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 Defender XDR/Analytic Rules/AVTarrask.yaml
Version	1.0.4
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 = tostring(split(CompromisedEntity, ".")[0]), DomainIndex = toint(indexof(CompromisedEntity, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(CompromisedEntity, DomainIndex + 1), CompromisedEntity)

YAML

entityMappings:
- entityType: Host
  fieldMappings:
  - identifier: FullName
    columnName: CompromisedEntity
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: HostNameDomain
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: PublicIP
tactics:
- Persistence
requiredDataConnectors:
- dataTypes:
  - SecurityAlert
  connectorId: MicrosoftThreatProtection
id: 1785d372-b9fe-4283-96a6-3a1d83cabfd1
severity: High
status: Available
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 = tostring(split(CompromisedEntity, ".")[0]), DomainIndex = toint(indexof(CompromisedEntity, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(CompromisedEntity, DomainIndex + 1), CompromisedEntity)  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/AVTarrask.yaml
kind: Scheduled
queryPeriod: 1d
version: 1.0.4
name: AV detections related to Tarrask malware
queryFrequency: 1d
triggerThreshold: 0
relevantTechniques:
- T1053
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/'  
triggerOperator: gt

ARM