mirror of
https://github.com/chainguard-dev/osquery-defense-kit
synced 2024-12-23 22:32:04 +00:00
119 lines
3.4 KiB
SQL
119 lines
3.4 KiB
SQL
-- Suspicious parenting of fetch tools (event-based)
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--
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-- refs:
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-- * https://attack.mitre.org/techniques/T1105/ (Ingress Tool Transfer)
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--
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-- tags: transient process state often
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-- platform: posix
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-- interval: 900
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SELECT
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pe.path AS child_path,
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REGEX_MATCH (pe.path, '.*/(.*)', 1) AS child_name,
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TRIM(pe.cmdline) AS child_cmd,
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pe.pid AS child_pid,
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p.cgroup_path AS child_cgroup,
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p.parent AS parent_pid,
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TRIM(IIF(pp.cmdline != NULL, pp.cmdline, ppe.cmdline)) AS parent_cmd,
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TRIM(IIF(pp.path != NULL, pp.path, ppe.path)) AS parent_path,
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IIF(pp.path != NULL, phash.sha256, pehash.sha256) AS parent_hash,
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REGEX_MATCH (
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IIF(pp.path != NULL, pp.path, ppe.path),
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'.*/(.*)',
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1
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) AS parent_name,
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TRIM(IIF(gp.cmdline != NULL, gp.cmdline, gpe.cmdline)) AS gparent_cmd,
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TRIM(IIF(gp.path != NULL, gp.path, gpe.path)) AS gparent_path,
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IIF(gp.path != NULL, gphash.sha256, gpehash.path) AS gparent_hash,
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REGEX_MATCH (
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IIF(gp.path != NULL, gp.path, gpe.path),
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'.*/(.*)',
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1
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) AS gparent_name,
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IIF(pp.parent != NULL, pp.parent, ppe.parent) AS gparent_pid,
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CONCAT (
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REGEX_MATCH (pe.path, '.*/(.*)', 1),
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',',
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MIN(pe.euid, 500),
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',',
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REGEX_MATCH (
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IIF(pp.path != NULL, pp.path, ppe.path),
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'.*/(.*)',
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1
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),
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',',
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REGEX_MATCH (
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IIF(gp.path != NULL, gp.path, gpe.path),
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'.*/(.*)',
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1
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)
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) AS exception_key
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FROM
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process_events pe
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LEFT JOIN processes p ON pe.pid = p.pid
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LEFT JOIN processes pp ON pe.parent = pp.pid
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LEFT JOIN hash phash ON pp.path = phash.path
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LEFT JOIN process_events ppe ON pe.parent = ppe.pid
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LEFT JOIN hash pehash ON ppe.path = pehash.path
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LEFT JOIN processes gp ON gp.pid = pp.parent
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LEFT JOIN hash gphash ON gp.path = gphash.path
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LEFT JOIN process_events gpe ON ppe.parent = gpe.pid
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LEFT JOIN hash gpehash ON gpe.path = gpehash.path
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WHERE
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-- NOTE: The remainder of this query is synced with unexpected-fetcher-parents
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child_name IN ('curl', 'wget', 'ftp', 'tftp')
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AND pe.time > (strftime('%s', 'now') -900) -- Ignore partial table joins
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AND NOT exception_key IN (
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'curl,0,nm-dispatcher,',
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'curl,0,nm-dispatcher,nm-dispatcher',
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'curl,500,bash,nix-daemon',
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'curl,500,bash,ShellLauncher',
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'curl,500,bash,zsh',
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'curl,500,env,env',
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'curl,500,fish,gnome-terminal-',
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'curl,500,ruby,zsh',
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'curl,500,ShellLauncher,',
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'curl,500,ShellLauncher,login',
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'curl,500,zsh,login',
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'curl,500,zsh,sh',
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'wget,500,env,env'
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)
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AND NOT (
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pe.euid > 500
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AND parent_name IN ('sh', 'fish', 'zsh', 'bash', 'dash')
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AND gparent_name IN (
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'alacritty',
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'gnome-terminal-',
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'kitty',
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'login',
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'roxterm',
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'tmux',
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'tmux:server',
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'wezterm-gui',
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'zsh'
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)
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)
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AND NOT parent_name IN ('yay', 'nvim')
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AND NOT (
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pe.euid > 500
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AND child_cmd IN ('curl --fail https://ipinfo.io/timezone')
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)
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AND NOT (
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pe.euid > 500
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AND parent_name = 'env'
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AND parent_cmd LIKE '/usr/bin/env -i % HOMEBREW_BREW_FILE=%'
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)
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AND NOT (
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pe.euid > 500
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AND parent_name = 'ruby'
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AND parent_cmd LIKE '%/opt/homebrew/Library/Homebrew/brew.rb%'
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)
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AND NOT (
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pe.euid > 500
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AND parent_name = 'env'
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AND parent_cmd LIKE '/usr/bin/env bash ./hack/%.sh'
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)
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AND NOT child_cmd LIKE 'wget --no-check-certificate https://github.com/istio/istio/%'
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AND NOT p.cgroup_path LIKE '/system.slice/docker-%'
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GROUP BY
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pe.pid
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