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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 Outlook Today Page
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Potential Persistence Via Outlook Today Page
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 Outlook Today Page
id: 487bb375-12ef-41f6-baae-c6a1572b4dd1
related:
- id: ddd171b5-2cc6-4975-9e78-f0eccd08cc76
type: similar
status: test
description: |
Detects potential persistence activity via outlook today page.
An attacker can set a custom page to execute arbitrary code and link to it via the registry values "URL" and "UserDefinedUrl".
references:
- https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=74
- https://trustedsec.com/blog/specula-turning-outlook-into-a-c2-with-one-registry-change
author: Tobias Michalski (Nextron Systems), David Bertho (@dbertho) & Eirik Sveen (@0xSV1), Storebrand
date: 2021-06-10
modified: 2024-08-07
tags:
- attack.defense-evasion
- attack.persistence
- attack.t1112
logsource:
product: windows
category: registry_set
detection:
selection_main:
TargetObject|contains|all:
- 'Software\Microsoft\Office\'
- '\Outlook\Today\'
selection_value_stamp:
TargetObject|endswith: '\Stamp'
Details: 'DWORD (0x00000001)'
selection_value_url:
TargetObject|endswith:
- '\URL'
- '\UserDefinedUrl'
filter_main_office:
Image|startswith:
- 'C:\Program Files\Common Files\Microsoft Shared\ClickToRun\'
- 'C:\Program Files\Common Files\Microsoft Shared\ClickToRun\Updates\'
Image|endswith: '\OfficeClickToRun.exe'
condition: selection_main and 1 of selection_value_* and not 1 of filter_main_*
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/registry/registry_set/registry_set_persistence_outlook_todaypage.yml