TrendMicroCAS
| where EventType =~ 'ransomware'
| summarize count() by DstUserName, bin(TimeGenerated, 2m)
| where count_ >= 2
| extend AccountCustomEntity = DstUserName
name: Trend Micro CAS - Ransomware outbreak
version: 1.0.1
severity: High
queryFrequency: 10m
triggerOperator: gt
relevantTechniques:
- T1486
status: Available
description: |
'Triggeres when ransomware was detected on several accounts.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Trend Micro Cloud App Security/Analytic Rules/TrendMicroCASRansomwareOutbreak.yaml
requiredDataConnectors:
- connectorId: TrendMicroCAS
dataTypes:
- TrendMicroCAS
entityMappings:
- fieldMappings:
- identifier: Name
columnName: AccountCustomEntity
entityType: Account
tactics:
- Impact
queryPeriod: 10m
query: |
TrendMicroCAS
| where EventType =~ 'ransomware'
| summarize count() by DstUserName, bin(TimeGenerated, 2m)
| where count_ >= 2
| extend AccountCustomEntity = DstUserName
kind: Scheduled
triggerThreshold: 0
id: 38e043ce-a1fd-497b-8d4f-ce5ca2db90cd
{
"$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/38e043ce-a1fd-497b-8d4f-ce5ca2db90cd')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/38e043ce-a1fd-497b-8d4f-ce5ca2db90cd')]",
"properties": {
"alertRuleTemplateName": "38e043ce-a1fd-497b-8d4f-ce5ca2db90cd",
"customDetails": null,
"description": "'Triggeres when ransomware was detected on several accounts.'\n",
"displayName": "Trend Micro CAS - Ransomware outbreak",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "Name"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Trend Micro Cloud App Security/Analytic Rules/TrendMicroCASRansomwareOutbreak.yaml",
"query": "TrendMicroCAS\n| where EventType =~ 'ransomware'\n| summarize count() by DstUserName, bin(TimeGenerated, 2m)\n| where count_ >= 2\n| extend AccountCustomEntity = DstUserName\n",
"queryFrequency": "PT10M",
"queryPeriod": "PT10M",
"severity": "High",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Impact"
],
"techniques": [
"T1486"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}