[Deprecated] - Silk Typhoon UM Service writing suspicious file
Id | 7d6d8a8e-b08a-4082-8dbb-d7fd2cbbc35e |
Rulename | [Deprecated] - Silk Typhoon UM Service writing suspicious file |
Description | This query has been deprecated as the associated IoCs (Indicators of Compromise) are outdated and no longer relevant.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 | InitialAccess |
Techniques | T1190 |
Required data connectors | MicrosoftThreatProtection SecurityEvents WindowsForwardedEvents WindowsSecurityEvents |
Kind | Scheduled |
Query frequency | 1d |
Query period | 1d |
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/SilkTyphoonUmServiceSuspiciousFile.yaml |
Version | 2.0.0 |
Arm template | 7d6d8a8e-b08a-4082-8dbb-d7fd2cbbc35e.json |
let scriptExtensions = dynamic([".php", ".jsp", ".js", ".aspx", ".asmx", ".asax", ".cfm", ".shtml"]);
union isfuzzy=true
(SecurityEvent
| where EventID == 4663
| where Process has_any ("umworkerprocess.exe", "UMService.exe")
| where ObjectName has_any (scriptExtensions)
| where AccessMask in ('0x2','0x100', '0x10', '0x4')
| extend timestamp = TimeGenerated, AccountCustomEntity = Account, HostCustomEntity = Computer, IPCustomEntity = IpAddress
),
(WindowsEvent
| where EventID == 4663 and EventData has_any ("umworkerprocess.exe", "UMService.exe") and EventData has_any (scriptExtensions)
| where EventData has_any ('0x2','0x100', '0x10', '0x4')
| extend NewProcessName = tostring(EventData.NewProcessName)
| extend Process=tostring(split(NewProcessName, '\\')[-1])
| where Process has_any ("umworkerprocess.exe", "UMService.exe")
| extend ObjectName = tostring(EventData.ObjectName)
| where ObjectName has_any (scriptExtensions)
| extend AccessMask = tostring(EventData.AccessMask)
| where AccessMask in ('0x2','0x100', '0x10', '0x4')
| extend Account = strcat(EventData.SubjectDomainName,"\\", EventData.SubjectUserName)
| extend IpAddress = tostring(EventData.IpAddress)
| extend timestamp = TimeGenerated, AccountCustomEntity = Account, HostCustomEntity = Computer, IPCustomEntity = IpAddress
),
(imFileEvent
| where EventType == "FileCreated"
| where ActingProcessName has_any ("umworkerprocess.exe", "UMService.exe")
and
TargetFileName has_any (scriptExtensions)
| extend timestamp = TimeGenerated, AccountCustomEntity = ActorUsername, HostCustomEntity = DvcHostname
),
(DeviceFileEvents
| where ActionType =~ "FileCreated"
| where InitiatingProcessFileName has_any ("umworkerprocess.exe", "UMService.exe")
| where FileName has_any(scriptExtensions)
| extend timestamp = TimeGenerated, AccountCustomEntity = InitiatingProcessAccountUpn, HostCustomEntity = DeviceName, IPCustomEntity = RequestSourceIP)
triggerOperator: gt
queryFrequency: 1d
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:
- DeviceFileEvents
- connectorId: WindowsSecurityEvents
dataTypes:
- SecurityEvents
- connectorId: WindowsForwardedEvents
dataTypes:
- WindowsEvent
version: 2.0.0
queryPeriod: 1d
name: '[Deprecated] - Silk Typhoon UM Service writing suspicious file'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Legacy IOC based Threat Protection/Deprecated Analytic Rules/SilkTyphoonUmServiceSuspiciousFile.yaml
id: 7d6d8a8e-b08a-4082-8dbb-d7fd2cbbc35e
tags:
- Schema: ASIMFileEvent
SchemaVersion: 0.1.0
tactics:
- InitialAccess
relevantTechniques:
- T1190
severity: High
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: InitiatingProcessAccountUpn
entityType: Account
- fieldMappings:
- identifier: FullName
columnName: AccountCustomEntity
entityType: Account
- fieldMappings:
- identifier: FullName
columnName: HostCustomEntity
entityType: Host
- fieldMappings:
- identifier: FullName
columnName: DeviceName
entityType: Host
- fieldMappings:
- identifier: Address
columnName: IPCustomEntity
entityType: IP
query: |
let scriptExtensions = dynamic([".php", ".jsp", ".js", ".aspx", ".asmx", ".asax", ".cfm", ".shtml"]);
union isfuzzy=true
(SecurityEvent
| where EventID == 4663
| where Process has_any ("umworkerprocess.exe", "UMService.exe")
| where ObjectName has_any (scriptExtensions)
| where AccessMask in ('0x2','0x100', '0x10', '0x4')
| extend timestamp = TimeGenerated, AccountCustomEntity = Account, HostCustomEntity = Computer, IPCustomEntity = IpAddress
),
(WindowsEvent
| where EventID == 4663 and EventData has_any ("umworkerprocess.exe", "UMService.exe") and EventData has_any (scriptExtensions)
| where EventData has_any ('0x2','0x100', '0x10', '0x4')
