Palo Alto Threat signatures from Unusual IP addresses

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Id	89a86f70-615f-4a79-9621-6f68c50f365f
Rulename	Palo Alto Threat signatures from Unusual IP addresses
Description	Identifies Palo Alto Threat signatures from unusual IP addresses which are not historically seen. This detection is also leveraged and required for MDE and PAN Fusion scenario https://docs.microsoft.com/Azure/sentinel/fusion-scenario-reference#network-request-to-tor-anonymization-service-followed-by-anomalous-traffic-flagged-by-palo-alto-networks-firewall
Severity	Medium
Tactics	Discovery Exfiltration CommandAndControl
Techniques	T1046 T1030 T1071.001
Required data connectors	CefAma
Kind	Scheduled
Query frequency	1h
Query period	7d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAlto-PAN-OS/Analytic Rules/PaloAlto-UnusualThreatSignatures.yaml
Version	1.0.3
Arm template	89a86f70-615f-4a79-9621-6f68c50f365f.json

KQL

let starttime = 7d;
let endtime = 1d;
let timeframe = 1h;
let HistThreshold = 25; 
let CurrThreshold = 10; 
let HistoricalThreats = CommonSecurityLog
| where isnotempty(SourceIP)
| where TimeGenerated between (startofday(ago(starttime))..startofday(ago(endtime)))
| where DeviceVendor =~ "Palo Alto Networks"
| where Activity =~ "THREAT" and SimplifiedDeviceAction =~ "alert" 
| where DeviceEventClassID in ('spyware', 'scan', 'file', 'vulnerability', 'flood', 'packet', 'virus','wildfire', 'wildfire-virus')
| summarize TotalEvents = count(), ThreatTypes = make_set(DeviceEventClassID), DestinationIpList = make_set(DestinationIP), FirstSeen = min(TimeGenerated) , LastSeen = max(TimeGenerated) by SourceIP, DeviceAction, DeviceVendor;
let CurrentHourThreats =  CommonSecurityLog
| where isnotempty(SourceIP)
| where TimeGenerated > ago(timeframe)
| where DeviceVendor =~ "Palo Alto Networks"
| where Activity =~ "THREAT" and SimplifiedDeviceAction =~ "alert" 
| where DeviceEventClassID in ('spyware', 'scan', 'file', 'vulnerability', 'flood', 'packet', 'virus','wildfire', 'wildfire-virus')
| summarize TotalEvents = count(), ThreatTypes = make_set(DeviceEventClassID), DestinationIpList = make_set(DestinationIP), FirstSeen = min(TimeGenerated) , LastSeen = max(TimeGenerated) by SourceIP, DeviceAction, DeviceProduct, DeviceVendor;
CurrentHourThreats 
| where TotalEvents < CurrThreshold
| join kind = leftanti (HistoricalThreats 
| where TotalEvents > HistThreshold) on SourceIP

YAML

id: 89a86f70-615f-4a79-9621-6f68c50f365f
tactics:
- Discovery
- Exfiltration
- CommandAndControl
queryPeriod: 7d
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAlto-PAN-OS/Analytic Rules/PaloAlto-UnusualThreatSignatures.yaml
triggerThreshold: 0
name: Palo Alto Threat signatures from Unusual IP addresses
query: |
  let starttime = 7d;
  let endtime = 1d;
  let timeframe = 1h;
  let HistThreshold = 25; 
  let CurrThreshold = 10; 
  let HistoricalThreats = CommonSecurityLog
  | where isnotempty(SourceIP)
  | where TimeGenerated between (startofday(ago(starttime))..startofday(ago(endtime)))
  | where DeviceVendor =~ "Palo Alto Networks"
  | where Activity =~ "THREAT" and SimplifiedDeviceAction =~ "alert" 
  | where DeviceEventClassID in ('spyware', 'scan', 'file', 'vulnerability', 'flood', 'packet', 'virus','wildfire', 'wildfire-virus')
  | summarize TotalEvents = count(), ThreatTypes = make_set(DeviceEventClassID), DestinationIpList = make_set(DestinationIP), FirstSeen = min(TimeGenerated) , LastSeen = max(TimeGenerated) by SourceIP, DeviceAction, DeviceVendor;
  let CurrentHourThreats =  CommonSecurityLog
  | where isnotempty(SourceIP)
  | where TimeGenerated > ago(timeframe)
  | where DeviceVendor =~ "Palo Alto Networks"
  | where Activity =~ "THREAT" and SimplifiedDeviceAction =~ "alert" 
  | where DeviceEventClassID in ('spyware', 'scan', 'file', 'vulnerability', 'flood', 'packet', 'virus','wildfire', 'wildfire-virus')
  | summarize TotalEvents = count(), ThreatTypes = make_set(DeviceEventClassID), DestinationIpList = make_set(DestinationIP), FirstSeen = min(TimeGenerated) , LastSeen = max(TimeGenerated) by SourceIP, DeviceAction, DeviceProduct, DeviceVendor;
  CurrentHourThreats 
  | where TotalEvents < CurrThreshold
  | join kind = leftanti (HistoricalThreats 
  | where TotalEvents > HistThreshold) on SourceIP  
severity: Medium
triggerOperator: gt
kind: Scheduled
relevantTechniques:
- T1046
- T1030
- T1071.001
tags:
- Fusion
queryFrequency: 1h
requiredDataConnectors:
- connectorId: CefAma
  dataTypes:
  - CommonSecurityLog
description: |
  'Identifies Palo Alto Threat signatures from unusual IP addresses which are not historically seen. 
  This detection is also leveraged and required for MDE and PAN Fusion scenario
  https://docs.microsoft.com/Azure/sentinel/fusion-scenario-reference#network-request-to-tor-anonymization-service-followed-by-anomalous-traffic-flagged-by-palo-alto-networks-firewall'  
status: Available
version: 1.0.3
entityMappings:
- fieldMappings:
  - columnName: SourceIP
    identifier: Address
  entityType: IP

