CiscoWSAEvent
| where isnotempty(AmpFileName)
| where isnotempty(ThreatName)
| summarize count() by SrcIpAddr, SrcUserName, bin(TimeGenerated, 15m)
| where count_ > 1
| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = SrcUserName
severity: High
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAMultipleInfectedFiles.yaml
description: |
'Detects multiple infected files on same source.'
triggerOperator: gt
queryPeriod: 1h
requiredDataConnectors:
- dataTypes:
- CiscoWSAEvent
connectorId: CiscoWSA
queryFrequency: 1h
triggerThreshold: 0
tactics:
- InitialAccess
query: |
CiscoWSAEvent
| where isnotempty(AmpFileName)
| where isnotempty(ThreatName)
| summarize count() by SrcIpAddr, SrcUserName, bin(TimeGenerated, 15m)
| where count_ > 1
| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = SrcUserName
status: Available
kind: Scheduled
relevantTechniques:
- T1189
version: 1.0.1
id: 93186e3d-5dc2-4a00-a993-fa1448db8734
entityMappings:
- fieldMappings:
- columnName: IPCustomEntity
identifier: Address
entityType: IP
- fieldMappings:
- columnName: AccountCustomEntity
identifier: Name
entityType: Account
name: Cisco WSA - Multiple infected files
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/93186e3d-5dc2-4a00-a993-fa1448db8734')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/93186e3d-5dc2-4a00-a993-fa1448db8734')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01-preview",
"properties": {
"displayName": "Cisco WSA - Multiple infected files",
"description": "'Detects multiple infected files on same source.'\n",
"severity": "High",
"enabled": true,
"query": "CiscoWSAEvent\n| where isnotempty(AmpFileName)\n| where isnotempty(ThreatName)\n| summarize count() by SrcIpAddr, SrcUserName, bin(TimeGenerated, 15m)\n| where count_ > 1\n| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = SrcUserName\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1189"
],
"alertRuleTemplateName": "93186e3d-5dc2-4a00-a993-fa1448db8734",
"customDetails": null,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "Name"
}
]
}
],
"status": "Available",
"templateVersion": "1.0.1",
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAMultipleInfectedFiles.yaml"
}
}
]
}