AV detections related to Tarrask malware

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Id	1785d372-b9fe-4283-96a6-3a1d83cabfd1
Rulename	AV detections related to Tarrask malware
Description	This query looks for Microsoft Defender AV detections related to Tarrask malware. In Microsoft Sentinel, the SecurityAlerts table includes only the Device Name of the affected device, this query joins the DeviceInfo table to clearly connect other information such as Device group, ip, logged-on users etc. This would allow the Microsoft Sentinel analyst to have more context related to the alert, if available. Reference: https://www.microsoft.com/security/blog/2022/04/12/tarrask-malware-uses-scheduled-tasks-for-defense-evasion/
Severity	High
Tactics	Persistence
Techniques	T1053
Required data connectors	MicrosoftThreatProtection
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/Microsoft 365 Defender/Analytic Rules/AVTarrask.yaml
Version	1.0.2
Arm template	1785d372-b9fe-4283-96a6-3a1d83cabfd1.json

KQL

let Tarrask_threats = dynamic(["HackTool:Win64/Tarrask!MS", "HackTool:Win64/Ligolo!MSR", "Behavior:Win32/ScheduledTaskHide.A", "Tarrask"]);
DeviceInfo
| extend DeviceName = tolower(DeviceName)
| join kind=rightouter ( SecurityAlert
| where ProviderName =~ "MDATP"
| extend ThreatName = tostring(parse_json(ExtendedProperties).ThreatName)
| extend ThreatFamilyName = tostring(parse_json(ExtendedProperties).ThreatFamilyName)
| where ThreatName in~ (Tarrask_threats) or ThreatFamilyName in~ (Tarrask_threats)
| extend CompromisedEntity = tolower(CompromisedEntity)
) on $left.DeviceName == $right.CompromisedEntity
| summarize by DisplayName, ThreatName, ThreatFamilyName, PublicIP, AlertSeverity, Description, tostring(LoggedOnUsers), DeviceId, TenantId , bin(TimeGenerated, 1d), CompromisedEntity, tostring(LoggedOnUsers), ProductName, Entities
| extend HostName = iff(CompromisedEntity has '.', substring(CompromisedEntity,0,indexof(CompromisedEntity,'.')),CompromisedEntity)
| extend DnsDomain = iff(CompromisedEntity has '.', substring(CompromisedEntity,indexof(CompromisedEntity,'.')+1),"")

