file where host.os.type == "linux" and event.type == "change" and process.executable : ("/usr/sbin/sshd", "/usr/bin/ssh") and
(
(file.name : (".*", "~*", "*~") and not file.name : (".cache", ".viminfo", ".bash_history", ".google_authenticator",
".jelenv", ".csvignore", ".rtreport")) or
file.extension : ("in", "out", "ini", "h", "gz", "so", "sock", "sync", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9") or
file.path :
(
"/private/etc/*--",
"/usr/share/*",
"/usr/include/*",
"/usr/local/include/*",
"/private/tmp/*",
"/private/var/tmp/*",
"/usr/tmp/*",
"/usr/share/man/*",
"/usr/local/share/*",
"/usr/lib/*.so.*",
"/private/etc/ssh/.sshd_auth",
"/usr/bin/ssd",
"/private/var/opt/power",
"/private/etc/ssh/ssh_known_hosts",
"/private/var/html/lol",
"/private/var/log/utmp",
"/private/var/lib",
"/var/run/sshd/sshd.pid",
"/var/run/nscd/ns.pid",
"/var/run/udev/ud.pid",
"/var/run/udevd.pid"
)
)
Install detection rules in Elastic Security
Detect Potential OpenSSH Backdoor Logging Activity 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).