Command and Control (TA0011)(external, opens in a new tab or window)
text code block:sequence by host.id, process.entity_id with maxspan=5s [network where host.os.type == "linux" and event.type == "start" and event.action == "connection_attempted" and process.executable like ( "/boot/*", "/dev/shm/*", "/tmp/*", "/var/tmp/*", "/var/log/*", "/var/run/user/*", "/run/user/*" ) and not ( destination.ip == null or destination.ip == "0.0.0.0" or cidrmatch( 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", "FC00::/7" ) )] [file where host.os.type == "linux" and event.type == "creation" and process.executable like ( "/boot/*", "/dev/shm/*", "/tmp/*", "/var/tmp/*", "/var/log/*", "/boot/*", "/var/run/user/*", "/run/user/*" ) and not ( file.name like "tmp*" or file.extension in ("sqlite-journal", "db-journal", "lockfile", "tmp") or file.path like ( "/loki/wal/*", "/dev/shm/.org.chromium.Chromium.*", "/opt/rapid7/nexpose/*", "/usr/local/ltechagent*", "/var/lib/cloudendure/agent_keystore_temp", "/var/cache/yum/*", "/run/aws-node/ipam.json.tmp*", "/run/systemd/journal/streams/.*" ) or (process.executable == "/tmp/terraform" and file.path like "/tmp/terraform-provider*") or process.name in ("podman", "minikube", "logrotate", "java", "aws-k8s-agent", "grafana", "postman") or process.executable : ( "/etc/cron.daily/logrotate", "/etc/update-motd.d/50-motd-news", "/etc/cron.hourly/0yum-hourly.cron", "/etc/cron.hourly/BitdefenderRedline", "/tmp/token_handler", "/tmp/.sentry-cli*.exe", "/etc/cron.daily/0yum-daily.cron", "/etc/init.d/fortiedr" ) )]
Install detection rules in Elastic Security
Detect Network Connection Followed by File Creation 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).