Vaikora - High severity AI agent action detected

Back


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

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

ARM