TI map URL entity to PaloAlto data
Id | 106813db-679e-4382-a51b-1bfc463befc3 |
Rulename | TI map URL entity to PaloAlto data |
Description | Identifies a match in PaloAlto data from any URL IOC from TI |
Severity | Medium |
Tactics | Impact |
Required data connectors | PaloAltoNetworks ThreatIntelligence ThreatIntelligenceTaxii |
Kind | Scheduled |
Query frequency | 1h |
Query period | 14d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/URLEntity_PaloAlto.yaml |
Version | 1.2.1 |
Arm template | 106813db-679e-4382-a51b-1bfc463befc3.json |
let dt_lookBack = 1h;
let ioc_lookBack = 14d;
ThreatIntelligenceIndicator
| where TimeGenerated >= ago(ioc_lookBack) and ExpirationDateTime > now()
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true
// Picking up only IOC's that contain the entities we want
| where isnotempty(Url)
// using innerunique to keep perf fast and result set low, we only need one match to indicate potential malicious activity that needs to be investigated
| join kind=innerunique (
CommonSecurityLog
| extend IngestionTime = ingestion_time()
| where IngestionTime > ago(dt_lookBack)
// Select on Palo Alto logs
| where DeviceVendor =~ "Palo Alto Networks"
| where DeviceEventClassID =~ 'url'
//Uncomment the line below to only alert on allowed connections
//| where DeviceAction !~ "block-url"
//Select logs where URL data is populated
| extend PA_Url = columnifexists("RequestURL", "None")
| extend PA_Url = iif(isempty(PA_Url), extract("([^\"]+)", 1, tolower(AdditionalExtensions)), trim('"', PA_Url))
| extend PA_Url = iif(PA_Url !startswith "http://" and ApplicationProtocol !~ "ssl", strcat('http://', PA_Url), iif(PA_Url !startswith "https://" and ApplicationProtocol =~ "ssl", strcat('https://', PA_Url), PA_Url))
| where isnotempty(PA_Url)
| extend CommonSecurityLog_TimeGenerated = TimeGenerated
) on $left.Url == $right.PA_Url
| where CommonSecurityLog_TimeGenerated < ExpirationDateTime
| summarize CommonSecurityLog_TimeGenerated = arg_max(CommonSecurityLog_TimeGenerated, *) by IndicatorId, PA_Url
| project CommonSecurityLog_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, DeviceAction, SourceIP, PA_Url, DeviceName
| extend timestamp = CommonSecurityLog_TimeGenerated, IPCustomEntity = SourceIP, HostCustomEntity = DeviceName, URLCustomEntity = PA_Url
version: 1.2.1
queryFrequency: 1h
requiredDataConnectors:
- connectorId: PaloAltoNetworks
dataTypes:
- CommonSecurityLog
- connectorId: ThreatIntelligence
dataTypes:
- ThreatIntelligenceIndicator
- connectorId: ThreatIntelligenceTaxii
dataTypes:
- ThreatIntelligenceIndicator
entityMappings:
- fieldMappings:
- columnName: HostCustomEntity
identifier: FullName
entityType: Host
- fieldMappings:
- columnName: IPCustomEntity
identifier: Address
entityType: IP
- fieldMappings:
- columnName: URLCustomEntity
identifier: Url
entityType: URL
kind: Scheduled
queryPeriod: 14d
severity: Medium
query: |
let dt_lookBack = 1h;
let ioc_lookBack = 14d;
ThreatIntelligenceIndicator
| where TimeGenerated >= ago(ioc_lookBack) and ExpirationDateTime > now()
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true
// Picking up only IOC's that contain the entities we want
| where isnotempty(Url)
// using innerunique to keep perf fast and result set low, we only need one match to indicate potential malicious activity that needs to be investigated
| join kind=innerunique (
CommonSecurityLog
| extend IngestionTime = ingestion_time()
| where IngestionTime > ago(dt_lookBack)
// Select on Palo Alto logs
| where DeviceVendor =~ "Palo Alto Networks"
| where DeviceEventClassID =~ 'url'
//Uncomment the line below to only alert on allowed connections
//| where DeviceAction !~ "block-url"
//Select logs where URL data is populated
| extend PA_Url = columnifexists("RequestURL", "None")
| extend PA_Url = iif(isempty(PA_Url), extract("([^\"]+)", 1, tolower(AdditionalExtensions)), trim('"', PA_Url))
