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 | 1.0.5 |
Arm template | 30c8b802-ace1-4408-bc29-4c5c5afb49e1.json |
imProcess
| 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 (
imProcess
| 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
relevantTechniques:
- T1485
queryFrequency: 1d
kind: Scheduled
version: 1.0.5
metadata:
support:
tier: Community
categories:
domains:
- Security - Threat Protection
author:
name: Microsoft Security Research
source:
kind: Community
name: Sdelete deployed via GPO and run recursively (ASIM Version)
triggerOperator: gt
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'
queryPeriod: 1d
query: |
imProcess
| 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 (
imProcess
| 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 == $right.ParentProcessId, timekey, Dvc
| extend AccountName = tostring(split(ActorUsername, @'\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\')[0])
| extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
| project-away DomainIndex
entityMappings:
- entityType: Account
fieldMappings:
- columnName: ActorUsername
identifier: FullName
- columnName: AccountName
identifier: Name
- columnName: AccountNTDomain
identifier: NTDomain
- entityType: Host
fieldMappings:
- columnName: Dvc
identifier: FullName
- columnName: HostName
identifier: HostName
- columnName: HostNameDomain
identifier: DnsDomain
- entityType: IP
fieldMappings:
- columnName: DvcIpAddr
identifier: Address
tactics:
- Impact
tags:
-
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/SdeletedeployedviaGPOandrunrecursively(ASIMVersion).yaml
id: 30c8b802-ace1-4408-bc29-4c5c5afb49e1
requiredDataConnectors: []
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2023-02-01-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": "imProcess\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 imProcess\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",
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Impact"
],
"tags": [
null
],
"techniques": [
"T1485"
],
"templateVersion": "1.0.5",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}