-- Unexpected calls to sysctl (event-based) -- -- refs: -- * https://attack.mitre.org/techniques/T1497/001/ (Virtualization/Sandbox Evasion: System Checks) -- -- platform: linux -- interval: 600 SELECT -- Child pe.path AS p0_path, REGEX_MATCH (pe.path, '.*/(.*)', 1) AS p0_name, TRIM(pe.cmdline) AS p0_cmd, pe.cwd AS p0_cwd, pe.pid AS p0_pid, p.cgroup_path AS p0_cgroup, -- Parent pe.parent AS p1_pid, p1.cgroup_path AS p1_cgroup, TRIM(COALESCE(p1.cmdline, pe1.cmdline)) AS p1_cmd, COALESCE(p1.path, pe1.path) AS p1_path, COALESCE(p_hash1.sha256, pe_hash1.sha256) AS p1_hash, REGEX_MATCH (COALESCE(p1.path, pe1.path), '.*/(.*)', 1) AS p1_name, -- Grandparent COALESCE(p1.parent, pe1.parent) AS p2_pid, COALESCE(p1_p2.cgroup_path, pe1_p2.cgroup_path) AS p2_cgroup, TRIM( COALESCE(p1_p2.cmdline, pe1_p2.cmdline, pe1_pe2.cmdline) ) AS p2_cmd, COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path) AS p2_path, COALESCE( p1_p2_hash.path, pe1_p2_hash.path, pe1_pe2_hash.path ) AS p2_hash, REGEX_MATCH ( COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path), '.*/(.*)', 1 ) AS p2_name, -- Exception key REGEX_MATCH (pe.path, '.*/(.*)', 1) || ',' || MIN(pe.euid, 500) || ',' || REGEX_MATCH (COALESCE(p1.path, pe1.path), '.*/(.*)', 1) || ',' || REGEX_MATCH ( COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path), '.*/(.*)', 1 ) AS exception_key FROM process_events pe, uptime LEFT JOIN processes p ON pe.pid = p.pid -- Parents (via two paths) LEFT JOIN processes p1 ON pe.parent = p1.pid LEFT JOIN hash p_hash1 ON p1.path = p_hash1.path LEFT JOIN process_events pe1 ON pe.parent = pe1.pid AND pe1.cmdline != '' LEFT JOIN hash pe_hash1 ON pe1.path = pe_hash1.path -- Grandparents (via 3 paths) LEFT JOIN processes p1_p2 ON p1.parent = p1_p2.pid -- Current grandparent via parent processes LEFT JOIN processes pe1_p2 ON pe1.parent = pe1_p2.pid -- Current grandparent via parent events LEFT JOIN process_events pe1_pe2 ON pe1.parent = pe1_p2.pid AND pe1_pe2.cmdline != '' -- Past grandparent via parent events LEFT JOIN hash p1_p2_hash ON p1_p2.path = p1_p2_hash.path LEFT JOIN hash pe1_p2_hash ON pe1_p2.path = pe1_p2_hash.path LEFT JOIN hash pe1_pe2_hash ON pe1_pe2.path = pe1_pe2_hash.path WHERE pe.time > (strftime('%s', 'now') -600) AND pe.cmdline != '' AND ( pe.path IN ( '/usr/bin/sysctl', '/sbin/sysctl', '/usr/sbin/sysctl', '/usr/bin/chattr', '/sbin/chattr', '/usr/sbin/chattr', '/usr/bin/setenforce', '/sbin/setenforce', '/usr/sbin/setenforce', '/usr/bin/sqlite3' ) -- Used by LaZagne, through the Platform library OR ( pe.path IN ('/ur/bin/uname', '/bin/uname') AND pe.cmdline LIKE '%uname -p' ) ) AND p.parent > 0 GROUP BY pe.pid