124 lines
4.0 KiB
SQL
124 lines
4.0 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/T1016/ (System Network Configuration Discovery)
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--
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-- tags: transient process state often extra events
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-- platform: darwin
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-- interval: 600
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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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s.authority AS p0_authority,
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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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pe_sig1.authority AS p1_authority,
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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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COALESCE(
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p1_p2_sig.authority,
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pe1_p2_sig.authority,
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pe1_pe2_sig.authority
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) AS p2_authority,
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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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LEFT JOIN signature s ON pe.path = s.path
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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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LEFT JOIN signature pe_sig1 ON pe1.path = pe_sig1.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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LEFT JOIN signature p1_p2_sig ON p1_p2.path = p1_p2_sig.path
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LEFT JOIN signature pe1_p2_sig ON pe1_p2.path = pe1_p2_sig.path
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LEFT JOIN signature pe1_pe2_sig ON pe1_pe2.path = pe1_pe2_sig.path
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WHERE
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pe.path IN (
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'/sbin/ifconfig',
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'/usr/sbin/netstat',
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'/usr/bin/nscurl',
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'/sbin/pfctl',
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'/usr/libexec/ApplicationFirewall/socketfilterfw'
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)
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AND uptime.total_seconds > 30
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AND pe.time > (strftime('%s', 'now') -600)
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AND pe.cmdline != ''
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AND pe.cmdline IS NOT NULL
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AND pe.status == 0
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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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'kitty',
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'login',
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'tmux',
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'ShellLauncher',
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'sudo',
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'tmux:server',
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'zsh'
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)
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)
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AND NOT exception_key IN (
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'ifconfig,0,cloud-provider-kind,sudo',
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'ifconfig,0,pia-daemon,launchd',
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'ifconfig,0,pia-openvpn,pia-daemon',
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'ifconfig,500,dotnet,dotnet',
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'ifconfig,500,dotnet,zsh',
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'ifconfig,500,Python,Code Helper (Plugin)',
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'ifconfig,500,zsh,stable',
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'netstat,0,io.tailscale.ipn.macsys.network-extension,launchd',
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'netstat,0,metricbeat,elastic-agent',
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'netstat,0,pia-daemon,launchd',
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'netstat,500,AccountSubscriber,launchd',
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'netstat,500,coresymbolicationd,launchd',
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'netstat,500,IPNExtension,launchd',
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'pfctl,0,bash,pia-daemon',
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'pfctl,0,pia-daemon,launchd',
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'socketfilterfw,0,launcher,launchd'
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)
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AND p1_cmd NOT IN ('/bin/sh /etc/periodic/daily/420.status-network')
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AND p1_authority != 'Software Signing'
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GROUP BY
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pe.pid
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