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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

3,707

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Backends

Live from sigconverter.io

CLI Versions

Newest: 2.0.2

Translation Workspace

Shape the rule before it leaves Phoenix

Tune Translation

Active Rule

Amsi.DLL Load By Uncommon Process

sigma-cli version

Backend

Format

Target Profile

Splunk

Splunk SPL & tstats data model queries

Format Mode

Default

Plain SPL queries

Conversion Output

Amsi.DLL Load By Uncommon 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: Amsi.DLL Load By Uncommon Process
id: facd1549-e416-48e0-b8c4-41d7215eedc8
status: test
description: Detects loading of Amsi.dll by uncommon processes
references:
    - https://infosecwriteups.com/amsi-bypass-new-way-2023-d506345944e9
    - https://github.com/TheD1rkMtr/AMSI_patch
    - https://github.com/surya-dev-singh/AmsiBypass-OpenSession
author: frack113
date: 2023-03-12
modified: 2025-02-24
tags:
    - attack.defense-evasion
    - attack.impact
    - attack.t1490
    - detection.threat-hunting
logsource:
    category: image_load
    product: windows
detection:
    selection:
        ImageLoaded|endswith: '\amsi.dll'
    filter_main_exact:
        Image|endswith:
            - ':\Windows\explorer.exe'
            - ':\Windows\Sysmon64.exe'
    filter_main_generic:
        Image|contains:
            - ':\Program Files (x86)\'
            - ':\Program Files\'
            - ':\Windows\System32\'
            - ':\Windows\SysWOW64\'
            - ':\Windows\WinSxS\'
    filter_optional_defender:
        Image|contains: ':\ProgramData\Microsoft\Windows Defender\Platform\'
        Image|endswith: '\MsMpEng.exe'
    filter_main_dotnet:
        Image|contains:
            - ':\Windows\Microsoft.NET\Framework\'
            - ':\Windows\Microsoft.NET\Framework64\'
            - ':\Windows\Microsoft.NET\FrameworkArm\'
            - ':\Windows\Microsoft.NET\FrameworkArm64\'
        Image|endswith: '\ngentask.exe'
    filter_main_null:
        Image: null
    filter_main_empty:
        Image: ''
    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*
falsepositives:
    - Legitimate third party apps installed in "ProgramData" and "AppData" might generate some false positives. Apply additional filters accordingly
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/image_load/image_load_dll_amsi_uncommon_process.yml