AV detections related to Dev-0530 actors

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Id	5f171045-88ab-4634-baae-a7b6509f483b
Rulename	AV detections related to Dev-0530 actors
Description	This query looks for Microsoft Defender AV detections related to Dev-0530 actors. 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.
Severity	High
Tactics	Impact
Techniques	T1486
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/Detections/SecurityAlert/Dev-0530AVHits.yaml
Version	1.0.5
Arm template	5f171045-88ab-4634-baae-a7b6509f483b.json

KQL

let Dev0530_threats = dynamic(["Trojan:Win32/SiennaPurple.A", "Ransom:Win32/SiennaBlue.A", "Ransom:Win32/SiennaBlue.B"]);
SecurityAlert
| where ProviderName == "MDATP"
| extend ThreatName = tostring(parse_json(ExtendedProperties).ThreatName)
| extend ThreatFamilyName = tostring(parse_json(ExtendedProperties).ThreatFamilyName)
| where ThreatName in~ (Dev0530_threats) or ThreatFamilyName in~ (Dev0530_threats)
| extend CompromisedEntity = tolower(CompromisedEntity)
| join kind=inner (DeviceInfo
    | extend DeviceName = tolower(DeviceName)
) on $left.CompromisedEntity == $right.DeviceName
| summarize by bin(TimeGenerated, 1d), DisplayName, ThreatName, ThreatFamilyName, PublicIP, AlertSeverity, Description, tostring(LoggedOnUsers), DeviceId, TenantId, 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)
| project-away DomainIndex

YAML

name: AV detections related to Dev-0530 actors
queryPeriod: 1d
triggerOperator: gt
kind: Scheduled
id: 5f171045-88ab-4634-baae-a7b6509f483b
requiredDataConnectors:
- dataTypes:
  - SecurityAlert
  connectorId: MicrosoftThreatProtection
description: |
  'This query looks for Microsoft Defender AV detections related to  Dev-0530 actors.
  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.'  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityAlert/Dev-0530AVHits.yaml
queryFrequency: 1d
entityMappings:
- entityType: Host
  fieldMappings:
  - identifier: FullName
    columnName: CompromisedEntity
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: HostNameDomain
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: PublicIP
triggerThreshold: 0
severity: High
version: 1.0.5
tactics:
- Impact
metadata:
  source:
    kind: Community
  author:
    name: Microsoft Security Research
  support:
    tier: Community
  categories:
    domains:
    - Security - Others
query: |
  let Dev0530_threats = dynamic(["Trojan:Win32/SiennaPurple.A", "Ransom:Win32/SiennaBlue.A", "Ransom:Win32/SiennaBlue.B"]);
  SecurityAlert
  | where ProviderName == "MDATP"
  | extend ThreatName = tostring(parse_json(ExtendedProperties).ThreatName)
  | extend ThreatFamilyName = tostring(parse_json(ExtendedProperties).ThreatFamilyName)
  | where ThreatName in~ (Dev0530_threats) or ThreatFamilyName in~ (Dev0530_threats)
  | extend CompromisedEntity = tolower(CompromisedEntity)
  | join kind=inner (DeviceInfo
      | extend DeviceName = tolower(DeviceName)
  ) on $left.CompromisedEntity == $right.DeviceName
  | summarize by bin(TimeGenerated, 1d), DisplayName, ThreatName, ThreatFamilyName, PublicIP, AlertSeverity, Description, tostring(LoggedOnUsers), DeviceId, TenantId, 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)
  | project-away DomainIndex  
tags:
- Dev-0530 actors
relevantTechniques:
- T1486

ARM