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
Shape the rule before it leaves Phoenix
Tune Translation
Active Rule
Potential Persistence Via Microsoft Office Add-In
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Potential Persistence Via Microsoft Office Add-In
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: Potential Persistence Via Microsoft Office Add-In
id: 8e1cb247-6cf6-42fa-b440-3f27d57e9936
status: test
description: Detects potential persistence activity via startup add-ins that load when Microsoft Office starts (.wll/.xll are simply .dll fit for Word or Excel).
references:
- Internal Research
- https://labs.withsecure.com/publications/add-in-opportunities-for-office-persistence
- https://github.com/redcanaryco/atomic-red-team/blob/4ae9580a1a8772db87a1b6cdb0d03e5af231e966/atomics/T1137.006/T1137.006.md
author: NVISO
date: 2020-05-11
modified: 2023-02-08
tags:
- attack.persistence
- attack.t1137.006
logsource:
category: file_event
product: windows
detection:
selection_wlldropped:
TargetFilename|contains: '\Microsoft\Word\Startup\'
TargetFilename|endswith: '.wll'
selection_xlldropped:
TargetFilename|contains: '\Microsoft\Excel\Startup\'
TargetFilename|endswith: '.xll'
selection_xladropped:
TargetFilename|contains: 'Microsoft\Excel\XLSTART\'
TargetFilename|endswith: '.xlam'
selection_generic:
TargetFilename|contains: '\Microsoft\Addins\'
TargetFilename|endswith:
- '.xlam'
- '.xla'
- '.ppam'
condition: 1 of selection_*
falsepositives:
- Legitimate add-ins
level: high
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_office_addin_persistence.yml