Microsoft Sentinel Analytic Rules
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Suspicious Process Injection from Office application

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Ida4d8e681-6f30-440a-a2f3-c312bc1389d0
RulenameSuspicious Process Injection from Office application
DescriptionThis query detects process injections using CreateRemoteThread, QueueUserAPC or SetThread context APIs, originating from an Office process (only Word/Excel/PowerPoint)that might contains macros. Performing process injection from a macro is a common technique by attackers to escape out of the Office process into something longer running.
SeverityMedium
TacticsExecution
TechniquesT1204
Required data connectorsMicrosoftThreatProtection
KindScheduled
Query frequency1h
Query period1h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/FalconFriday/Analytic Rules/OfficeProcessInjection.yaml
Version1.0.1
Arm templatea4d8e681-6f30-440a-a2f3-c312bc1389d0.json
Deploy To Azure
DeviceEvents 
| where ActionType in ("CreateRemoteThreadApiCall", "QueueUserApcRemoteApiCall", "SetThreadContextRemoteApiCall")
| where InitiatingProcessFileName in~ ("winword.exe", "excel.exe", "powerpnt.exe")
| where InitiatingProcessCommandLine !contains "/dde"
| where not(InitiatingProcessCommandLine has_any (".docx", "dotx",".xlsx", ".xltx", ".pptx")) // These files can't contain macros.
// Enable the line below if the results are too noisy.
//| where InitiatingProcessCommandLine has_any (".doc", ".wbk", ".docm", ".dot", ".dotm" ".xls", ".xlsm", ".xltm", ".xla",".xll", ".xlam", ".ppt", ".pptm", ".pot", ".potm", ".ppsm", ".sldm") 
entityMappings:
- fieldMappings:
  - columnName: InitiatingProcessAccountSid
    identifier: Sid
  - columnName: InitiatingProcessAccountName
    identifier: Name
  - columnName: InitiatingProcessAccountDomain
    identifier: NTDomain
  entityType: Account
- fieldMappings:
  - columnName: DeviceName
    identifier: FullName
  entityType: Host
- fieldMappings:
  - columnName: InitiatingProcessCommandLine
    identifier: CommandLine
  entityType: Process
triggerThreshold: 0
severity: Medium
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/FalconFriday/Analytic Rules/OfficeProcessInjection.yaml
queryFrequency: 1h
status: Available
relevantTechniques:
- T1204
triggerOperator: gt
id: a4d8e681-6f30-440a-a2f3-c312bc1389d0
requiredDataConnectors:
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - DeviceEvents
version: 1.0.1
name: Suspicious Process Injection from Office application
description: |
    This query detects process injections using CreateRemoteThread, QueueUserAPC or SetThread context APIs, originating from an Office process (only Word/Excel/PowerPoint)that might contains macros. Performing process injection from a macro is a common technique by attackers to escape out of the Office process into something longer running. 
query: |
  DeviceEvents 
  | where ActionType in ("CreateRemoteThreadApiCall", "QueueUserApcRemoteApiCall", "SetThreadContextRemoteApiCall")
  | where InitiatingProcessFileName in~ ("winword.exe", "excel.exe", "powerpnt.exe")
  | where InitiatingProcessCommandLine !contains "/dde"
  | where not(InitiatingProcessCommandLine has_any (".docx", "dotx",".xlsx", ".xltx", ".pptx")) // These files can't contain macros.
  // Enable the line below if the results are too noisy.
  //| where InitiatingProcessCommandLine has_any (".doc", ".wbk", ".docm", ".dot", ".dotm" ".xls", ".xlsm", ".xltm", ".xla",".xll", ".xlam", ".ppt", ".pptm", ".pot", ".potm", ".ppsm", ".sldm")   
tactics:
- Execution
queryPeriod: 1h
kind: Scheduled
{
  "$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/a4d8e681-6f30-440a-a2f3-c312bc1389d0')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a4d8e681-6f30-440a-a2f3-c312bc1389d0')]",
      "properties": {
        "alertRuleTemplateName": "a4d8e681-6f30-440a-a2f3-c312bc1389d0",
        "customDetails": null,
        "description": "This query detects process injections using CreateRemoteThread, QueueUserAPC or SetThread context APIs, originating from an Office process (only Word/Excel/PowerPoint)that might contains macros. Performing process injection from a macro is a common technique by attackers to escape out of the Office process into something longer running. \n",
        "displayName": "Suspicious Process Injection from Office application",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "InitiatingProcessAccountSid",
                "identifier": "Sid"
              },
              {
                "columnName": "InitiatingProcessAccountName",
                "identifier": "Name"
              },
              {
                "columnName": "InitiatingProcessAccountDomain",
                "identifier": "NTDomain"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DeviceName",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "Process",
            "fieldMappings": [
              {
                "columnName": "InitiatingProcessCommandLine",
                "identifier": "CommandLine"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/FalconFriday/Analytic Rules/OfficeProcessInjection.yaml",
        "query": "DeviceEvents \n| where ActionType in (\"CreateRemoteThreadApiCall\", \"QueueUserApcRemoteApiCall\", \"SetThreadContextRemoteApiCall\")\n| where InitiatingProcessFileName in~ (\"winword.exe\", \"excel.exe\", \"powerpnt.exe\")\n| where InitiatingProcessCommandLine !contains \"/dde\"\n| where not(InitiatingProcessCommandLine has_any (\".docx\", \"dotx\",\".xlsx\", \".xltx\", \".pptx\")) // These files can't contain macros.\n// Enable the line below if the results are too noisy.\n//| where InitiatingProcessCommandLine has_any (\".doc\", \".wbk\", \".docm\", \".dot\", \".dotm\" \".xls\", \".xlsm\", \".xltm\", \".xla\",\".xll\", \".xlam\", \".ppt\", \".pptm\", \".pot\", \".potm\", \".ppsm\", \".sldm\") \n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Execution"
        ],
        "techniques": [
          "T1204"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}