| extend NewProcessName = tostring(EventData.NewProcessName)
| extend Process=tostring(split(NewProcessName, '\\')[-1])
| where Process has_any ("umworkerprocess.exe", "UMService.exe")
| extend ObjectName = tostring(EventData.ObjectName)
| where ObjectName has_any (scriptExtensions)
| extend AccessMask = tostring(EventData.AccessMask)
| where AccessMask in ('0x2','0x100', '0x10', '0x4')
| extend Account = strcat(EventData.SubjectDomainName,"\\", EventData.SubjectUserName)
| extend IpAddress = tostring(EventData.IpAddress)
| extend timestamp = TimeGenerated, AccountCustomEntity = Account, HostCustomEntity = Computer, IPCustomEntity = IpAddress
),
(imFileEvent
| where EventType == "FileCreated"
| where ActingProcessName has_any ("umworkerprocess.exe", "UMService.exe")
and
TargetFileName has_any (scriptExtensions)
| extend timestamp = TimeGenerated, AccountCustomEntity = ActorUsername, HostCustomEntity = DvcHostname
),
(DeviceFileEvents
| where ActionType =~ "FileCreated"
| where InitiatingProcessFileName has_any ("umworkerprocess.exe", "UMService.exe")
| where FileName has_any(scriptExtensions)
| extend timestamp = TimeGenerated, AccountCustomEntity = InitiatingProcessAccountUpn, HostCustomEntity = DeviceName, IPCustomEntity = RequestSourceIP)
{
"$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/7d6d8a8e-b08a-4082-8dbb-d7fd2cbbc35e')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/7d6d8a8e-b08a-4082-8dbb-d7fd2cbbc35e')]",
"properties": {
"alertRuleTemplateName": "7d6d8a8e-b08a-4082-8dbb-d7fd2cbbc35e",
"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] - Silk Typhoon UM Service writing suspicious file",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "InitiatingProcessAccountUpn",
"identifier": "FullName"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "FullName"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "HostCustomEntity",
"identifier": "FullName"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "DeviceName",
"identifier": "FullName"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Legacy IOC based Threat Protection/Deprecated Analytic Rules/SilkTyphoonUmServiceSuspiciousFile.yaml",
"query": "let scriptExtensions = dynamic([\".php\", \".jsp\", \".js\", \".aspx\", \".asmx\", \".asax\", \".cfm\", \".shtml\"]);\nunion isfuzzy=true\n(SecurityEvent\n| where EventID == 4663\n| where Process has_any (\"umworkerprocess.exe\", \"UMService.exe\")\n| where ObjectName has_any (scriptExtensions)\n| where AccessMask in ('0x2','0x100', '0x10', '0x4')\n| extend timestamp = TimeGenerated, AccountCustomEntity = Account, HostCustomEntity = Computer, IPCustomEntity = IpAddress\n),\n (WindowsEvent\n| where EventID == 4663 and EventData has_any (\"umworkerprocess.exe\", \"UMService.exe\") and EventData has_any (scriptExtensions) \n| where EventData has_any ('0x2','0x100', '0x10', '0x4')\n| extend NewProcessName = tostring(EventData.NewProcessName)\n| extend Process=tostring(split(NewProcessName, '\\\\')[-1])\n| where Process has_any (\"umworkerprocess.exe\", \"UMService.exe\")\n| extend ObjectName = tostring(EventData.ObjectName)\n| where ObjectName has_any (scriptExtensions)\n| extend AccessMask = tostring(EventData.AccessMask)\n| where AccessMask in ('0x2','0x100', '0x10', '0x4')\n| extend Account = strcat(EventData.SubjectDomainName,\"\\\\\", EventData.SubjectUserName)\n| extend IpAddress = tostring(EventData.IpAddress)\n| extend timestamp = TimeGenerated, AccountCustomEntity = Account, HostCustomEntity = Computer, IPCustomEntity = IpAddress\n),\n(imFileEvent\n| where EventType == \"FileCreated\"\n| where ActingProcessName has_any (\"umworkerprocess.exe\", \"UMService.exe\")\n and\n TargetFileName has_any (scriptExtensions)\n| extend timestamp = TimeGenerated, AccountCustomEntity = ActorUsername, HostCustomEntity = DvcHostname\n),\n(DeviceFileEvents\n| where ActionType =~ \"FileCreated\"\n| where InitiatingProcessFileName has_any (\"umworkerprocess.exe\", \"UMService.exe\")\n| where FileName has_any(scriptExtensions)\n| extend timestamp = TimeGenerated, AccountCustomEntity = InitiatingProcessAccountUpn, HostCustomEntity = DeviceName, IPCustomEntity = RequestSourceIP)\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"severity": "High",
"status": "Available",
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"tags": [
{
"Schema": "ASIMFileEvent",
"SchemaVersion": "0.1.0"
}
],
"techniques": [
"T1190"
],
"templateVersion": "2.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}