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
Suspicious Execution of Powershell with Base64
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Suspicious Execution of Powershell with Base64
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: Suspicious Execution of Powershell with Base64
id: fb843269-508c-4b76-8b8d-88679db22ce7
status: test
description: Commandline to launch powershell with a base64 payload
references:
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1059.001/T1059.001.md#atomic-test-20---powershell-invoke-known-malicious-cmdlets
- https://unit42.paloaltonetworks.com/unit42-pulling-back-the-curtains-on-encodedcommand-powershell-attacks/
- https://mikefrobbins.com/2017/06/15/simple-obfuscation-with-powershell-using-base64-encoding/
author: frack113
date: 2022-01-02
modified: 2023-01-05
tags:
- attack.execution
- attack.t1059.001
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- \powershell.exe
- \pwsh.exe
CommandLine|contains:
- ' -e '
- ' -en '
- ' -enc '
- ' -enco'
- ' -ec '
filter_encoding:
CommandLine|contains: ' -Encoding '
filter_azure:
ParentImage|contains:
- 'C:\Packages\Plugins\Microsoft.GuestConfiguration.ConfigurationforWindows\'
- '\gc_worker.exe'
condition: selection and not 1 of filter_*
falsepositives:
- Unknown
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_powershell_encode.yml