[New Rule] Azure Active Directory High Risk User AtRisk or Confirmed (#1579)

* Create initial_access_azure_active_directory_high_risk_signin_atrisk_or_confirmed.toml * Update initial_access_azure_active_directory_high_risk_signin_atrisk_or_confirmed.toml * Update initial_access_azure_active_directory_high_risk_signin_atrisk_or_confirmed.toml * Update initial_access_azure_active_directory_high_risk_signin_atrisk_or_confirmed.toml * Update rules/integrations/azure/initial_access_azure_active_directory_high_risk_signin_atrisk_or_confirmed.toml Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com> * Update rules/integrations/azure/initial_access_azure_active_directory_high_risk_signin_atrisk_or_confirmed.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com> Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> (cherry picked from commit 3dd32608a0)
2021-11-17 16:38:12 -06:00
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+[metadata]
+creation_date = "2021/10/18"
+maturity = "production"
+updated_date = "2021/10/18"
+integration = "azure"
+
+[rule]
+author = ["Austin Songer"]
+description = """
+Identifies high risk Azure Active Directory (AD) sign-ins by leveraging Microsoft Identity Protection machine learning
+and heuristics. 
+"""
+from = "now-25m"
+index = ["filebeat-*", "logs-azure*"]
+language = "kuery"
+license = "Elastic License v2"
+name = "Azure Active Directory High Risk User Sign-in Heuristic"
+note = """## Config
+
+The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
+references = [
+    "https://docs.microsoft.com/en-us/azure/active-directory/reports-monitoring/reference-azure-monitor-sign-ins-log-schema",
+    "https://docs.microsoft.com/en-us/azure/active-directory/identity-protection/overview-identity-protection",
+    "https://docs.microsoft.com/en-us/azure/active-directory/identity-protection/howto-identity-protection-investigate-risk",
+]
+risk_score = 47
+rule_id = "26edba02-6979-4bce-920a-70b080a7be81"
+severity = "medium"
+tags = ["Elastic", "Cloud", "Azure", "Continuous Monitoring", "SecOps", "Identity and Access"]
+timestamp_override = "event.ingested"
+type = "query"
+
+
+query = '''
+event.dataset:azure.signinlogs and
+  azure.signinlogs.properties.risk_state:("confirmedCompromised" or "atRisk") and event.outcome:(success or Success)
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1078"
+name = "Valid Accounts"
+reference = "https://attack.mitre.org/techniques/T1078/"
+
+
+[rule.threat.tactic]
+id = "TA0001"
+name = "Initial Access"
+reference = "https://attack.mitre.org/tactics/TA0001/"
+