Unexpected Icmp Socket
osquery
Unexpected programs speaking over ICMP (state-based)
Description
ODK (osquery-defense-kit) is unique in that the queries are designed to be used as part of a production detection & response pipeline. The detection queries are formulated to return zero rows during normal expected behavior, so that they may be configured to generate alerts when rows are returned.
Query
-- Unexpected programs speaking over ICMP (state-based)
--
-- references:
-- *https://attack.mitre.org/techniques/T1095/ (C2: Non-Application Layer Protocol)
--
-- tags: transient state net extra
SELECT
pop.pid AS p0_pid,
pop.socket,
pop.local_address,
pop.remote_address,
-- Child
p0.path AS p0_path,
p0.name AS p0_name,
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.cmdline AS p1_cmd,
p1_hash.sha256 AS p1_sha256,
-- Grandparent
p1.parent AS p2_pid,
p2.name AS p2_name,
p2.path AS p2_path,
p2.cmdline AS p2_cmd,
p2_hash.sha256 AS p2_sha256
FROM
process_open_sockets pop
LEFT JOIN processes p0 ON pop.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
pop.family = 2 -- PF_INET
AND pop.protocol = 1 -- ICMP
AND p0.name NOT IN ('ping')
GROUP BY
p0_pidtags: SStagSS