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 local pySigma backend, then reveal pipelines only when you actually need them.
Indexed Rules
3,731
Ready to search
Backends
17
Loaded from pysigma-node
pySigma Versions
10
Newest: 1.3.3
Translation Workspace
Shape the rule before it leaves Phoenix
Tune Translation
Active Rule
PUA - NirCmd Execution
Target Profile
Splunk
Splunk through pysigma-backend-splunk.
Format Mode
Default
Default pySigma output mode for this backend.
Conversion Output
PUA - NirCmd Execution
Using Splunk · Default · pySigma 1.3.3
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion1.3.3
title: PUA - NirCmd Execution
id: 4e2ed651-1906-4a59-a78a-18220fca1b22
status: test
description: Detects the use of NirCmd tool for command execution, which could be the result of legitimate administrative activity
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_org:
- Image|endswith: '\NirCmd.exe'
- OriginalFileName: 'NirCmd.exe'
selection_cmd:
CommandLine|contains:
- ' execmd '
- '.exe script '
- '.exe shexec '
- ' runinteractive '
combo_exec:
CommandLine|contains:
- ' exec '
- ' exec2 '
combo_exec_params:
CommandLine|contains:
- ' show '
- ' hide '
condition: 1 of selection_* or all of combo_*
falsepositives:
- Legitimate use by administrators
level: medium
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.yml