Persistence (TA0003)(external, opens in a new tab or window)
Execution (TA0002)(external, opens in a new tab or window)
Command and Control (TA0011)(external, opens in a new tab or window)
text code block:from logs-endpoint.events.file-* metadata _id, _index, _version // Ensure event.action values in a list are expanded | mv_expand event.action | where host.os.type == "linux" and event.action == "creation" and ( process.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.name like "php-fpm*" or user.name in ("apache", "www-data", "httpd", "nginx", "lighttpd", "tomcat", "tomcat8", "tomcat9") or user.id in ("33", "498", "48") ) | keep @timestamp, _id, _index, _version, host.os.type, event.action, user.name, user.id, process.name, process.executable, file.path, 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, file.path | where Esql.agent_id_count_distinct == 1 and Esql.event_count < 5
Install detection rules in Elastic Security
Detect Unusual File Creation by Web Server in the Elastic Security detection engine by installing this rule into your Elastic Stack.
To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).