-- Find programs where fd0 (stdin), fd1 (stdout), or fd2 (stderr) are connected to a socket
--
-- false positives:
--   * none known
--
-- references:
--   * https://www.deepinstinct.com/blog/bpfdoor-malware-evolves-stealthy-sniffing-backdoor-ups-its-game
--
-- tags: process state
-- platform: posix
SELECT pos.protocol,
    pos.pid,
    pos.remote_address,
    pos.local_address,
    pos.local_port,
    pos.remote_port,
    pos.state,
    -- Child
    p0.pid AS p0_pid,
    p0.path AS p0_path,
    p0.name AS p0_name,
    p0.start_time AS p0_start,
    p0.cmdline AS p0_cmd,
    p0.cwd AS p0_cwd,
    p0.cgroup_path AS p0_cgroup,
    p0.euid AS p0_euid,
    p0_hash.sha256 AS p0_sha256,
    -- Parent
    p0.parent AS p1_pid,
    p1.path AS p1_path,
    p1.name AS p1_name,
    p1.start_time AS p1_start,
    p1.euid AS p1_euid,
    p1.cmdline AS p1_cmd,
    p1_hash.sha256 AS p1_sha256,
    -- Grandparent
    p1.parent AS p2_pid,
    p2.name AS p2_name,
    p2.start_time AS p2_start,
    p2.path AS p2_path,
    p2.cmdline AS p2_cmd,
    p2_hash.sha256 AS p2_sha256
FROM process_open_sockets pos
    JOIN processes p0 ON pos.pid = p0.pid
    LEFT JOIN hash p0_hash ON p0.path = p0_hash.path
    LEFT JOIN processes p1 ON p0.parent = p1.pid
    LEFT JOIN hash p1_hash ON p1.path = p1_hash.path
    LEFT JOIN processes p2 ON p1.parent = p2.pid
    LEFT JOIN hash p2_hash ON p2.path = p2_hash.path
WHERE pos.fd < 3
    AND pos.family != 1
    AND p0.path NOT IN ('/usr/libexec/bootpd')