Vaikora - High severity AI agent action detected | Microsoft Sentinel Analytic Rules

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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%20Rules/Vaikora%20-%20High%20Risk%20AI%20Agent%20Action.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

customDetails:
  Actions: ActionList
  ResourceTypes: ResourceList
  ActionCount: ActionCount
  MaxAnomalyScore: MaxAnomalyScore
  PolicyDecisions: PolicyList
tactics:
- Impact
- Execution
- PrivilegeEscalation
status: Available
queryPeriod: 1h
queryFrequency: 1h
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: true
    matchingMethod: Selected
    reopenClosedIncident: false
    lookbackDuration: 1h
    groupByEntities:
    - Account
requiredDataConnectors:
- connectorId: VaikoraSentinel
  dataTypes:
  - Vaikora_AgentSignals_CL
severity: High
relevantTechniques:
- T1059
- T1078
- T1548
name: Vaikora - High severity AI agent action detected
version: 1.0.0
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vaikora-Sentinel/Analytic%20Rules/Vaikora%20-%20High%20Risk%20AI%20Agent%20Action.yaml
eventGroupingSettings:
  aggregationKind: AlertPerResult
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.
triggerOperator: GreaterThan
suppressionDuration: 1h
id: 15c49777-7cb7-4746-8064-6fa4c7a73df8
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AgentId
    identifier: Name
triggerThreshold: 0
suppressionEnabled: false
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, ", ")

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/15c49777-7cb7-4746-8064-6fa4c7a73df8')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/15c49777-7cb7-4746-8064-6fa4c7a73df8')]",
      "properties": {
        "alertRuleTemplateName": "15c49777-7cb7-4746-8064-6fa4c7a73df8",
        "customDetails": {
          "ActionCount": "ActionCount",
          "Actions": "ActionList",
          "MaxAnomalyScore": "MaxAnomalyScore",
          "PolicyDecisions": "PolicyList",
          "ResourceTypes": "ResourceList"
        },
        "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.\n",
        "displayName": "Vaikora - High severity AI agent action detected",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AgentId",
                "identifier": "Name"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "groupByEntities": [
              "Account"
            ],
            "lookbackDuration": "PT1H",
            "matchingMethod": "Selected",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vaikora-Sentinel/Analytic%20Rules/Vaikora%20-%20High%20Risk%20AI%20Agent%20Action.yaml",
        "query": "Vaikora_AgentSignals_CL\n| where TimeGenerated > ago(1h)\n| where severity_s in (\"high\", \"critical\")\n| summarize\n    ActionCount = count(),\n    MaxAnomalyScore = max(anomaly_score_d),\n    Actions = make_set(action_type_s),\n    PolicyDecisions = make_set(policy_decision_s),\n    ResourceTypes = make_set(resource_type_s),\n    LogHashes = make_set(log_hash_s)\n  by AgentId = agent_id_s, Severity = severity_s\n| extend\n    ActionList = strcat_array(Actions, \", \"),\n    PolicyList = strcat_array(PolicyDecisions, \", \"),\n    ResourceList = strcat_array(ResourceTypes, \", \")\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Execution",
          "Impact",
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1059",
          "T1078",
          "T1548"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}