OneNote.EXE Execution of Malicious Embedded Scripts — Sigma Rule

Rule metadata and linked tags

Author: @kostastsale. Source status: test; severity: high. Source dates: 2023-02-02 / not supplied.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 7de9483cb42ea286fd560d06982267ee87f99ee89f07b201fe2005df66959e57

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: OneNote.EXE Execution of Malicious Embedded Scripts
id: 84b1706c-932a-44c4-ae28-892b28a25b94
status: test
description: |
    Detects the execution of malicious OneNote documents that contain embedded scripts.
    When a user clicks on a OneNote attachment and then on the malicious link inside the ".one" file, it exports and executes the malicious embedded script from specific directories.
references:
    - https://bazaar.abuse.ch/browse/tag/one/
author: '@kostastsale'
date: 2023-02-02
tags:
    - attack.stealth
    - attack.t1218.001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\onenote.exe'
        Image|endswith:
            - '\cmd.exe'
            - '\cscript.exe'
            - '\mshta.exe'
            - '\powershell.exe'
            - '\pwsh.exe'
            - '\wscript.exe'
        CommandLine|contains:
            - '\exported\'
            - '\onenoteofflinecache_files\'
    condition: selection
falsepositives:
    - Unlikely
level: high

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• https://bazaar.abuse.ch/browse/tag/one/