Defense Evasion (TA0005)(external, opens in a new tab or window)
Lateral Movement (TA0008)(external, opens in a new tab or window)
text code block:FROM logs-vsphere.log-* | WHERE data_stream.dataset == "vsphere.log" AND event.module == "vsphere" and host.ip is not null | EVAL Esql.message_lower = TO_LOWER(message) | EVAL Esql.ssh_enabled = CASE( Esql.message_lower LIKE "*ssh access has been enabled*" OR Esql.message_lower LIKE "*hostsvc/enable_ssh*", 1, 0 ), Esql.exec_installed_only_disabled = CASE( Esql.message_lower LIKE "*execinstalledonly*" AND ( Esql.message_lower LIKE "*false*" OR Esql.message_lower LIKE "* -i 0*" OR Esql.message_lower LIKE "* -v 0*" ), 1, 0 ), Esql.vib_force_install = CASE( Esql.message_lower LIKE "*vib install*" AND ( Esql.message_lower LIKE "* -f *" OR Esql.message_lower LIKE "* -f" OR Esql.message_lower LIKE "* --force *" OR Esql.message_lower LIKE "* --force" ), 1, 0 ) | WHERE Esql.ssh_enabled == 1 OR Esql.exec_installed_only_disabled == 1 OR Esql.vib_force_install == 1 | STATS Esql.ssh_enabled_count = SUM(Esql.ssh_enabled), Esql.exec_installed_only_disabled_count = SUM(Esql.exec_installed_only_disabled), Esql.vib_force_install_count = SUM(Esql.vib_force_install), Esql.message_values = VALUES(message), Esql.log_file_path_values = VALUES(vsphere.log.file.path), Esql.first_seen = MIN(@timestamp), Esql.last_seen = MAX(@timestamp) BY host.ip | WHERE Esql.ssh_enabled_count > 0 AND Esql.exec_installed_only_disabled_count > 0 AND Esql.vib_force_install_count > 0 | KEEP host.ip, Esql.ssh_enabled_count, Esql.exec_installed_only_disabled_count, Esql.vib_force_install_count, Esql.message_values, Esql.log_file_path_values, Esql.first_seen, Esql.last_seen
Install detection rules in Elastic Security
Detect ESXi Host Prepared for an Unsigned Install 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).