130 lines
3.9 KiB
SQL
130 lines
3.9 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 extra events
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-- platform: posix
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-- interval: 450
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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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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.time AS p0_time,
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pe.euid AS p0_euid,
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p.cgroup_path AS p0_cgroup,
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-- Parent
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pe.parent AS p1_pid,
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p1.cgroup_path AS p1_cgroup,
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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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COALESCE(p1_p2.cgroup_path, pe1_p2.cgroup_path) AS p2_cgroup,
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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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-- Exception key
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REGEX_MATCH (pe.path, '.*/(.*)', 1) || ',' || MIN(pe.euid, 500) || ',' || REGEX_MATCH (COALESCE(p1.path, pe1.path), '.*/(.*)', 1) || ',' || 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 exception_key
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FROM
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process_events pe,
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uptime
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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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-- NOTE: The remainder of this query is synced with unexpected-fetcher-parents
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pe.cmdline != ''
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AND pe.time > (strftime('%s', 'now') -450)
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AND p0_name IN ('curl', 'wget', 'ftp', 'tftp')
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AND NOT exception_key IN (
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'curl,0,nm-dispatcher,',
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'curl,500,bash,bash',
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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,bash,yay',
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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 p1_name IN ('sh', 'fish', 'zsh', 'bash', 'dash')
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AND p2_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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'stable',
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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 p1_name IN ('yay', 'nvim')
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AND NOT (
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pe.euid > 500
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AND p0_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 p1_name = 'env'
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AND p1_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 p1_name = 'ruby'
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AND p1_cmd LIKE '%/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 p1_name = 'env'
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AND p1_cmd LIKE '/usr/bin/env bash ./hack/%.sh'
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)
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AND NOT p0_cmd LIKE 'wget --no-check-certificate https://github.com/istio/istio/%'
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AND NOT p0_cmd LIKE '%curl -L https://artifacts.elastic.co/%'
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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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