Hub configuration

Name: Suspicious Service DACL Modification Via Set-Service Cmdlet
Author: sigmahq

More info

Suspicious Service DACL Modification Via Set-Service Cmdlet Detection Scenario by sigmahq | CrowdSec Hub

« Suspicious Service DACL Modification Via Set-Service Cmdlet »
v0.2 by sigmahq / proc_creation_win_powershell_service_dacl_modification_set_service
Attack scenariowindowsNot spoofableLow confidence

Detects suspicious DACL modifications via the "Set-Service" cmdlet using the "SecurityDescriptorSddl" flag (Only available with PowerShell 7) that can be used to hide services or make them unstopable

Installation

cscli scenarios install sigmahq/proc_creation_win_powershell_service_dacl_modification_set_service

YAML Configuration

1type: trigger
2name: sigmahq/proc_creation_win_powershell_service_dacl_modification_set_service
3description: |
4  Detects suspicious DACL modifications via the "Set-Service" cmdlet using the "SecurityDescriptorSddl" flag (Only available with PowerShell 7) that can be used to hide services or make them unstopable
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\pwsh.exe' || evt.Parsed.OriginalFileName == 'pwsh.dll') && (evt.Parsed.CommandLine contains '-SecurityDescriptorSddl ' || evt.Parsed.CommandLine contains '-sd ') && evt.Parsed.CommandLine contains 'Set-Service ' && evt.Parsed.CommandLine contains 'D;;' && (evt.Parsed.CommandLine contains ';;;IU' || evt.Parsed.CommandLine contains ';;;SU' || evt.Parsed.CommandLine contains ';;;BA' || evt.Parsed.CommandLine contains ';;;SY' || evt.Parsed.CommandLine contains ';;;WD'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1543.003
15
16  label: "Suspicious Service DACL Modification Via Set-Service Cmdlet"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24

Hub configuration

« Suspicious Service DACL Modification Via Set-Service Cmdlet »v0.2 by sigmahq / proc_creation_win_powershell_service_dacl_modification_set_serviceAttack scenariowindowsNot spoofableLow confidenceMITRE:t1543

« Suspicious Service DACL Modification Via Set-Service Cmdlet »
v0.2 by sigmahq / proc_creation_win_powershell_service_dacl_modification_set_service
Attack scenariowindowsNot spoofableLow confidence