✄𐘗
text code block:
✄𐘗from logs-endpoint.events.process-* metadata _id, _index, _version
| mv_expand event.action
| where
    host.os.type == "linux" and
    event.type == "start" and
    event.action == "exec" and (
      (
        process.parent.name in (
            "apache", "nginx", "apache2", "httpd", "lighttpd", "caddy", "mongrel_rails", "gunicorn",
            "uwsgi", "openresty", "cherokee", "h2o", "resin", "puma", "unicorn", "traefik", "tornado", "hypercorn",
            "daphne", "twistd", "yaws", "webfsd", "httpd.worker", "flask", "rails", "mongrel", "php-cgi",
            "php-fcgi", "php-cgi.cagefs", "catalina.sh", "hiawatha", "lswsctrl"
        ) or
        process.parent.name like "php-fpm*" or
        user.name in ("apache", "www-data", "httpd", "nginx", "lighttpd", "tomcat", "tomcat8", "tomcat9") or
        user.id in ("33", "498", "48") or
        (process.parent.name == "java" and process.parent.working_directory like "/u0?/*") or
        process.parent.working_directory like "/var/www/*"
      )
    ) and (
        process.name in (
          "bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish", "socat", "openssl", "busybox",
          "nc", "ncat", "netcat", "nc.openbsd", "nc.traditional", "nohup", "setsid", "mkfifo", "mknod",
          "node", "socket"
        ) or
        process.name like "python*" or
        process.name like "php*" or
        process.name like "perl" or
        process.name like "ruby*" or
        process.name like "lua*" or
        process.executable like "/tmp/*" or
        process.executable like "/var/tmp/*" or
        process.executable like "/dev/shm/*" or
        process.executable like "/var/log/*" or
        process.executable like "/sys/*" or
        process.executable like "/media/*" or
        process.executable like "/proc/*" or
        process.executable like "/var/backups/*" or
        process.executable like "/var/mail/*" or
        process.executable like "/var/spool/*" or
        process.executable like "/var/www/*" or
        process.executable like "./*" or
        process.name like ".*"
    ) and    
    not (
        process.working_directory like "/home/*" or
        process.working_directory == "/" or
        process.working_directory like "/var/www/*.ch" or
        process.parent.executable like "/vscode/vscode-server/*"
    )

| keep
    @timestamp,
    _id,
    _index,
    _version,
    host.os.type,
    event.type,
    event.action,
    process.parent.name,
    user.name,
    user.id,
    process.working_directory,
    process.parent.working_directory,
    process.name,
    process.executable,
    process.command_line,
    process.parent.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, process.working_directory, process.parent.executable

| where
    Esql.agent_id_count_distinct == 1 and
    Esql.event_count < 5
| sort Esql.event_count asc

// 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)

| keep agent.id, host.name, process.executable, process.working_directory, process.parent.executable, Esql.*