform-ls,terraform-ls,Developer ID Application: Hashicorp, Inc. (D38WU7D763)',
    '443,6,500,terraform,terraform,Developer ID Application: Hashicorp, Inc. (D38WU7D763)',
    '443,6,500,vim,vim,',
    '443,6,500,zsh,com.apple.zsh,Software Signing',
    '53,17,500,docker-credential-gcr,a.out,',
    '6000,6,500,ssh,,',
    '443,6,500,git-remote-http,git-remote-http-55554944ce011d0e889a3cf58e5ac97ac15728f3,',
    '6000,6,500,ssh,com.apple.openssh,Software Signing',
    '6000,6,500,ssh,ssh-55554944fbf65684ab9b37c2bad3a27ef78b23f4,',
    '80,6,0,com.apple.MobileSoftwareUpdate.UpdateBrainService,com.apple.MobileSoftwareUpdate.UpdateBrainService,Software Signing'
  )

  -- nix-shell infects children with open connections
  AND NOT (
    parent_cmd LIKE "%/tmp/nix-shell%"
    AND remote_port = 443
    AND protocol = 6
  )

  -- These programs would normally never make an outgoing connection, but thanks to Nix, it can happen.
  AND NOT (
    remote_address LIKE ("151.101.%")
    AND remote_port = 443
    AND protocol = 6
    AND (
      parent_path LIKE "%/bash"
      OR parent_path LIKE "%/zsh"
    )
  )

  -- More complicated patterns go here
  AND NOT (
    p.name = 'syncthing'
    AND (
      remote_port IN (53, 80, 88, 110, 443, 587, 993, 3306, 7451)
      OR remote_port > 8000
    )
  )
  AND NOT (
    p.name IN (
      'Google Chrome Helper',
      'Brave Browser Helper',
      'Chromium Helper',
      'Opera Helper'
    )
    AND remote_port IN (
      53,
      443,
      80,
      8009,
      8080,
      8888,
      8443,
      5228,
      32211,
      53,
      10001,
      3478,
      19305,
      19306,
      5004,
      9000,
      19307,
      19308,
      19309
    )
  )
  AND NOT (
    p.name IN ('Mail', 'thunderbird', 'Spark', 'Notes')
    AND remote_port IN (53, 143, 443, 587, 465, 585, 993)
  )
  AND NOT (
    p.name IN ('Spotify Helper', 'Spotify')
    AND remote_port IN (53, 443, 8009, 4070, 32211)
  )
  AND NOT (
    remote_port IN (53, 443)
    AND p.name LIKE 'terraform-provider-%'
  )
  AND NOT (
    remote_port IN (53, 443)
    AND p.name LIKE 'kubectl.%'
  )
  AND NOT (
    p.cmdline LIKE '%google-cloud-sdk/lib/gcloud.py%'
    AND remote_port IN (80, 43, 53)
  )
GROUP BY s.pid