Detection rules › Sigma
Potential Iviewers.DLL Sideloading
Detects potential DLL sideloading of "iviewers.dll" (OLE/COM Object Interface Viewer)
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 7: Image loaded |
Rule body
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
Stages and Predicates
Stage 0: condition
selection and not filterStage 1: selection
selection:
ImageLoaded|endswith: '\iviewers.dll'
Stage 2: not filter
filter:
ImageLoaded|startswith:
- 'C:\Program Files (x86)\Windows Kits\'
- 'C:\Program Files\Windows Kits\'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
ImageLoaded | starts_with | C:\Program Files (x86)\Windows Kits\ | excludes:ImageLoaded field:"ImageLoaded" value:"C:\Program Files (x86)\Windows Kits\" |
ImageLoaded | starts_with | C:\Program Files\Windows Kits\ | excludes:ImageLoaded field:"ImageLoaded" value:"C:\Program Files\Windows Kits\" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
ImageLoaded | ends_with |
| field:"ImageLoaded" kind:ends_with value:"\iviewers.dll" |