Hub configuration

Name: Deny Service Access Using Security Descriptor Tampering Via Sc.EXE
Author: sigmahq

More info

Deny Service Access Using Security Descriptor Tampering Via Sc.EXE Detection Scenario by sigmahq | CrowdSec Hub

« Deny Service Access Using Security Descriptor Tampering Via Sc.EXE »
v0.2 by sigmahq / proc_creation_win_sc_sdset_deny_service_access
Attack scenariowindowsNot spoofableLow confidence

Detects suspicious DACL modifications to deny access to a service that affects critical trustees. This can be used to hide services or make them unstoppable.

Installation

cscli scenarios install sigmahq/proc_creation_win_sc_sdset_deny_service_access

YAML Configuration

1type: trigger
2name: sigmahq/proc_creation_win_sc_sdset_deny_service_access
3description: |
4  Detects suspicious DACL modifications to deny access to a service that affects critical trustees. This can be used to hide services or make them unstoppable.
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\sc.exe' || evt.Parsed.OriginalFileName == 'sc.exe') && evt.Parsed.CommandLine contains 'sdset' && 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: "Deny Service Access Using Security Descriptor Tampering Via Sc.EXE"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24

Hub configuration

« Deny Service Access Using Security Descriptor Tampering Via Sc.EXE »v0.2 by sigmahq / proc_creation_win_sc_sdset_deny_service_accessAttack scenariowindowsNot spoofableLow confidenceMITRE:t1543

« Deny Service Access Using Security Descriptor Tampering Via Sc.EXE »
v0.2 by sigmahq / proc_creation_win_sc_sdset_deny_service_access
Attack scenariowindowsNot spoofableLow confidence