Dev-0270 Malicious Powershell usage

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Id	422ca2bf-598b-4872-82bb-5f7e8fa731e7
Rulename	Dev-0270 Malicious Powershell usage
Description	DEV-0270 heavily uses powershell to achieve their objective at various stages of their attack. To locate powershell related activity tied to the actor, Microsoft Sentinel customers can run the following query.
Severity	High
Tactics	Exfiltration DefenseEvasion
Techniques	T1048 T1562
Required data connectors	MicrosoftThreatProtection SecurityEvents WindowsSecurityEvents
Kind	Scheduled
Query frequency	6h
Query period	6h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Dev 0270 Detection and Hunting/Analytic Rules/Dev-0270PowershellSep2022.yaml
Version	1.0.4
Arm template	422ca2bf-598b-4872-82bb-5f7e8fa731e7.json

KQL

(union isfuzzy=true
(SecurityEvent
| where EventID==4688
| extend FileName=tostring(split(NewProcessName, @'\')[(-1)]),  ProcessCommandLine = CommandLine, InitiatingProcessFileName=ParentProcessName
| where (FileName =~ "powershell.exe" and ProcessCommandLine has_all("try", "Add-MpPreference", "-ExclusionPath", "ProgramData", "catch")) or (FileName =~ 'powershell.exe' and ProcessCommandLine has_all('Add-PSSnapin', 'Get-Recipient', '-ExpandProperty', 'EmailAddresses', 'SmtpAddress', '-hidetableheaders') )
| project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, InitiatingProcessFileName, EventID, Activity, CommandLine, EventSourceName, Type
),
(DeviceProcessEvents 
| where (FileName =~ "powershell.exe" and ((ProcessCommandLine has_all("try", "Add-MpPreference", "-ExclusionPath", "ProgramData", "catch"))  or (ProcessCommandLine has_all('Add-PSSnapin', 'Get-Recipient', '-ExpandProperty', 'EmailAddresses', 'SmtpAddress', '-hidetableheaders'))))
or ( InitiatingProcessFileName =~ 'powershell.exe' and (((InitiatingProcessCommandLine has_all('$file=', 'dllhost.exe', 'Invoke-WebRequest', '-OutFile')) or ((InitiatingProcessCommandLine has_all('$admins=', 'System.Security.Principal.SecurityIdentifier', 'Translate', '-split', 'localgroup', '/add', '$rdp='))))))
| extend Account = strcat(InitiatingProcessAccountDomain, @'\', InitiatingProcessAccountName),  Computer = DeviceName
)
)
| extend HostName = tostring(split(Computer, ".")[0]), DomainIndex = toint(indexof(Computer, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)
| extend AccountName = tostring(split(Account, @'\')[1]), AccountNTDomain = tostring(split(Account, @'\')[0])

YAML

requiredDataConnectors:
- dataTypes:
  - SecurityEvent
  connectorId: SecurityEvents
- dataTypes:
  - SecurityEvent
  connectorId: WindowsSecurityEvents
- dataTypes:
  - DeviceProcessEvents
  connectorId: MicrosoftThreatProtection
triggerThreshold: 0
relevantTechniques:
- T1048
- T1562
queryPeriod: 6h
version: 1.0.4
tags:
- Dev-0270
id: 422ca2bf-598b-4872-82bb-5f7e8fa731e7
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Dev 0270 Detection and Hunting/Analytic Rules/Dev-0270PowershellSep2022.yaml
query: |
  (union isfuzzy=true
  (SecurityEvent
  | where EventID==4688
  | extend FileName=tostring(split(NewProcessName, @'\')[(-1)]),  ProcessCommandLine = CommandLine, InitiatingProcessFileName=ParentProcessName
  | where (FileName =~ "powershell.exe" and ProcessCommandLine has_all("try", "Add-MpPreference", "-ExclusionPath", "ProgramData", "catch")) or (FileName =~ 'powershell.exe' and ProcessCommandLine has_all('Add-PSSnapin', 'Get-Recipient', '-ExpandProperty', 'EmailAddresses', 'SmtpAddress', '-hidetableheaders') )
  | project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, InitiatingProcessFileName, EventID, Activity, CommandLine, EventSourceName, Type
  ),
  (DeviceProcessEvents 
  | where (FileName =~ "powershell.exe" and ((ProcessCommandLine has_all("try", "Add-MpPreference", "-ExclusionPath", "ProgramData", "catch"))  or (ProcessCommandLine has_all('Add-PSSnapin', 'Get-Recipient', '-ExpandProperty', 'EmailAddresses', 'SmtpAddress', '-hidetableheaders'))))
  or ( InitiatingProcessFileName =~ 'powershell.exe' and (((InitiatingProcessCommandLine has_all('$file=', 'dllhost.exe', 'Invoke-WebRequest', '-OutFile')) or ((InitiatingProcessCommandLine has_all('$admins=', 'System.Security.Principal.SecurityIdentifier', 'Translate', '-split', 'localgroup', '/add', '$rdp='))))))
  | extend Account = strcat(InitiatingProcessAccountDomain, @'\', InitiatingProcessAccountName),  Computer = DeviceName
  )
  )
  | extend HostName = tostring(split(Computer, ".")[0]), DomainIndex = toint(indexof(Computer, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)
  | extend AccountName = tostring(split(Account, @'\')[1]), AccountNTDomain = tostring(split(Account, @'\')[0])  
status: Available
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: Account
  - identifier: Name
    columnName: AccountName
  - identifier: NTDomain
    columnName: AccountNTDomain
  entityType: Account
- fieldMappings:
  - identifier: FullName
    columnName: Computer
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: HostNameDomain
  entityType: Host
tactics:
- Exfiltration
- DefenseEvasion
severity: High
name: Dev-0270 Malicious Powershell usage
queryFrequency: 6h
triggerOperator: gt
kind: Scheduled
description: |
    'DEV-0270 heavily uses powershell to achieve their objective at various stages of their attack. To locate powershell related activity tied to the actor, Microsoft Sentinel customers can run the following query.'

