Vaikora - High severity AI agent action detected

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Id	15c49777-7cb7-4746-8064-6fa4c7a73df8
Rulename	Vaikora - High severity AI agent action detected
Description	Identifies AI agent actions from Vaikora classified as high or critical severity. These events may indicate an agent operating outside safe parameters or triggering policy thresholds.
Severity	High
Tactics	Impact Execution PrivilegeEscalation
Techniques	T1059 T1078 T1548
Required data connectors	VaikoraSentinel
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	GreaterThan
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vaikora-Sentinel/Analytic Rules/Vaikora - High Risk AI Agent Action.yaml
Version	1.0.0
Arm template	15c49777-7cb7-4746-8064-6fa4c7a73df8.json

KQL

Vaikora_AgentSignals_CL
| where TimeGenerated > ago(1h)
| where severity_s in ("high", "critical")
| summarize
    ActionCount = count(),
    MaxAnomalyScore = max(anomaly_score_d),
    Actions = make_set(action_type_s),
    PolicyDecisions = make_set(policy_decision_s),
    ResourceTypes = make_set(resource_type_s),
    LogHashes = make_set(log_hash_s)
  by AgentId = agent_id_s, Severity = severity_s
| extend
    ActionList = strcat_array(Actions, ", "),
    PolicyList = strcat_array(PolicyDecisions, ", "),
    ResourceList = strcat_array(ResourceTypes, ", ")

YAML

queryPeriod: 1h
description: |
    Identifies AI agent actions from Vaikora classified as high or critical severity. These events may indicate an agent operating outside safe parameters or triggering policy thresholds.
relevantTechniques:
- T1059
- T1078
- T1548
triggerThreshold: 0
customDetails:
  ActionCount: ActionCount
  PolicyDecisions: PolicyList
  MaxAnomalyScore: MaxAnomalyScore
  Actions: ActionList
  ResourceTypes: ResourceList
id: 15c49777-7cb7-4746-8064-6fa4c7a73df8
queryFrequency: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vaikora-Sentinel/Analytic Rules/Vaikora - High Risk AI Agent Action.yaml
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    groupByEntities:
    - Account
    matchingMethod: Selected
    enabled: true
    reopenClosedIncident: false
    lookbackDuration: 1h
query: |
  Vaikora_AgentSignals_CL
  | where TimeGenerated > ago(1h)
  | where severity_s in ("high", "critical")
  | summarize
      ActionCount = count(),
      MaxAnomalyScore = max(anomaly_score_d),
      Actions = make_set(action_type_s),
      PolicyDecisions = make_set(policy_decision_s),
      ResourceTypes = make_set(resource_type_s),
      LogHashes = make_set(log_hash_s)
    by AgentId = agent_id_s, Severity = severity_s
  | extend
      ActionList = strcat_array(Actions, ", "),
      PolicyList = strcat_array(PolicyDecisions, ", "),
      ResourceList = strcat_array(ResourceTypes, ", ")  
entityMappings:
- fieldMappings:
  - columnName: AgentId
    identifier: Name
  entityType: Account
eventGroupingSettings:
  aggregationKind: AlertPerResult
triggerOperator: GreaterThan
suppressionEnabled: false
tactics:
- Impact
- Execution
- PrivilegeEscalation
status: Available
name: Vaikora - High severity AI agent action detected
version: 1.0.0
severity: High
requiredDataConnectors:
- connectorId: VaikoraSentinel
  dataTypes:
  - Vaikora_AgentSignals_CL
kind: Scheduled
suppressionDuration: 1h

ARM