Execution of software vulnerable to webp buffer overflow of CVE-2023-4863

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Id	26e81021-2de6-4442-a74a-a77885e96911
Rulename	Execution of software vulnerable to webp buffer overflow of CVE-2023-4863
Description	This query looks at device, process, and network events from Defender for Endpoint that may be vulnerable to buffer overflow defined in CVE-2023-4863. Results are not an indicator of malicious activity.
Severity	Informational
Tactics	Execution
Techniques	T1203
Required data connectors	MicrosoftThreatProtection
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/PossibleWebpBufferOverflow.yaml
Version	1.1.1
Arm template	26e81021-2de6-4442-a74a-a77885e96911.json

KQL

//CVE-2023-4863 Process activity with .webp files on devices where CVE-2023-4863 is unpatched
//This query shows all process activity with .webp files on vulnerable machines and is not an indicator of malicious activity
let VulnDevices = DeviceTvmSoftwareVulnerabilities
    | where CveId == "CVE-2023-4863"
    | distinct DeviceId;
union DeviceProcessEvents, DeviceNetworkEvents, DeviceEvents
| where DeviceId in (VulnDevices) and InitiatingProcessCommandLine has(".webp") or ProcessCommandLine has(".webp")
| extend Name = tostring(split(AccountUpn, "@")[0]), UPNSuffix = tostring(split(AccountUpn, "@")[1])
| extend HostName = tostring(split(DeviceName, ".")[0]), DomainIndex = toint(indexof(DeviceName, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(DeviceName, DomainIndex + 1), DeviceName)

YAML

relevantTechniques:
- T1203
incidentConfiguration:
  createIncident: false
  groupingConfiguration:
    lookbackDuration: PT5H
    groupByCustomDetails: []
    groupByAlertDetails: []
    enabled: false
    reopenClosedIncident: false
    matchingMethod: Selected
    groupByEntities:
    - Account
name: Execution of software vulnerable to webp buffer overflow of CVE-2023-4863
requiredDataConnectors:
- dataTypes:
  - DeviceProcessEvents
  - DeviceNetworkEvents
  - DeviceEvents
  - DeviceTvmSoftwareVulnerabilities
  connectorId: MicrosoftThreatProtection
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: DeviceName
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: HostNameDomain
  entityType: Host
- fieldMappings:
  - identifier: FullName
    columnName: AccountUpn
  - identifier: Name
    columnName: Name
  - identifier: UPNSuffix
    columnName: UPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: LocalIP
  entityType: IP
- fieldMappings:
  - identifier: ProcessId
    columnName: ProcessId
  entityType: Process
- fieldMappings:
  - identifier: ProcessId
    columnName: InitiatingProcessId
  entityType: Process
- fieldMappings:
  - identifier: CommandLine
    columnName: ProcessCommandLine
  entityType: Process
triggerThreshold: 0
id: 26e81021-2de6-4442-a74a-a77885e96911
tactics:
- Execution
version: 1.1.1
alertDetailsOverride:
  alertDynamicProperties: []
  alertDisplayNameFormat: Possible exploitation of CVE-2023-4863
queryPeriod: 1h
kind: Scheduled
tags:
- CVE-2023-4863
eventGroupingSettings:
  aggregationKind: SingleAlert
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/PossibleWebpBufferOverflow.yaml
suppressionDuration: PT5H
queryFrequency: 1h
severity: Informational
status: Available
suppressionEnabled: false
description: |
    'This query looks at device, process, and network events from Defender for Endpoint that may be vulnerable to buffer overflow defined in CVE-2023-4863. Results are not an indicator of malicious activity.'
query: |-
  //CVE-2023-4863 Process activity with .webp files on devices where CVE-2023-4863 is unpatched
  //This query shows all process activity with .webp files on vulnerable machines and is not an indicator of malicious activity
  let VulnDevices = DeviceTvmSoftwareVulnerabilities
      | where CveId == "CVE-2023-4863"
      | distinct DeviceId;
  union DeviceProcessEvents, DeviceNetworkEvents, DeviceEvents
  | where DeviceId in (VulnDevices) and InitiatingProcessCommandLine has(".webp") or ProcessCommandLine has(".webp")
  | extend Name = tostring(split(AccountUpn, "@")[0]), UPNSuffix = tostring(split(AccountUpn, "@")[1])
  | extend HostName = tostring(split(DeviceName, ".")[0]), DomainIndex = toint(indexof(DeviceName, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(DeviceName, DomainIndex + 1), DeviceName)  
triggerOperator: gt

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/26e81021-2de6-4442-a74a-a77885e96911')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/26e81021-2de6-4442-a74a-a77885e96911')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDisplayNameFormat": "Possible exploitation of CVE-2023-4863",
          "alertDynamicProperties": []
        },
        "alertRuleTemplateName": "26e81021-2de6-4442-a74a-a77885e96911",
        "customDetails": null,
        "description": "'This query looks at device, process, and network events from Defender for Endpoint that may be vulnerable to buffer overflow defined in CVE-2023-4863. Results are not an indicator of malicious activity.'\n",
        "displayName": "Execution of software vulnerable to webp buffer overflow of CVE-2023-4863",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DeviceName",
                "identifier": "FullName"
              },
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "HostNameDomain",
                "identifier": "DnsDomain"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountUpn",
                "identifier": "FullName"
              },
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "LocalIP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "Process",
            "fieldMappings": [
              {
                "columnName": "ProcessId",
                "identifier": "ProcessId"
              }
            ]
          },
          {
            "entityType": "Process",
            "fieldMappings": [
              {
                "columnName": "InitiatingProcessId",
                "identifier": "ProcessId"
              }
            ]
          },
          {
            "entityType": "Process",
            "fieldMappings": [
              {
                "columnName": "ProcessCommandLine",
                "identifier": "CommandLine"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "incidentConfiguration": {
          "createIncident": false,
          "groupingConfiguration": {
            "enabled": false,
            "groupByAlertDetails": [],
            "groupByCustomDetails": [],
            "groupByEntities": [
              "Account"
            ],
            "lookbackDuration": "PT5H",
            "matchingMethod": "Selected",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/PossibleWebpBufferOverflow.yaml",
        "query": "//CVE-2023-4863 Process activity with .webp files on devices where CVE-2023-4863 is unpatched\n//This query shows all process activity with .webp files on vulnerable machines and is not an indicator of malicious activity\nlet VulnDevices = DeviceTvmSoftwareVulnerabilities\n    | where CveId == \"CVE-2023-4863\"\n    | distinct DeviceId;\nunion DeviceProcessEvents, DeviceNetworkEvents, DeviceEvents\n| where DeviceId in (VulnDevices) and InitiatingProcessCommandLine has(\".webp\") or ProcessCommandLine has(\".webp\")\n| extend Name = tostring(split(AccountUpn, \"@\")[0]), UPNSuffix = tostring(split(AccountUpn, \"@\")[1])\n| extend HostName = tostring(split(DeviceName, \".\")[0]), DomainIndex = toint(indexof(DeviceName, '.'))\n| extend HostNameDomain = iff(DomainIndex != -1, substring(DeviceName, DomainIndex + 1), DeviceName)",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Informational",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT5H",
        "suppressionEnabled": false,
        "tactics": [
          "Execution"
        ],
        "tags": [
          "CVE-2023-4863"
        ],
        "techniques": [
          "T1203"
        ],
        "templateVersion": "1.1.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}