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/422ca2bf-598b-4872-82bb-5f7e8fa731e7')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/422ca2bf-598b-4872-82bb-5f7e8fa731e7')]",
      "properties": {
        "alertRuleTemplateName": "422ca2bf-598b-4872-82bb-5f7e8fa731e7",
        "customDetails": null,
        "description": "'DEV-0270 heavily uses powershell to achieve their objective at various stages of their attack. To locate powershell related activity tied to the actor, Microsoft Sentinel customers can run the following query.'\n",
        "displayName": "Dev-0270 Malicious Powershell usage",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Account",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountNTDomain",
                "identifier": "NTDomain"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Computer",
                "identifier": "FullName"
              },
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "HostNameDomain",
                "identifier": "DnsDomain"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Dev 0270 Detection and Hunting/Analytic Rules/Dev-0270PowershellSep2022.yaml",
        "query": "(union isfuzzy=true\n(SecurityEvent\n| where EventID==4688\n| extend FileName=tostring(split(NewProcessName, @'\\')[(-1)]),  ProcessCommandLine = CommandLine, InitiatingProcessFileName=ParentProcessName\n| where (FileName =~ \"powershell.exe\" and ProcessCommandLine has_all(\"try\", \"Add-MpPreference\", \"-ExclusionPath\", \"ProgramData\", \"catch\")) or (FileName =~ 'powershell.exe' and ProcessCommandLine has_all('Add-PSSnapin', 'Get-Recipient', '-ExpandProperty', 'EmailAddresses', 'SmtpAddress', '-hidetableheaders') )\n| project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, InitiatingProcessFileName, EventID, Activity, CommandLine, EventSourceName, Type\n),\n(DeviceProcessEvents \n| where (FileName =~ \"powershell.exe\" and ((ProcessCommandLine has_all(\"try\", \"Add-MpPreference\", \"-ExclusionPath\", \"ProgramData\", \"catch\"))  or (ProcessCommandLine has_all('Add-PSSnapin', 'Get-Recipient', '-ExpandProperty', 'EmailAddresses', 'SmtpAddress', '-hidetableheaders'))))\nor ( InitiatingProcessFileName =~ 'powershell.exe' and (((InitiatingProcessCommandLine has_all('$file=', 'dllhost.exe', 'Invoke-WebRequest', '-OutFile')) or ((InitiatingProcessCommandLine has_all('$admins=', 'System.Security.Principal.SecurityIdentifier', 'Translate', '-split', 'localgroup', '/add', '$rdp='))))))\n| extend Account = strcat(InitiatingProcessAccountDomain, @'\\', InitiatingProcessAccountName),  Computer = DeviceName\n)\n)\n| extend HostName = tostring(split(Computer, \".\")[0]), DomainIndex = toint(indexof(Computer, '.'))\n| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)\n| extend AccountName = tostring(split(Account, @'\\')[1]), AccountNTDomain = tostring(split(Account, @'\\')[0])\n",
        "queryFrequency": "PT6H",
        "queryPeriod": "PT6H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion",
          "Exfiltration"
        ],
        "tags": [
          "Dev-0270"
        ],
        "techniques": [
          "T1048",
          "T1562"
        ],
        "templateVersion": "1.0.4",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}