Persistence (TA0003)(opens in a new tab or window)
sequence by host.id, user.id with maxspan=1s
[process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and process.name == "sshd" and
process.args == "-D" and process.args == "-R"] by process.pid, process.entity_id
[process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and process.parent.name == "sshd" and
process.executable != null and not (
process.executable in ("/usr/sbin/sshd", "/usr/sbin/unix_chkpwd", "/usr/bin/google_authorized_keys", "/usr/bin/fipscheck") or
process.args like ("rsync*", "systemctl*", "/usr/sbin/unix_chkpwd", "/usr/bin/google_authorized_keys", "/usr/sbin/aad_certhandler*") or
process.command_line like "sh -c /usr/bin/env -i PATH=*"
)] by process.parent.pid, process.parent.entity_id
[process where host.os.type == "linux" and event.action == "end" and process.name == "sshd" and process.exit_code != 0] by process.pid, process.entity_id
[network where host.os.type == "linux" and event.type == "end" and event.action == "disconnect_received" and process.name == "sshd"] by process.pid, process.entity_id
Install detection rules in Elastic Security
Detect Potential Execution via XZBackdoor 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(opens in a new tab or window).