[New] Unusual Network Connection to Suspicious Top Level Domain

rules/macos/command_and_control_unusual_connection_to_suspicious_top_level_domain.toml

@@ -0,0 +1,67 @@
+[metadata]
+creation_date = "2025/03/25"
+integration = ["endpoint"]
+maturity = "production"
+updated_date = "2025/03/25"
+
+[rule]
+author = ["Elastic"]
+description = """
+This rule monitors for the unusual occurrence of outbound network connections to suspicious top level domains. 
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.network-*"]
+language = "kuery"
+license = "Elastic License v2"
+name = "Unusual Network Connection to Suspicious Top Level Domain"
+risk_score = 47
+rule_id = "ffa676dc-09b0-11f0-94ba-b66272739ecb"
+severity = "medium"
+tags = [
+    "Domain: Endpoint",
+    "OS: macOS",
+    "Use Case: Threat Detection",
+    "Tactic: Command and Control",
+    "Data Source: Elastic Defend"
+]
+timestamp_override = "event.ingested"
+type = "new_terms"
+query = '''
+event.category : "network" and host.os.type : "macos" and event.type : "start" and
+destination.domain : (*.team or *.lol or *.kr or *.ke or *.nu or *.space or 
+                          *.capital or *.in or *.cfd or *.online or *.ru or 
+                          *.info or *.top or *.buzz or *.xyz or *.rest or 
+                          *.ml or *.cf or *.gq or *.ga or *.onion or 
+                          *.network or *.monster or *.marketing or *.cyou or 
+                          *.quest or *.cc or *.bar or *.click or *.cam or 
+                          *.surf or *.tk or *.shop or *.club or *.icu or 
+                          *.pw or *.ws or *.hair or *.mom or 
+                          *.beauty or *.boats or *.fun or *.life or 
+                          *.store)
+'''
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[[rule.threat.technique]]
+id = "T1071"
+name = "Application Layer Protocol"
+reference = "https://attack.mitre.org/techniques/T1071/"
+
+[[rule.threat.technique.subtechnique]]
+id = "T1071.001"
+name = "Web Protocols"
+reference = "https://attack.mitre.org/techniques/T1071/001/"
+
+[rule.threat.tactic]
+id = "TA0011"
+name = "Command and Control"
+reference = "https://attack.mitre.org/tactics/TA0011/"
+
+[rule.new_terms]
+field = "new_terms_fields"
+value = ["host.id", "process.executable", "destination.domain"]
+
+[[rule.new_terms.history_window_start]]
+field = "history_window_start"
+value = "now-7d"