from logs-endpoint.events.process-*
| where
    @timestamp > now() - 1h and
    host.os.type == "linux" and
    event.type == "start" and
    event.action == "exec" and (
        (
            process.name in ("base64", "base64plain", "base64url", "base64mime", "base64pem", "base32", "base16") and
            process.command_line like "*-*d*"
        ) or
        (
            process.name == "openssl" and
            process.args == "enc" and
            process.args in ("-d", "-base64", "-a")
        ) or
        (
            process.name like "python*" and (
                (
                    process.args == "base64" and
                    process.args in ("-d", "-u", "-t")
                ) or
                (
                    process.args == "-c" and
                    process.command_line like "*base64*" and
                    process.command_line like "*b64decode*"
                )
            )
        ) or
        (
            process.name like "perl*" and
            process.command_line like "*decode_base64*"
        ) or
        (
            process.name like "ruby*" and
            process.args == "-e" and
            process.command_line like "*Base64.decode64*"
        )
    )
| keep
    @timestamp,
    host.os.type,
    event.type,
    event.action,
    process.name,
    process.args,
    process.command_line,
    agent.id,
    host.name
| 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)
    by process.name, process.command_line
| where
    Esql.agent_id_count_distinct == 1 and
    Esql.event_count < 15
| sort Esql.event_count asc
| limit 100