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:sequence by host.id, process.entity_id with maxspan=1s [ process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and process.executable : ( "./*", "/tmp/*", "/var/tmp/*", "/var/www/*", "/dev/shm/*", "/etc/init.d/*", "/etc/rc*.d/*", "/etc/crontab", "/etc/cron.*", "/etc/update-motd.d/*", "/usr/lib/update-notifier/*", "/boot/*", "/srv/*", "/run/*", "/root/*", "/etc/rc.local" ) and process.parent.name : ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish") and not process.name : ("curl", "wget", "ping", "apt", "dpkg", "yum", "rpm", "dnf", "dockerd") ] [ network where host.os.type == "linux" and event.type == "start" and event.action in ("connection_attempted", "connection_accepted") and process.executable : ( "./*", "/tmp/*", "/var/tmp/*", "/var/www/*", "/dev/shm/*", "/etc/init.d/*", "/etc/rc*.d/*", "/etc/crontab", "/etc/cron.*", "/etc/update-motd.d/*", "/usr/lib/update-notifier/*", "/boot/*", "/srv/*", "/run/*", "/root/*", "/etc/rc.local" ) and destination.ip != null and destination.ip != "127.0.0.1" and destination.ip != "::1" ] [ process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and process.name : ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish") and process.parent.name : ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish") ]
Install detection rules in Elastic Security
Detect Potential Reverse Shell via Suspicious Binary 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).