Potential Chrome Frame Helper DLL Sideloading — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems), Wietze Beukema (project and research). Source status: test; severity: medium. Source dates: 2022-08-17 / 2023-05-15.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 6c8910af47bc4a37746ae6cabaf9da8bb5c404be0f94e81e7d57129c33a92f12

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: Potential Chrome Frame Helper DLL Sideloading
id: 72ca7c75-bf85-45cd-aca7-255d360e423c
status: test
description: Detects potential DLL sideloading of "chrome_frame_helper.dll"
references:
    - https://hijacklibs.net/entries/3rd_party/google/chrome_frame_helper.html
author: Nasreddine Bencherchali (Nextron Systems), Wietze Beukema (project and research)
date: 2022-08-17
modified: 2023-05-15
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: image_load
    product: windows
detection:
    selection:
        ImageLoaded|endswith: '\chrome_frame_helper.dll'
    filter_main_path:
        ImageLoaded|startswith:
            - 'C:\Program Files\Google\Chrome\Application\'
            - 'C:\Program Files (x86)\Google\Chrome\Application\'
    filter_optional_user_path:
        ImageLoaded|contains: '\AppData\local\Google\Chrome\Application\'
    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://hijacklibs.net/entries/3rd_party/google/chrome_frame_helper.html