Potential Iviewers.DLL Sideloading — Sigma Rule

Rule metadata and linked tags

Author: X__Junior (Nextron Systems). Source status: test; severity: high. Source dates: 2023-03-21 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: e26a30ebfd5c056ec34568b34bc96a0b3de22b51b2cda56e7da31f61cc037565

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 Iviewers.DLL Sideloading
id: 4c21b805-4dd7-469f-b47d-7383a8fcb437
status: test
description: Detects potential DLL sideloading of "iviewers.dll" (OLE/COM Object Interface Viewer)
references:
    - https://www.secureworks.com/research/shadowpad-malware-analysis
author: X__Junior (Nextron Systems)
date: 2023-03-21
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: image_load
    product: windows
detection:
    selection:
        ImageLoaded|endswith: '\iviewers.dll'
    filter:
        ImageLoaded|startswith:
            - 'C:\Program Files (x86)\Windows Kits\'
            - 'C:\Program Files\Windows Kits\'
    condition: selection and not filter
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.secureworks.com/research/shadowpad-malware-analysis