Workspace deletion activity from an infected device

Back


Id	a5b3429d-f1da-42b9-883c-327ecb7b91ff
Rulename	Workspace deletion activity from an infected device
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.
Severity	Medium
Tactics	InitialAccess Impact
Techniques	T1078 T1489
Required data connectors	AzureActiveDirectoryIdentityProtection AzureActivity BehaviorAnalytics
Kind	Scheduled
Query frequency	1d
Query period	14d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityAlert/Suspicious_WorkSpaceDeletion_Attempt.yaml
Version	1.0.8
Arm template	a5b3429d-f1da-42b9-883c-327ecb7b91ff.json

KQL

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])

YAML

kind: Scheduled
tactics:
- InitialAccess
- Impact
triggerThreshold: 0
metadata:
  source:
    kind: Community
  author:
    name: Microsoft Security Research
  support:
    tier: Community
  categories:
    domains:
    - Security - Threat Protection
    - Platform
triggerOperator: gt
version: 1.0.8
name: Workspace deletion activity from an infected device
queryFrequency: 1d
id: a5b3429d-f1da-42b9-883c-327ecb7b91ff
requiredDataConnectors:
- connectorId: AzureActiveDirectoryIdentityProtection
  dataTypes:
  - SecurityAlert (IPC)
- connectorId: AzureActivity
  dataTypes:
  - AzureActivity
- connectorId: BehaviorAnalytics
  dataTypes:
  - IdentityInfo
relevantTechniques:
- T1078
- T1489
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.'  
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
queryPeriod: 14d
severity: Medium
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])

ARM