✄𐘗
text code block:
✄𐘗from logs-endpoint.events.network-* metadata _id, _index, _version

| mv_expand event.action 

| where
    host.os.type == "linux" and
    event.type == "start" and
    event.action == "connection_attempted" and
    destination.port in (22, 222, 2222, 10022, 2022, 2200, 62612, 8022) and
    not (
      cidr_match(
        destination.ip,
        "10.0.0.0/8", "127.0.0.0/8", "169.254.0.0/16", "172.16.0.0/12",
        "192.0.0.0/24", "192.0.0.0/29", "192.0.0.8/32", "192.0.0.9/32",
        "192.0.0.10/32", "192.0.0.170/32", "192.0.0.171/32", "192.0.2.0/24",
        "192.31.196.0/24", "192.52.193.0/24", "192.168.0.0/16", "192.88.99.0/24",
        "224.0.0.0/4", "100.64.0.0/10", "192.175.48.0/24", "198.18.0.0/15",
        "198.51.100.0/24", "203.0.113.0/24", "240.0.0.0/4", "::1", "FE80::/10", "FF00::/8"
      ) or
      process.executable in (
        "/usr/bin/rclone", "/usr/bin/sss_ssh_knownhostsproxy", "/usr/sbin/sshd", "/usr/bin/ssh",
        "/usr/local/bin/php", "/usr/sbin/apache2", "/usr/sbin/nginx", "/usr/local/bin/argocd-repo-server",
        "/opt/nessus/sbin/nessusd", "/usr/local/bin/source-controller"
      ) or
      process.executable like "/usr/local/efax/*"
    )

| keep
    @timestamp,
    _id,
    _index,
    _version,
    host.os.type,
    event.type,
    event.action,
    destination.port,
    destination.ip,
    process.executable,
    agent.id,
    host.name,
    event.dataset,
    data_stream.namespace

| stats
    Esql.event_count = count(),
    Esql.agent_id_count_distinct = count_distinct(agent.id),
    Esql.host_name_values = values(host.name),
    Esql.agent_id_values = values(agent.id),
    Esql.event_dataset_values = values(event.dataset),
    Esql.data_stream_namespace_values = values(data_stream.namespace)

  by process.executable, destination.port

| where
    Esql.agent_id_count_distinct == 1 and
    Esql.event_count >= 100

// Extract unique values to ECS fields for alerts exclusion
| eval agent.id = mv_min(Esql.agent_id_values),
       host.name = mv_min(Esql.host_name_values)

| sort Esql.event_count asc

| keep Esql.*, agent.id, host.name, process.executable, destination.port