ARM

{
  "$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/89a86f70-615f-4a79-9621-6f68c50f365f')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/89a86f70-615f-4a79-9621-6f68c50f365f')]",
      "properties": {
        "alertRuleTemplateName": "89a86f70-615f-4a79-9621-6f68c50f365f",
        "customDetails": null,
        "description": "'Identifies Palo Alto Threat signatures from unusual IP addresses which are not historically seen. \nThis detection is also leveraged and required for MDE and PAN Fusion scenario\nhttps://docs.microsoft.com/Azure/sentinel/fusion-scenario-reference#network-request-to-tor-anonymization-service-followed-by-anomalous-traffic-flagged-by-palo-alto-networks-firewall'\n",
        "displayName": "Palo Alto Threat signatures from Unusual IP addresses",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIP",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAlto-PAN-OS/Analytic Rules/PaloAlto-UnusualThreatSignatures.yaml",
        "query": "let starttime = 7d;\nlet endtime = 1d;\nlet timeframe = 1h;\nlet HistThreshold = 25; \nlet CurrThreshold = 10; \nlet HistoricalThreats = CommonSecurityLog\n| where isnotempty(SourceIP)\n| where TimeGenerated between (startofday(ago(starttime))..startofday(ago(endtime)))\n| where DeviceVendor =~ \"Palo Alto Networks\"\n| where Activity =~ \"THREAT\" and SimplifiedDeviceAction =~ \"alert\" \n| where DeviceEventClassID in ('spyware', 'scan', 'file', 'vulnerability', 'flood', 'packet', 'virus','wildfire', 'wildfire-virus')\n| summarize TotalEvents = count(), ThreatTypes = make_set(DeviceEventClassID), DestinationIpList = make_set(DestinationIP), FirstSeen = min(TimeGenerated) , LastSeen = max(TimeGenerated) by SourceIP, DeviceAction, DeviceVendor;\nlet CurrentHourThreats =  CommonSecurityLog\n| where isnotempty(SourceIP)\n| where TimeGenerated > ago(timeframe)\n| where DeviceVendor =~ \"Palo Alto Networks\"\n| where Activity =~ \"THREAT\" and SimplifiedDeviceAction =~ \"alert\" \n| where DeviceEventClassID in ('spyware', 'scan', 'file', 'vulnerability', 'flood', 'packet', 'virus','wildfire', 'wildfire-virus')\n| summarize TotalEvents = count(), ThreatTypes = make_set(DeviceEventClassID), DestinationIpList = make_set(DestinationIP), FirstSeen = min(TimeGenerated) , LastSeen = max(TimeGenerated) by SourceIP, DeviceAction, DeviceProduct, DeviceVendor;\nCurrentHourThreats \n| where TotalEvents < CurrThreshold\n| join kind = leftanti (HistoricalThreats \n| where TotalEvents > HistThreshold) on SourceIP\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P7D",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [
          "T1071.001"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl",
          "Discovery",
          "Exfiltration"
        ],
        "tags": [
          "Fusion"
        ],
        "techniques": [
          "T1030",
          "T1046",
          "T1071"
        ],
        "templateVersion": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}