Workspace deletion activity from an infected device

SecurityAlert
| where TimeGenerated > ago(1d)
| where ProductName == "Azure Active Directory Identity Protection"
| where AlertName == "Sign-in from an infected device"
| mv-apply EntityAccount=todynamic(Entities) on
(
where EntityAccount.Type == "account"
| extend AadTenantId = tostring(EntityAccount.AadTenantId), AadUserId = tostring(EntityAccount.AadUserId)
)
| mv-apply EntityIp=todynamic(Entities) on
(
where EntityIp.Type == "ip"
| extend IpAddress = tostring(EntityIp.Address)
)
| join kind=inner (
IdentityInfo
| distinct AccountTenantId, AccountObjectId, AccountUPN, AccountDisplayName
| extend UserAccount = AccountUPN
| extend UserName = AccountDisplayName
| where isnotempty(AccountDisplayName) and isnotempty(UserAccount)
| project AccountTenantId, AccountObjectId, UserAccount, UserName
)
on
$left.AadTenantId == $right.AccountTenantId,
$left.AadUserId == $right.AccountObjectId
| extend CompromisedEntity = iff(CompromisedEntity == "N/A" or isempty(CompromisedEntity), UserAccount, CompromisedEntity)
| project  AlertName, AlertSeverity, CompromisedEntity, UserAccount, IpAddress, TimeGenerated, UserName
| join kind=inner 
(
AzureActivity
| where OperationNameValue has_any ("/workspaces/computes/delete", "workspaces/delete") 
| where ActivityStatusValue has_any ("Succeeded", "Success")
| project TimeGenerated, ResourceProviderValue, _ResourceId, SubscriptionId, UserAccount=Caller, IpAddress=CallerIpAddress, CorrelationId, OperationId, ResourceGroup, TenantId
) on IpAddress, UserAccount
| extend AccountName = tostring(split(UserAccount, "@")[0]), AccountUPNSuffix = tostring(split(UserAccount, "@")[1])

queryPeriod: 14d
version: 1.0.8
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: UserAccount
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: AccountUPNSuffix
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IpAddress
- entityType: AzureResource
  fieldMappings:
  - identifier: ResourceId
    columnName: _ResourceId
metadata:
  author:
    name: Microsoft Security Research
  categories:
    domains:
    - Security - Threat Protection
    - Platform
  source:
    kind: Community
  support:
    tier: Community
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityAlert/Suspicious_WorkSpaceDeletion_Attempt.yaml
severity: Medium
id: a5b3429d-f1da-42b9-883c-327ecb7b91ff
relevantTechniques:
- T1078
- T1489
triggerOperator: gt
requiredDataConnectors:
- connectorId: AzureActiveDirectoryIdentityProtection
  dataTypes:
  - SecurityAlert (IPC)
- connectorId: AzureActivity
  dataTypes:
  - AzureActivity
- connectorId: BehaviorAnalytics
  dataTypes:
  - IdentityInfo
queryFrequency: 1d
triggerThreshold: 0
kind: Scheduled
name: Workspace deletion activity from an infected device
tactics:
- InitialAccess
- Impact
description: |
  'This query will alert on any sign-ins from devices infected with malware in correlation with workspace deletion activity. 
  Attackers may attempt to delete workspaces containing compute instances after successful compromise to cause service unavailability to regular business operation.'
query: |
  SecurityAlert
  | where TimeGenerated > ago(1d)
  | where ProductName == "Azure Active Directory Identity Protection"
  | where AlertName == "Sign-in from an infected device"
  | mv-apply EntityAccount=todynamic(Entities) on
  (
  where EntityAccount.Type == "account"
  | extend AadTenantId = tostring(EntityAccount.AadTenantId), AadUserId = tostring(EntityAccount.AadUserId)
  )
  | mv-apply EntityIp=todynamic(Entities) on
  (
  where EntityIp.Type == "ip"
  | extend IpAddress = tostring(EntityIp.Address)
  )
  | join kind=inner (
  IdentityInfo
  | distinct AccountTenantId, AccountObjectId, AccountUPN, AccountDisplayName
  | extend UserAccount = AccountUPN
  | extend UserName = AccountDisplayName
  | where isnotempty(AccountDisplayName) and isnotempty(UserAccount)
  | project AccountTenantId, AccountObjectId, UserAccount, UserName
  )
  on
  $left.AadTenantId == $right.AccountTenantId,
  $left.AadUserId == $right.AccountObjectId
  | extend CompromisedEntity = iff(CompromisedEntity == "N/A" or isempty(CompromisedEntity), UserAccount, CompromisedEntity)
  | project  AlertName, AlertSeverity, CompromisedEntity, UserAccount, IpAddress, TimeGenerated, UserName
  | join kind=inner 
  (
  AzureActivity
  | where OperationNameValue has_any ("/workspaces/computes/delete", "workspaces/delete") 
  | where ActivityStatusValue has_any ("Succeeded", "Success")
  | project TimeGenerated, ResourceProviderValue, _ResourceId, SubscriptionId, UserAccount=Caller, IpAddress=CallerIpAddress, CorrelationId, OperationId, ResourceGroup, TenantId
  ) on IpAddress, UserAccount
  | extend AccountName = tostring(split(UserAccount, "@")[0]), AccountUPNSuffix = tostring(split(UserAccount, "@")[1])

