Detection rules › Sigma
Service permissions hijacked for privileges abuse (reg via command)
Detects scenarios where an attacker modify the permissions of a service in order to abuse its privileges
Known false positives
- administrator reconfiguring service
MITRE ATT&CK coverage
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: Service permissions hijacked for privileges abuse (reg via command)
description: Detects scenarios where an attacker modify the permissions of a service in order to abuse its privileges
references:
- https://github.com/mdecrevoisier/EVTX-to-MITRE-Attack/tree/master/TA0003-Persistence/T1543.003-Create%20or%20Modify%20System%20Process-Windows%20Service
- http://woshub.com/set-permissions-on-windows-service/
- https://www.winhelponline.com/blog/view-edit-service-permissions-windows/
- https://decoder.cloud/2019/02/07/demystifying-windows-service-permissions-configuration/
- https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.management/set-service?view=powershell-7.1
- https://medium.com/r3d-buck3t/abuse-service-registry-acls-windows-privesc-f88079140509
- https://github.com/rohnedwards/PowerShellAccessControl
tags:
- attack.persistence
- attack.t1543.003
- attack.t1574.010
author: mdecrevoisier
status: experimental
logsource:
product: windows
category: process_creation
detection:
selection:
EventID: 4688
NewProcessName|endswith: \reg.exe
CommandLine|contains: 'REG ADD'
CommandLine|re: '\\SYSTEM\\CurrentControlSet\\Services\\.*\\Security' # HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\xboxsvc\Security
condition: selection
falsepositives:
- administrator reconfiguring service
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
EventID: 4688
NewProcessName|endswith: \reg.exe
CommandLine|contains: 'REG ADD'
CommandLine|re: '\\SYSTEM\\CurrentControlSet\\Services\\.*\\Security'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match value:"REG ADD" |
CommandLine | regex_match |
| field:"CommandLine" kind:regex_match value:"\SYSTEM\CurrentControlSet\Services\.*\Security" |
NewProcessName | ends_with |
| field:"Image" kind:ends_with value:"\reg.exe" |