[Deprecated] - MSHTML vulnerability CVE-2021-40444 attack
Id | 972c89fa-c969-4d12-932f-04d55d145299 |
Rulename | [Deprecated] - MSHTML vulnerability CVE-2021-40444 attack |
Description | This query has been deprecated as the associated IoCs (Indicators of Compromise) are outdated and no longer relevant. To ensure effective threat detection, it is recommended to implement Microsoft’s Threat Intelligence solution, which enables matching your log data with the most up-to-date IoCs generated by Microsoft. This solution can be installed from the Microsoft Sentinel Content Hub if not currently deployed. More details on the Content Hub can be found here: https://learn.microsoft.com/azure/sentinel/sentinel-solutions-deploy |
Severity | High |
Tactics | Execution |
Techniques | T1203 |
Required data connectors | MicrosoftThreatProtection SecurityEvents |
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/Legacy IOC based Threat Protection/Deprecated Analytic Rules/MSHTMLVuln.yaml |
Version | 2.0.0 |
Arm template | 972c89fa-c969-4d12-932f-04d55d145299.json |
( union isfuzzy=true
(SecurityEvent
| where EventID==4688
| where isnotempty(CommandLine)
| extend FileName = Process, ProcessCommandLine = CommandLine
| where (FileName in~('control.exe','rundll32.exe') and ProcessCommandLine has '.cpl:')
or ProcessCommandLine matches regex @'\".[a-zA-Z]{2,4}:\.\.\/\.\.'
| extend timestamp = TimeGenerated, AccountCustomEntity = Account, HostCustomEntity = Computer
),
(DeviceProcessEvents
| where (FileName in~('control.exe','rundll32.exe') and ProcessCommandLine has '.cpl:')
or ProcessCommandLine matches regex @'\".[a-zA-Z]{2,4}:\.\.\/\.\.'
| extend timestamp = TimeGenerated, AccountCustomEntity = InitiatingProcessAccountUpn, HostCustomEntity = DeviceName
),
(Event
| where Source == "Microsoft-Windows-Sysmon"
| where EventID == 1
| extend EventData = parse_xml(EventData).DataItem.EventData.Data
| mv-expand bagexpansion=array EventData
| evaluate bag_unpack(EventData)
| extend Key = tostring(column_ifexists('@Name', "")), Value = column_ifexists('#text', "")
| evaluate pivot(Key, any(Value), TimeGenerated, Source, EventLog, Computer, EventLevel, EventLevelName, UserName, RenderedDescription, MG, ManagementGroupName, Type, _ResourceId)
| extend Image = column_ifexists("Image", ""), ProcessCommandLine = column_ifexists("CommandLine", "")
| extend FileName = split(Image, '\\', -1)[-1]
| where (FileName in~('control.exe','rundll32.exe') and ProcessCommandLine has '.cpl:')
or ProcessCommandLine matches regex @'\".[a-zA-Z]{2,4}:\.\.\/\.\.'
| extend timestamp = TimeGenerated, AccountCustomEntity = UserName, HostCustomEntity = Computer
)
)
triggerOperator: gt
queryFrequency: 1h
description: |
'This query has been deprecated as the associated IoCs (Indicators of Compromise) are outdated and no longer relevant. To ensure effective threat detection, it is recommended to implement Microsoft's Threat Intelligence solution, which enables matching your log data with the most up-to-date IoCs generated by Microsoft. This solution can be installed from the Microsoft Sentinel Content Hub if not currently deployed. More details on the Content Hub can be found here: https://learn.microsoft.com/azure/sentinel/sentinel-solutions-deploy'
status: Available
kind: Scheduled
triggerThreshold: 0
requiredDataConnectors:
- connectorId: SecurityEvents
dataTypes:
- SecurityEvent
- connectorId: MicrosoftThreatProtection
dataTypes:
- DeviceProcessEvents
version: 2.0.0
queryPeriod: 1h
name: '[Deprecated] - MSHTML vulnerability CVE-2021-40444 attack'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Legacy IOC based Threat Protection/Deprecated Analytic Rules/MSHTMLVuln.yaml
id: 972c89fa-c969-4d12-932f-04d55d145299
tags:
- CVE-2021-40444
- DEV-0413
tactics:
- Execution
relevantTechniques:
- T1203
severity: High
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: AccountCustomEntity
entityType: Account
- fieldMappings:
- identifier: FullName
columnName: HostCustomEntity
entityType: Host
query: |
( union isfuzzy=true
(SecurityEvent
| where EventID==4688
| where isnotempty(CommandLine)
| extend FileName = Process, ProcessCommandLine = CommandLine
| where (FileName in~('control.exe','rundll32.exe') and ProcessCommandLine has '.cpl:')
or ProcessCommandLine matches regex @'\".[a-zA-Z]{2,4}:\.\.\/\.\.'
