Malware in the recycle bin (Normalized Process Events)

let procList = dynamic(["cmd.exe","ftp.exe","schtasks.exe","powershell.exe","rundll32.exe","regsvr32.exe","msiexec.exe"]);  
imProcessCreate
| where CommandLine has "recycler"
| where Process has_any (procList)
| extend FileName = tostring(split(Process, '\\')[-1])
| where FileName in~ (procList)
| project StartTimeUtc = TimeGenerated, Dvc, User, Process, FileName, CommandLine, ActingProcessName, EventVendor, EventProduct
| extend timestamp = StartTimeUtc, AccountCustomEntity = User, HostCustomEntity = Dvc

metadata:
  author:
    name: Yuval Naor
  support:
    tier: Community
  source:
    kind: Community
  categories:
    domains:
    - Security - Threat Protection
severity: Medium
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/imProcess_malware_in_recyclebin.yaml
description: |
  'Identifies malware that has been hidden in the recycle bin.
  To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimProcessEvent)'  
tags:
- Id: b8266f81-2715-41a6-9062-42486cbc9c73
  version: 1.0.0
- SchemaVersion: 0.1.0
  Schema: ASIMProcessEvent
triggerOperator: gt
queryPeriod: 1d
requiredDataConnectors: []
queryFrequency: 1d
triggerThreshold: 0
tactics:
- DefenseEvasion
query: |
  let procList = dynamic(["cmd.exe","ftp.exe","schtasks.exe","powershell.exe","rundll32.exe","regsvr32.exe","msiexec.exe"]);  
  imProcessCreate
  | where CommandLine has "recycler"
  | where Process has_any (procList)
  | extend FileName = tostring(split(Process, '\\')[-1])
  | where FileName in~ (procList)
  | project StartTimeUtc = TimeGenerated, Dvc, User, Process, FileName, CommandLine, ActingProcessName, EventVendor, EventProduct
  | extend timestamp = StartTimeUtc, AccountCustomEntity = User, HostCustomEntity = Dvc  
kind: Scheduled
relevantTechniques:
- T1564
version: 1.2.3
id: 61988db3-0565-49b5-b8e3-747195baac6e
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: FullName
  entityType: Account
- fieldMappings:
  - columnName: HostCustomEntity
    identifier: FullName
  entityType: Host
name: Malware in the recycle bin (Normalized Process Events)

{
  "$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/61988db3-0565-49b5-b8e3-747195baac6e')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/61988db3-0565-49b5-b8e3-747195baac6e')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "Malware in the recycle bin (Normalized Process Events)",
        "description": "'Identifies malware that has been hidden in the recycle bin.\nTo use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimProcessEvent)'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "let procList = dynamic([\"cmd.exe\",\"ftp.exe\",\"schtasks.exe\",\"powershell.exe\",\"rundll32.exe\",\"regsvr32.exe\",\"msiexec.exe\"]);  \nimProcessCreate\n| where CommandLine has \"recycler\"\n| where Process has_any (procList)\n| extend FileName = tostring(split(Process, '\\\\')[-1])\n| where FileName in~ (procList)\n| project StartTimeUtc = TimeGenerated, Dvc, User, Process, FileName, CommandLine, ActingProcessName, EventVendor, EventProduct\n| extend timestamp = StartTimeUtc, AccountCustomEntity = User, HostCustomEntity = Dvc\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion"
        ],
        "techniques": [
          "T1564"
        ],
        "alertRuleTemplateName": "61988db3-0565-49b5-b8e3-747195baac6e",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "HostCustomEntity",
                "identifier": "FullName"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/imProcess_malware_in_recyclebin.yaml",
        "tags": [
          {
            "Id": "b8266f81-2715-41a6-9062-42486cbc9c73",
            "version": "1.0.0"
          },
          {
            "Schema": "ASIMProcessEvent",
            "SchemaVersion": "0.1.0"
          }
        ],
        "templateVersion": "1.2.3"
      }
    }
  ]
}