[New Rule] Clearing Windows Security Logs

rules/windows/defense_evasion_clearing_windows_security_logs.toml

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+[metadata]
+creation_date = "2020/11/12"
+maturity = "production"
+updated_date = "2021/01/11"
+
+[rule]
+author = ["Elastic", "Anabella Cristaldi"]
+description = """
+Identifies attempts to clear Windows event log stores. This is often done by attackers in an attempt to evade
+detection or destroy forensic evidence on a system.
+"""
+from = "now-9m"
+index = ["winlogbeat-*"]
+language = "kuery"
+license = "Elastic License"
+name = "Windows Event Logs Cleared"
+risk_score = 21
+rule_id = "45ac4800-840f-414c-b221-53dd36a5aaf7"
+severity = "low"
+tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
+type = "query"
+
+query = '''
+event.action:("audit-log-cleared" or "Log clear")
+'''
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1070"
+name = "Indicator Removal on Host"
+reference = "https://attack.mitre.org/techniques/T1070/"
+[rule.threat.tactic]
+id = "TA0005"
+name = "Defense Evasion"
+reference = "https://attack.mitre.org/tactics/TA0005/"