Sdelete deployed via GPO and run recursively ASIM Version
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 |
_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
version: 1.0.6
tags:
-
relevantTechniques:
- T1485
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'
requiredDataConnectors: []
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: ActorUsername
- identifier: Name
columnName: AccountName
- identifier: NTDomain
columnName: AccountNTDomain
entityType: Account
- fieldMappings:
- identifier: FullName
columnName: Dvc
- identifier: HostName
columnName: HostName
- identifier: DnsDomain
columnName: HostNameDomain
entityType: Host
- fieldMappings:
- identifier: Address
columnName: DvcIpAddr
entityType: IP
triggerThreshold: 0
id: 30c8b802-ace1-4408-bc29-4c5c5afb49e1
tactics:
- Impact
queryPeriod: 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 == $right.ParentProcessId, timekey, Dvc
| extend AccountName = tostring(split(ActorUsername, @'\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\')[0])
| extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
| project-away DomainIndex
severity: Medium
metadata:
categories:
domains:
- Security - Threat Protection
source:
kind: Community
support:
tier: Community
author:
name: Microsoft Security Research
name: Sdelete deployed via GPO and run recursively (ASIM Version)
kind: Scheduled
queryFrequency: 1d
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/SdeletedeployedviaGPOandrunrecursively(ASIMVersion).yaml
triggerOperator: gt
{
"$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/30c8b802-ace1-4408-bc29-4c5c5afb49e1')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/30c8b802-ace1-4408-bc29-4c5c5afb49e1')]",
"properties": {
"alertRuleTemplateName": "30c8b802-ace1-4408-bc29-4c5c5afb49e1",
"customDetails": null,
"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.\n This query uses the Advanced Security Information Model. Parsers will need to be deployed before use: https://docs.microsoft.com/azure/sentinel/normalization'\n",
"displayName": "Sdelete deployed via GPO and run recursively (ASIM Version)",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "ActorUsername",
"identifier": "FullName"
},
{
"columnName": "AccountName",
"identifier": "Name"
},
{
"columnName": "AccountNTDomain",
"identifier": "NTDomain"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "Dvc",
"identifier": "FullName"
},
{
"columnName": "HostName",
"identifier": "HostName"
},
{
"columnName": "HostNameDomain",
"identifier": "DnsDomain"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "DvcIpAddr",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/SdeletedeployedviaGPOandrunrecursively(ASIMVersion).yaml",
"query": "_Im_ProcessEvent\n| where EventType =~ \"ProcessCreated\"\n| where Process endswith \"svchost.exe\"\n| where CommandLine has \"-k GPSvcGroup\" or CommandLine has \"-s gpsvc\"\n| extend timekey = bin(TimeGenerated, 1m)\n| project timekey, ActingProcessId, Dvc\n| join kind=inner (\n _Im_ProcessEvent\n | where EventType =~ \"ProcessCreated\"\n | where Process =~ \"sdelete.exe\" or CommandLine has \"sdelete\"\n | where ActingProcessName endswith \"svchost.exe\"\n | where CommandLine has_all (\"-s\", \"-r\")\n | extend timekey = bin(TimeGenerated, 1m)\n ) \n on $left.ActingProcessId == $right.ParentProcessId, timekey, Dvc\n| extend AccountName = tostring(split(ActorUsername, @'\\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\\')[0])\n| extend HostName = tostring(split(Dvc, \".\")[0]), DomainIndex = toint(indexof(Dvc, '.'))\n| extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)\n| project-away DomainIndex\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"severity": "Medium",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Impact"
],
"tags": [
null
],
"techniques": [
"T1485"
],
"templateVersion": "1.0.6",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}