Dev-0270 Registry IOC - September 2022

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Id	2566e99f-ad0f-472a-b9ac-d3899c9283e6
Rulename	Dev-0270 Registry IOC - September 2022
Description	The query below identifies modification of registry by Dev-0270 actor to disable security feature as well as to add ransom notes
Severity	High
Tactics	Impact
Techniques	T1486
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-0270RegistryIOCSep2022.yaml
Version	1.0.3
Arm template	2566e99f-ad0f-472a-b9ac-d3899c9283e6.json

KQL

(union isfuzzy=true
(SecurityEvent
| where EventID == 4688
| where (CommandLine has_all  ('reg', 'add', 'HKLM\\SOFTWARE\\Policies\\', '/v','/t', 'REG_DWORD', '/d', '/f') and CommandLine has_any('DisableRealtimeMonitoring', 'UseTPMKey', 'UseTPMKeyPIN', 'UseAdvancedStartup', 'EnableBDEWithNoTPM', 'RecoveryKeyMessageSource'))
  or CommandLine has_all ('reg', 'add', 'HKLM\\SOFTWARE\\Policies\\', '/v','/t', 'REG_DWORD', '/d', '/f', 'RecoveryKeyMessage', 'Your drives are Encrypted!', '@')
| project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, EventID, Activity, CommandLine, EventSourceName, Type
),
(DeviceProcessEvents 
| where (InitiatingProcessCommandLine has_all(@'"reg"', 'add', @'"HKLM\SOFTWARE\Policies\', '/v','/t', 'REG_DWORD', '/d', '/f') 
   and InitiatingProcessCommandLine has_any('DisableRealtimeMonitoring', 'UseTPMKey', 'UseTPMKeyPIN', 'UseAdvancedStartup', 'EnableBDEWithNoTPM', 'RecoveryKeyMessageSource') ) 
   or InitiatingProcessCommandLine has_all('"reg"', 'add', @'"HKLM\SOFTWARE\Policies\', '/v','/t', 'REG_DWORD', '/d', '/f', 'RecoveryKeyMessage', 'Your drives are Encrypted!', '@')
| 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

relevantTechniques:
- T1486
name: Dev-0270 Registry IOC - September 2022
requiredDataConnectors:
- dataTypes:
  - SecurityEvent
  connectorId: SecurityEvents
- dataTypes:
  - SecurityEvent
  connectorId: WindowsSecurityEvents
- dataTypes:
  - DeviceProcessEvents
  connectorId: MicrosoftThreatProtection
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
triggerThreshold: 0
id: 2566e99f-ad0f-472a-b9ac-d3899c9283e6
tactics:
- Impact
version: 1.0.3
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Dev 0270 Detection and Hunting/Analytic Rules/Dev-0270RegistryIOCSep2022.yaml
queryPeriod: 6h
kind: Scheduled
tags:
- Dev-0270
queryFrequency: 6h
severity: High
status: Available
description: |
    'The query below identifies modification of registry by Dev-0270 actor to disable security feature as well as to add ransom notes'
query: |
  (union isfuzzy=true
  (SecurityEvent
  | where EventID == 4688
  | where (CommandLine has_all  ('reg', 'add', 'HKLM\\SOFTWARE\\Policies\\', '/v','/t', 'REG_DWORD', '/d', '/f') and CommandLine has_any('DisableRealtimeMonitoring', 'UseTPMKey', 'UseTPMKeyPIN', 'UseAdvancedStartup', 'EnableBDEWithNoTPM', 'RecoveryKeyMessageSource'))
    or CommandLine has_all ('reg', 'add', 'HKLM\\SOFTWARE\\Policies\\', '/v','/t', 'REG_DWORD', '/d', '/f', 'RecoveryKeyMessage', 'Your drives are Encrypted!', '@')
  | project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, EventID, Activity, CommandLine, EventSourceName, Type
  ),
  (DeviceProcessEvents 
  | where (InitiatingProcessCommandLine has_all(@'"reg"', 'add', @'"HKLM\SOFTWARE\Policies\', '/v','/t', 'REG_DWORD', '/d', '/f') 
     and InitiatingProcessCommandLine has_any('DisableRealtimeMonitoring', 'UseTPMKey', 'UseTPMKeyPIN', 'UseAdvancedStartup', 'EnableBDEWithNoTPM', 'RecoveryKeyMessageSource') ) 
     or InitiatingProcessCommandLine has_all('"reg"', 'add', @'"HKLM\SOFTWARE\Policies\', '/v','/t', 'REG_DWORD', '/d', '/f', 'RecoveryKeyMessage', 'Your drives are Encrypted!', '@')
  | 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])  
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/2566e99f-ad0f-472a-b9ac-d3899c9283e6')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/2566e99f-ad0f-472a-b9ac-d3899c9283e6')]",
      "properties": {
        "alertRuleTemplateName": "2566e99f-ad0f-472a-b9ac-d3899c9283e6",
        "customDetails": null,
        "description": "'The query below identifies modification of registry by Dev-0270 actor to disable security feature as well as to add ransom notes'\n",
        "displayName": "Dev-0270 Registry IOC - September 2022",
        "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-0270RegistryIOCSep2022.yaml",
        "query": "(union isfuzzy=true\n(SecurityEvent\n| where EventID == 4688\n| where (CommandLine has_all  ('reg', 'add', 'HKLM\\\\SOFTWARE\\\\Policies\\\\', '/v','/t', 'REG_DWORD', '/d', '/f') and CommandLine has_any('DisableRealtimeMonitoring', 'UseTPMKey', 'UseTPMKeyPIN', 'UseAdvancedStartup', 'EnableBDEWithNoTPM', 'RecoveryKeyMessageSource'))\n  or CommandLine has_all ('reg', 'add', 'HKLM\\\\SOFTWARE\\\\Policies\\\\', '/v','/t', 'REG_DWORD', '/d', '/f', 'RecoveryKeyMessage', 'Your drives are Encrypted!', '@')\n| project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, EventID, Activity, CommandLine, EventSourceName, Type\n),\n(DeviceProcessEvents \n| where (InitiatingProcessCommandLine has_all(@'\"reg\"', 'add', @'\"HKLM\\SOFTWARE\\Policies\\', '/v','/t', 'REG_DWORD', '/d', '/f') \n   and InitiatingProcessCommandLine has_any('DisableRealtimeMonitoring', 'UseTPMKey', 'UseTPMKeyPIN', 'UseAdvancedStartup', 'EnableBDEWithNoTPM', 'RecoveryKeyMessageSource') ) \n   or InitiatingProcessCommandLine has_all('\"reg\"', 'add', @'\"HKLM\\SOFTWARE\\Policies\\', '/v','/t', 'REG_DWORD', '/d', '/f', 'RecoveryKeyMessage', 'Your drives are Encrypted!', '@')\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": [
          "Impact"
        ],
        "tags": [
          "Dev-0270"
        ],
        "techniques": [
          "T1486"
        ],
        "templateVersion": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}