Suspicious Speech Runtime Binary Child Process

SIGMA detection rule by andrewdanis · GPL-2.0

Detects suspicious Speech Runtime Binary Execution by monitoring its child processes. Child processes spawned by SpeechRuntime.exe could indicate an attempt for lateral movement via COM & DCOM hijacking.

title: Suspicious Speech Runtime Binary Child Process
id: 6fe12769-d53d-732b-a087-299018034ba9
related:
    - id: 78f10490-f2f4-4d19-a75b-4e0683bf3b8d
      type: derived
status: experimental
description: |
    Detects suspicious Speech Runtime Binary Execution by monitoring its child processes.
    Child processes spawned by SpeechRuntime.exe could indicate an attempt for lateral movement via COM & DCOM hijacking.
references:
    - https://github.com/rtecCyberSec/SpeechRuntimeMove
author: andrewdanis
date: 2025-10-23
logsource:
    category: process_creation
    product: windows
tags:
    - attack.lateral-movement
    - attack.stealth
    - attack.t1021.003
    - attack.t1218
detection:
    process_creation:
        EventID: 4688
        Channel: Security
    selection:
        ParentProcessName|endswith: \SpeechRuntime.exe
    condition: process_creation and selection
falsepositives:
    - Unlikely.
level: high
ruletype: Sigma

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

d31ea4b8-5c28-46fe-bd4d-3d725f6043c7

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

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Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

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What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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