| extend PA_Url = iif(PA_Url !startswith "http://" and ApplicationProtocol !~ "ssl", strcat('http://', PA_Url), iif(PA_Url !startswith "https://" and ApplicationProtocol =~ "ssl", strcat('https://', PA_Url), PA_Url))
| where isnotempty(PA_Url)
| extend CommonSecurityLog_TimeGenerated = TimeGenerated
) on $left.Url == $right.PA_Url
| where CommonSecurityLog_TimeGenerated < ExpirationDateTime
| summarize CommonSecurityLog_TimeGenerated = arg_max(CommonSecurityLog_TimeGenerated, *) by IndicatorId, PA_Url
| project CommonSecurityLog_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, DeviceAction, SourceIP, PA_Url, DeviceName
| extend timestamp = CommonSecurityLog_TimeGenerated, IPCustomEntity = SourceIP, HostCustomEntity = DeviceName, URLCustomEntity = PA_Url
triggerOperator: gt
id: 106813db-679e-4382-a51b-1bfc463befc3
description: |
'Identifies a match in PaloAlto data from any URL IOC from TI'
triggerThreshold: 0
name: TI map URL entity to PaloAlto data
tactics:
- Impact
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/URLEntity_PaloAlto.yaml
{
"$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/106813db-679e-4382-a51b-1bfc463befc3')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/106813db-679e-4382-a51b-1bfc463befc3')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "TI map URL entity to PaloAlto data",
"description": "'Identifies a match in PaloAlto data from any URL IOC from TI'\n",
"severity": "Medium",
"enabled": true,
"query": "let dt_lookBack = 1h;\nlet ioc_lookBack = 14d;\nThreatIntelligenceIndicator\n| where TimeGenerated >= ago(ioc_lookBack) and ExpirationDateTime > now()\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId\n| where Active == true\n// Picking up only IOC's that contain the entities we want\n| where isnotempty(Url)\n// using innerunique to keep perf fast and result set low, we only need one match to indicate potential malicious activity that needs to be investigated\n| join kind=innerunique (\n CommonSecurityLog\n | extend IngestionTime = ingestion_time()\n | where IngestionTime > ago(dt_lookBack)\n // Select on Palo Alto logs\n | where DeviceVendor =~ \"Palo Alto Networks\"\n | where DeviceEventClassID =~ 'url'\n //Uncomment the line below to only alert on allowed connections\n //| where DeviceAction !~ \"block-url\"\n //Select logs where URL data is populated\n | extend PA_Url = columnifexists(\"RequestURL\", \"None\")\n | extend PA_Url = iif(isempty(PA_Url), extract(\"([^\\\"]+)\", 1, tolower(AdditionalExtensions)), trim('\"', PA_Url))\n | extend PA_Url = iif(PA_Url !startswith \"http://\" and ApplicationProtocol !~ \"ssl\", strcat('http://', PA_Url), iif(PA_Url !startswith \"https://\" and ApplicationProtocol =~ \"ssl\", strcat('https://', PA_Url), PA_Url))\n | where isnotempty(PA_Url)\n | extend CommonSecurityLog_TimeGenerated = TimeGenerated\n) on $left.Url == $right.PA_Url\n| where CommonSecurityLog_TimeGenerated < ExpirationDateTime\n| summarize CommonSecurityLog_TimeGenerated = arg_max(CommonSecurityLog_TimeGenerated, *) by IndicatorId, PA_Url\n| project CommonSecurityLog_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, DeviceAction, SourceIP, PA_Url, DeviceName\n| extend timestamp = CommonSecurityLog_TimeGenerated, IPCustomEntity = SourceIP, HostCustomEntity = DeviceName, URLCustomEntity = PA_Url\n",
"queryFrequency": "PT1H",
"queryPeriod": "P14D",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Impact"
],
"alertRuleTemplateName": "106813db-679e-4382-a51b-1bfc463befc3",
"customDetails": null,
"entityMappings": [
{
"entityType": "Host",
"fieldMappings": [
{
"identifier": "FullName",
"columnName": "HostCustomEntity"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"identifier": "Address",
"columnName": "IPCustomEntity"
}
]
},
{
"entityType": "URL",
"fieldMappings": [
{
"identifier": "Url",
"columnName": "URLCustomEntity"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/URLEntity_PaloAlto.yaml",
"templateVersion": "1.2.1"
}
}
]
}