Process-Level Anomaly

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Id	3fa85f64-5717-4562-b3fc-2c963f66afa6
Rulename	Process-Level Anomaly
Description	Triggers an incident when the same process name appears in 50 or more alerts across multiple devices, suggesting widespread activity.
Severity	Medium
Tactics	Execution DefenseEvasion
Techniques	T1059 T1204
Required data connectors	MorphisecCCF
Kind	Scheduled
Query frequency	1d
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Morphisec/Analytic Rules/MorphisecProcessLevelAnomaly.yaml
Version	1.0.0
Arm template	3fa85f64-5717-4562-b3fc-2c963f66afa6.json

KQL

MorphisecAlerts_CL
| where threatMessageArrivalTime >= ago(24h)
| summarize 
    AlertCount = dcount(id),
    DeviceCount = dcount(hostname)
    by application
| where AlertCount >= 50 and DeviceCount > 1

YAML

suppressionEnabled: false
description: |
    'Triggers an incident when the same process name appears in 50 or more alerts across multiple devices, suggesting widespread activity.'
kind: Scheduled
tactics:
- Execution
- DefenseEvasion
requiredDataConnectors:
- connectorId: MorphisecCCF
  dataTypes:
  - Morphisec
incidentConfiguration:
  groupingConfiguration:
    reopenClosedIncident: false
    lookbackDuration: 5h
    enabled: false
    matchingMethod: AllEntities
  createIncident: true
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Morphisec/Analytic Rules/MorphisecProcessLevelAnomaly.yaml
severity: Medium
name: Process-Level Anomaly
suppressionDuration: 5h
customDetails:
  ProcessName: application
triggerThreshold: 0
queryPeriod: 1d
query: |
  MorphisecAlerts_CL
  | where threatMessageArrivalTime >= ago(24h)
  | summarize 
      AlertCount = dcount(id),
      DeviceCount = dcount(hostname)
      by application
  | where AlertCount >= 50 and DeviceCount > 1  
relevantTechniques:
- T1059
- T1204
id: 3fa85f64-5717-4562-b3fc-2c963f66afa6
queryFrequency: 1d
status: Available
version: 1.0.0
triggerOperator: gt
eventGroupingSettings:
  aggregationKind: SingleAlert

ARM