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/a5b3429d-f1da-42b9-883c-327ecb7b91ff')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a5b3429d-f1da-42b9-883c-327ecb7b91ff')]",
      "properties": {
        "alertRuleTemplateName": "a5b3429d-f1da-42b9-883c-327ecb7b91ff",
        "customDetails": null,
        "description": "'This query will alert on any sign-ins from devices infected with malware in correlation with workspace deletion activity. \nAttackers may attempt to delete workspaces containing compute instances after successful compromise to cause service unavailability to regular business operation.'\n",
        "displayName": "Workspace deletion activity from an infected device",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "UserAccount",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IpAddress",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "AzureResource",
            "fieldMappings": [
              {
                "columnName": "_ResourceId",
                "identifier": "ResourceId"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityAlert/Suspicious_WorkSpaceDeletion_Attempt.yaml",
        "query": "SecurityAlert\n| where TimeGenerated > ago(1d)\n| where ProductName == \"Azure Active Directory Identity Protection\"\n| where AlertName == \"Sign-in from an infected device\"\n| mv-apply EntityAccount=todynamic(Entities) on\n(\nwhere EntityAccount.Type == \"account\"\n| extend AadTenantId = tostring(EntityAccount.AadTenantId), AadUserId = tostring(EntityAccount.AadUserId)\n)\n| mv-apply EntityIp=todynamic(Entities) on\n(\nwhere EntityIp.Type == \"ip\"\n| extend IpAddress = tostring(EntityIp.Address)\n)\n| join kind=inner (\nIdentityInfo\n| distinct AccountTenantId, AccountObjectId, AccountUPN, AccountDisplayName\n| extend UserAccount = AccountUPN\n| extend UserName = AccountDisplayName\n| where isnotempty(AccountDisplayName) and isnotempty(UserAccount)\n| project AccountTenantId, AccountObjectId, UserAccount, UserName\n)\non\n$left.AadTenantId == $right.AccountTenantId,\n$left.AadUserId == $right.AccountObjectId\n| extend CompromisedEntity = iff(CompromisedEntity == \"N/A\" or isempty(CompromisedEntity), UserAccount, CompromisedEntity)\n| project  AlertName, AlertSeverity, CompromisedEntity, UserAccount, IpAddress, TimeGenerated, UserName\n| join kind=inner \n(\nAzureActivity\n| where OperationNameValue has_any (\"/workspaces/computes/delete\", \"workspaces/delete\") \n| where ActivityStatusValue has_any (\"Succeeded\", \"Success\")\n| project TimeGenerated, ResourceProviderValue, _ResourceId, SubscriptionId, UserAccount=Caller, IpAddress=CallerIpAddress, CorrelationId, OperationId, ResourceGroup, TenantId\n) on IpAddress, UserAccount\n| extend AccountName = tostring(split(UserAccount, \"@\")[0]), AccountUPNSuffix = tostring(split(UserAccount, \"@\")[1])\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact",
          "InitialAccess"
        ],
        "techniques": [
          "T1078",
          "T1489"
        ],
        "templateVersion": "1.0.8",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}