Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
This studio is built around Phoenix's own rule corpus, not a blank editor. Search by title or rule id, choose a live sigma-cli backend, then reveal pipelines only when you actually need them.
Indexed Rules
3,707
Ready to search
Backends
17
Live from sigconverter.io
CLI Versions
10
Newest: 2.0.2
Translation Workspace
Shape the rule before it leaves Phoenix
Tune Translation
Active Rule
PUA - NirCmd Execution As LOCAL SYSTEM
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
PUA - NirCmd Execution As LOCAL SYSTEM
Using Splunk · Default · sigma-cli 2.0.2
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion2.0.2
title: PUA - NirCmd Execution As LOCAL SYSTEM
id: d9047477-0359-48c9-b8c7-792cedcdc9c4
status: test
description: Detects the use of NirCmd tool for command execution as SYSTEM user
references:
- https://www.nirsoft.net/utils/nircmd.html
- https://www.winhelponline.com/blog/run-program-as-system-localsystem-account-windows/
- https://www.nirsoft.net/utils/nircmd2.html#using
author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
date: 2022-01-24
modified: 2023-02-13
tags:
- attack.execution
- attack.t1569.002
- attack.s0029
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine|contains: ' runassystem '
condition: selection
falsepositives:
- Legitimate use by administrators
level: high
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/process_creation/proc_creation_win_pua_nircmd_as_system.yml