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
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Active Rule
Assembly DLL Creation Via AspNetCompiler
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Assembly DLL Creation Via AspNetCompiler
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: Assembly DLL Creation Via AspNetCompiler
id: 4c7f49ee-2638-43bb-b85b-ce676c30b260 # TMP File
related:
- id: 9ccba514-7cb6-4c5c-b377-700758f2f120 # SuspChild
type: similar
- id: 9f50fe98-fe5c-4a2d-86c7-fad7f63ed622 # Susp Paths
type: similar
- id: a01b8329-5953-4f73-ae2d-aa01e1f35f00 # Exec
type: similar
status: test
description: |
Detects the creation of new DLL assembly files by "aspnet_compiler.exe", which could be a sign of "aspnet_compiler" abuse to proxy execution through a build provider.
references:
- Internal Research
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-08-14
tags:
- attack.execution
logsource:
product: windows
category: file_event
detection:
selection:
Image|endswith: '\aspnet_compiler.exe'
TargetFilename|contains|all:
- '\Temporary ASP.NET Files\'
- '\assembly\tmp\'
- '.dll'
condition: selection
falsepositives:
- Legitimate assembly compilation using a build provider
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/file/file_event/file_event_win_aspnet_temp_files.yml