YAML

kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft 365 Defender/Analytic Rules/AVTarrask.yaml
severity: High
name: AV detections related to Tarrask malware
entityMappings:
- entityType: Host
  fieldMappings:
  - columnName: HostName
    identifier: HostName
  - columnName: DnsDomain
    identifier: DnsDomain
- entityType: IP
  fieldMappings:
  - columnName: PublicIP
    identifier: Address
relevantTechniques:
- T1053
queryFrequency: 1d
triggerThreshold: 0
queryPeriod: 1d
description: |
  'This query looks for Microsoft Defender AV detections related to Tarrask malware. In Microsoft Sentinel, the SecurityAlerts table 
   includes only the Device Name of the affected device, this query joins the DeviceInfo table to clearly connect other information such as Device group, ip, logged-on users etc. 
   This would allow the Microsoft Sentinel analyst to have more context related to the alert, if available.
   Reference: https://www.microsoft.com/security/blog/2022/04/12/tarrask-malware-uses-scheduled-tasks-for-defense-evasion/'  
id: 1785d372-b9fe-4283-96a6-3a1d83cabfd1
version: 1.0.2
tactics:
- Persistence
query: |
  let Tarrask_threats = dynamic(["HackTool:Win64/Tarrask!MS", "HackTool:Win64/Ligolo!MSR", "Behavior:Win32/ScheduledTaskHide.A", "Tarrask"]);
  DeviceInfo
  | extend DeviceName = tolower(DeviceName)
  | join kind=rightouter ( SecurityAlert
  | where ProviderName =~ "MDATP"
  | extend ThreatName = tostring(parse_json(ExtendedProperties).ThreatName)
  | extend ThreatFamilyName = tostring(parse_json(ExtendedProperties).ThreatFamilyName)
  | where ThreatName in~ (Tarrask_threats) or ThreatFamilyName in~ (Tarrask_threats)
  | extend CompromisedEntity = tolower(CompromisedEntity)
  ) on $left.DeviceName == $right.CompromisedEntity
  | summarize by DisplayName, ThreatName, ThreatFamilyName, PublicIP, AlertSeverity, Description, tostring(LoggedOnUsers), DeviceId, TenantId , bin(TimeGenerated, 1d), CompromisedEntity, tostring(LoggedOnUsers), ProductName, Entities
  | extend HostName = iff(CompromisedEntity has '.', substring(CompromisedEntity,0,indexof(CompromisedEntity,'.')),CompromisedEntity)
  | extend DnsDomain = iff(CompromisedEntity has '.', substring(CompromisedEntity,indexof(CompromisedEntity,'.')+1),"")  
status: Available
requiredDataConnectors:
- dataTypes:
  - SecurityAlert
  connectorId: MicrosoftThreatProtection
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": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/1785d372-b9fe-4283-96a6-3a1d83cabfd1')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1785d372-b9fe-4283-96a6-3a1d83cabfd1')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "AV detections related to Tarrask malware",
        "description": "'This query looks for Microsoft Defender AV detections related to Tarrask malware. In Microsoft Sentinel, the SecurityAlerts table \n includes only the Device Name of the affected device, this query joins the DeviceInfo table to clearly connect other information such as Device group, ip, logged-on users etc. \n This would allow the Microsoft Sentinel analyst to have more context related to the alert, if available.\n Reference: https://www.microsoft.com/security/blog/2022/04/12/tarrask-malware-uses-scheduled-tasks-for-defense-evasion/'\n",
        "severity": "High",
        "enabled": true,
        "query": "let Tarrask_threats = dynamic([\"HackTool:Win64/Tarrask!MS\", \"HackTool:Win64/Ligolo!MSR\", \"Behavior:Win32/ScheduledTaskHide.A\", \"Tarrask\"]);\nDeviceInfo\n| extend DeviceName = tolower(DeviceName)\n| join kind=rightouter ( SecurityAlert\n| where ProviderName =~ \"MDATP\"\n| extend ThreatName = tostring(parse_json(ExtendedProperties).ThreatName)\n| extend ThreatFamilyName = tostring(parse_json(ExtendedProperties).ThreatFamilyName)\n| where ThreatName in~ (Tarrask_threats) or ThreatFamilyName in~ (Tarrask_threats)\n| extend CompromisedEntity = tolower(CompromisedEntity)\n) on $left.DeviceName == $right.CompromisedEntity\n| summarize by DisplayName, ThreatName, ThreatFamilyName, PublicIP, AlertSeverity, Description, tostring(LoggedOnUsers), DeviceId, TenantId , bin(TimeGenerated, 1d), CompromisedEntity, tostring(LoggedOnUsers), ProductName, Entities\n| extend HostName = iff(CompromisedEntity has '.', substring(CompromisedEntity,0,indexof(CompromisedEntity,'.')),CompromisedEntity)\n| extend DnsDomain = iff(CompromisedEntity has '.', substring(CompromisedEntity,indexof(CompromisedEntity,'.')+1),\"\")\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence"
        ],
        "techniques": [
          "T1053"
        ],
        "alertRuleTemplateName": "1785d372-b9fe-4283-96a6-3a1d83cabfd1",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "identifier": "HostName",
                "columnName": "HostName"
              },
              {
                "identifier": "DnsDomain",
                "columnName": "DnsDomain"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "PublicIP"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft 365 Defender/Analytic Rules/AVTarrask.yaml",
        "status": "Available",
        "templateVersion": "1.0.2"
      }
    }
  ]
}