Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
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Indexed Rules
3,707
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Backends
17
Live from sigconverter.io
CLI Versions
10
Newest: 2.0.2
Translation Workspace
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Active Rule
Suspicious Rundll32 Execution With Image Extension
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Suspicious Rundll32 Execution With Image 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: Suspicious Rundll32 Execution With Image Extension
id: 4aa6040b-3f28-44e3-a769-9208e5feb5ec
related:
- id: 089fc3d2-71e8-4763-a8a5-c97fbb0a403e
type: similar
status: test
description: Detects the execution of Rundll32.exe with DLL files masquerading as image files
references:
- https://www.zscaler.com/blogs/security-research/onenote-growing-threat-malware-distribution
author: Hieu Tran
date: 2023-03-13
tags:
- attack.defense-evasion
- attack.t1218.011
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith: '\rundll32.exe'
- OriginalFileName: 'RUNDLL32.exe'
selection_cli:
CommandLine|contains:
- '.bmp'
- '.cr2'
- '.eps'
- '.gif'
- '.ico'
- '.jpeg'
- '.jpg'
- '.nef'
- '.orf'
- '.png'
- '.raw'
- '.sr2'
- '.tif'
- '.tiff'
condition: all of selection_*
falsepositives:
- Unknown
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_rundll32_susp_execution_with_image_extension.yml