Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
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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
Network Connection Initiated By PowerShell Process
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Network Connection Initiated By PowerShell Process
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: Network Connection Initiated By PowerShell Process
id: 1f21ec3f-810d-4b0e-8045-322202e22b4b
status: test
description: |
Detects a network connection that was initiated from a PowerShell process.
Often times malicious powershell scripts download additional payloads or communicate back to command and control channels via uncommon ports or IPs.
Use this rule as a basis for hunting for anomalies.
references:
- https://www.youtube.com/watch?v=DLtJTxMWZ2o
author: Florian Roth (Nextron Systems)
date: 2017-03-13
modified: 2024-03-13
tags:
- attack.execution
- attack.t1059.001
- detection.threat-hunting
logsource:
category: network_connection
product: windows
detection:
selection:
Image|endswith:
- '\powershell.exe'
- '\pwsh.exe'
Initiated: 'true'
filter_main_local_ip:
DestinationIp|cidr:
- '127.0.0.0/8'
- '10.0.0.0/8'
- '169.254.0.0/16' # link-local address
- '172.16.0.0/12'
- '192.168.0.0/16'
- '::1/128' # IPv6 loopback
- 'fe80::/10' # IPv6 link-local addresses
- 'fc00::/7' # IPv6 private addresses
User|contains: # covers many language settings
- 'AUTHORI'
- 'AUTORI'
filter_main_msrange:
DestinationIp|cidr:
- '20.184.0.0/13'
- '51.103.210.0/23'
condition: selection and not 1 of filter_main_*
falsepositives:
- Administrative scripts
- Microsoft IP range
- Additional filters are required. Adjust to your environment (e.g. extend filters with company's ip range')
level: low
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-threat-hunting/windows/network_connection/net_connection_win_powershell_network_connection.yml