Sdelete deployed via GPO and run recursively ASIM Version

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Id	30c8b802-ace1-4408-bc29-4c5c5afb49e1
Rulename	Sdelete deployed via GPO and run recursively (ASIM Version)
Description	This query looks for the Sdelete process being run recursively after being deployed to a host via GPO. Attackers could use this technique to deploy Sdelete to multiple host and delete data on them. This query uses the Advanced Security Information Model. Parsers will need to be deployed before use: https://docs.microsoft.com/azure/sentinel/normalization
Severity	Medium
Tactics	Impact
Techniques	T1485
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/ASimProcess/SdeletedeployedviaGPOandrunrecursively(ASIMVersion).yaml
Version	1.0.6
Arm template	30c8b802-ace1-4408-bc29-4c5c5afb49e1.json

KQL

_Im_ProcessEvent
| where EventType =~ "ProcessCreated"
| where Process endswith "svchost.exe"
| where CommandLine has "-k GPSvcGroup" or CommandLine has "-s gpsvc"
| extend timekey = bin(TimeGenerated, 1m)
| project timekey, ActingProcessId, Dvc
| join kind=inner (
  _Im_ProcessEvent
  | where EventType =~ "ProcessCreated"
  | where Process =~ "sdelete.exe" or CommandLine has "sdelete"
  | where ActingProcessName endswith "svchost.exe"
  | where CommandLine has_all ("-s", "-r")
  | extend timekey = bin(TimeGenerated, 1m)
  ) 
  on $left.ActingProcessId == $right.ParentProcessId, timekey, Dvc
| extend AccountName = tostring(split(ActorUsername, @'\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\')[0])
| extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
| project-away DomainIndex

YAML

relevantTechniques:
- T1485
entityMappings:
- fieldMappings:
  - columnName: ActorUsername
    identifier: FullName
  - columnName: AccountName
    identifier: Name
  - columnName: AccountNTDomain
    identifier: NTDomain
  entityType: Account
- fieldMappings:
  - columnName: Dvc
    identifier: FullName
  - columnName: HostName
    identifier: HostName
  - columnName: HostNameDomain
    identifier: DnsDomain
  entityType: Host
- fieldMappings:
  - columnName: DvcIpAddr
    identifier: Address
  entityType: IP
triggerThreshold: 0
description: |
  'This query looks for the Sdelete process being run recursively after being deployed to a host via GPO. Attackers could use this technique to deploy Sdelete to multiple host and delete data on them.
    This query uses the Advanced Security Information Model. Parsers will need to be deployed before use: https://docs.microsoft.com/azure/sentinel/normalization'  
metadata:
  author:
    name: Microsoft Security Research
  source:
    kind: Community
  categories:
    domains:
    - Security - Threat Protection
  support:
    tier: Community
requiredDataConnectors: []
triggerOperator: gt
version: 1.0.6
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/SdeletedeployedviaGPOandrunrecursively(ASIMVersion).yaml
id: 30c8b802-ace1-4408-bc29-4c5c5afb49e1
queryFrequency: 1d
query: |
  _Im_ProcessEvent
  | where EventType =~ "ProcessCreated"
  | where Process endswith "svchost.exe"
  | where CommandLine has "-k GPSvcGroup" or CommandLine has "-s gpsvc"
  | extend timekey = bin(TimeGenerated, 1m)
  | project timekey, ActingProcessId, Dvc
  | join kind=inner (
    _Im_ProcessEvent
    | where EventType =~ "ProcessCreated"
    | where Process =~ "sdelete.exe" or CommandLine has "sdelete"
    | where ActingProcessName endswith "svchost.exe"
    | where CommandLine has_all ("-s", "-r")
    | extend timekey = bin(TimeGenerated, 1m)
    ) 
    on $left.ActingProcessId == $right.ParentProcessId, timekey, Dvc
  | extend AccountName = tostring(split(ActorUsername, @'\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\')[0])
  | extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
  | project-away DomainIndex  
severity: Medium
kind: Scheduled
queryPeriod: 1d
name: Sdelete deployed via GPO and run recursively (ASIM Version)
tactics:
- Impact
tags:
-

ARM