| extend timestamp = TimeGenerated, AccountCustomEntity = Account, HostCustomEntity = Computer
),
(DeviceProcessEvents
| where (FileName in~('control.exe','rundll32.exe') and ProcessCommandLine has '.cpl:')
or ProcessCommandLine matches regex @'\".[a-zA-Z]{2,4}:\.\.\/\.\.'
| extend timestamp = TimeGenerated, AccountCustomEntity = InitiatingProcessAccountUpn, HostCustomEntity = DeviceName
),
(Event
| where Source == "Microsoft-Windows-Sysmon"
| where EventID == 1
| extend EventData = parse_xml(EventData).DataItem.EventData.Data
| mv-expand bagexpansion=array EventData
| evaluate bag_unpack(EventData)
| extend Key = tostring(column_ifexists('@Name', "")), Value = column_ifexists('#text', "")
| evaluate pivot(Key, any(Value), TimeGenerated, Source, EventLog, Computer, EventLevel, EventLevelName, UserName, RenderedDescription, MG, ManagementGroupName, Type, _ResourceId)
| extend Image = column_ifexists("Image", ""), ProcessCommandLine = column_ifexists("CommandLine", "")
| extend FileName = split(Image, '\\', -1)[-1]
| where (FileName in~('control.exe','rundll32.exe') and ProcessCommandLine has '.cpl:')
or ProcessCommandLine matches regex @'\".[a-zA-Z]{2,4}:\.\.\/\.\.'
| extend timestamp = TimeGenerated, AccountCustomEntity = UserName, HostCustomEntity = Computer
)
)
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2023-02-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/972c89fa-c969-4d12-932f-04d55d145299')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/972c89fa-c969-4d12-932f-04d55d145299')]",
"properties": {
"alertRuleTemplateName": "972c89fa-c969-4d12-932f-04d55d145299",
"customDetails": null,
"description": "'This query has been deprecated as the associated IoCs (Indicators of Compromise) are outdated and no longer relevant. To ensure effective threat detection, it is recommended to implement Microsoft's Threat Intelligence solution, which enables matching your log data with the most up-to-date IoCs generated by Microsoft. This solution can be installed from the Microsoft Sentinel Content Hub if not currently deployed. More details on the Content Hub can be found here: https://learn.microsoft.com/azure/sentinel/sentinel-solutions-deploy'\n",
"displayName": "[Deprecated] - MSHTML vulnerability CVE-2021-40444 attack",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "FullName"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "HostCustomEntity",
"identifier": "FullName"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Legacy IOC based Threat Protection/Deprecated Analytic Rules/MSHTMLVuln.yaml",
"query": "( union isfuzzy=true\n(SecurityEvent\n| where EventID==4688\n| where isnotempty(CommandLine)\n| extend FileName = Process, ProcessCommandLine = CommandLine\n| where (FileName in~('control.exe','rundll32.exe') and ProcessCommandLine has '.cpl:')\n or ProcessCommandLine matches regex @'\\\".[a-zA-Z]{2,4}:\\.\\.\\/\\.\\.'\n| extend timestamp = TimeGenerated, AccountCustomEntity = Account, HostCustomEntity = Computer\n),\n(DeviceProcessEvents\n| where (FileName in~('control.exe','rundll32.exe') and ProcessCommandLine has '.cpl:')\nor ProcessCommandLine matches regex @'\\\".[a-zA-Z]{2,4}:\\.\\.\\/\\.\\.'\n| extend timestamp = TimeGenerated, AccountCustomEntity = InitiatingProcessAccountUpn, HostCustomEntity = DeviceName\n),\n(Event\n| where Source == \"Microsoft-Windows-Sysmon\"\n| where EventID == 1 \n| extend EventData = parse_xml(EventData).DataItem.EventData.Data\n| mv-expand bagexpansion=array EventData\n| evaluate bag_unpack(EventData)\n| extend Key = tostring(column_ifexists('@Name', \"\")), Value = column_ifexists('#text', \"\")\n| evaluate pivot(Key, any(Value), TimeGenerated, Source, EventLog, Computer, EventLevel, EventLevelName, UserName, RenderedDescription, MG, ManagementGroupName, Type, _ResourceId)\n| extend Image = column_ifexists(\"Image\", \"\"), ProcessCommandLine = column_ifexists(\"CommandLine\", \"\")\n| extend FileName = split(Image, '\\\\', -1)[-1]\n| where (FileName in~('control.exe','rundll32.exe') and ProcessCommandLine has '.cpl:')\n or ProcessCommandLine matches regex @'\\\".[a-zA-Z]{2,4}:\\.\\.\\/\\.\\.'\n| extend timestamp = TimeGenerated, AccountCustomEntity = UserName, HostCustomEntity = Computer\n)\n)\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "High",
"status": "Available",
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Execution"
],
"tags": [
"CVE-2021-40444",
"DEV-0413"
],
"techniques": [
"T1203"
],
"templateVersion": "2.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}