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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.

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Indexed Rules

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Backends

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CLI Versions

Newest: 2.0.2

Translation Workspace

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Active Rule

Regsvr32 DLL Execution With Suspicious File Extension

sigma-cli version

Backend

Format

Target Profile

Splunk

Splunk SPL & tstats data model queries

Format Mode

Default

Plain SPL queries

Conversion Output

Regsvr32 DLL Execution With Suspicious File Extension

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: Regsvr32 DLL Execution With Suspicious File Extension
id: 089fc3d2-71e8-4763-a8a5-c97fbb0a403e
related:
    - id: 8e2b24c9-4add-46a0-b4bb-0057b4e6187d
      type: obsolete
status: test
description: Detects the execution of REGSVR32.exe with DLL files masquerading as other files
references:
    - https://thedfirreport.com/2021/11/29/continuing-the-bazar-ransomware-story/
    - https://blog.talosintelligence.com/2021/10/threat-hunting-in-large-datasets-by.html
    - https://guides.lib.umich.edu/c.php?g=282942&p=1885348
    - https://harfanglab.io/insidethelab/uac-0057-pressure-ukraine-poland/
author: Florian Roth (Nextron Systems), frack113
date: 2021-11-29
modified: 2025-08-27
tags:
    - attack.defense-evasion
    - attack.t1218.010
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\regsvr32.exe'
        - OriginalFileName: 'REGSVR32.EXE'
    selection_cli:
        CommandLine|endswith:
            # Add more image extensions
            # https://twitter.com/Max_Mal_/status/1542461200797163522/photo/3
            - '.bin'
            - '.bmp'
            - '.cr2'
            - '.dat'
            - '.eps'
            - '.gif'
            - '.ico'
            - '.jpeg'
            - '.jpg'
            - '.log'
            - '.nef'
            - '.orf'
            - '.png'
            - '.raw'
            - '.rtf'
            - '.sr2'
            - '.temp'
            - '.tif'
            - '.tiff'
            - '.tmp'
            - '.txt'
    condition: all of selection_*
falsepositives:
    - Unlikely
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_regsvr32_susp_extensions.yml