[New Rule] Sudo Command Enumeration Detected

rules/linux/discovery_sudo_allowed_command_enumeration.toml

@@ -0,0 +1,45 @@
+[metadata]
+creation_date = "2023/07/20"
+integration = ["endpoint"]
+maturity = "production"
+min_stack_comments = "New fields added: required_fields, related_integrations, setup"
+min_stack_version = "8.3.0"
+updated_date = "2023/07/24"
+
+[rule]
+author = ["Elastic"]
+description = """
+This rule monitors for the usage of the sudo -l command, which is used to list the allowed and forbidden commands for 
+the invoking user. Attackers may execute this command to enumerate commands allowed to be executed with sudo permissions,
+potentially allowing to escalate privileges to root. 
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.*"]
+language = "eql"
+license = "Elastic License v2"
+name = "Sudo Command Enumeration Detected"
+risk_score = 21
+rule_id = "28d39238-0c01-420a-b77a-24e5a7378663"
+severity = "low"
+tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Discovery"]
+timestamp_override = "event.ingested"
+type = "eql"
+query = '''
+process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and 
+process.name == "sudo" and process.args == "-l" and 
+process.parent.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish") and 
+not group.Ext.real.id : "0" and not user.Ext.real.id : "0"
+'''
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[[rule.threat.technique]]
+id = "T1033"
+name = "System Owner/User Discovery"
+reference = "https://attack.mitre.org/techniques/T1033/"
+
+[rule.threat.tactic]
+id = "TA0007"
+name = "Discovery"
+reference = "https://attack.mitre.org/tactics/TA0007/"