Detection rules › Sigma
Potential ShellDispatch.DLL Sideloading
Detects potential DLL sideloading of "ShellDispatch.dll"
Known false positives
- Some installers may trigger some false positives
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 7: Image loaded |
Rule body
title: Potential ShellDispatch.DLL Sideloading
id: 844f8eb2-610b-42c8-89a4-47596e089663
status: test
description: Detects potential DLL sideloading of "ShellDispatch.dll"
references:
- https://www.hexacorn.com/blog/2023/06/07/this-lolbin-doesnt-exist/
author: X__Junior (Nextron Systems)
date: 2023-06-20
tags:
- attack.persistence
- attack.privilege-escalation
- attack.execution
- attack.stealth
- attack.t1574.001
logsource:
category: image_load
product: windows
detection:
selection:
ImageLoaded|endswith: '\ShellDispatch.dll'
filter_main_legit_path:
- ImageLoaded|contains|all:
- ':\Users\'
- '\AppData\Local\Temp\'
- ImageLoaded|contains: ':\Windows\Temp\'
condition: selection and not 1 of filter_main_*
falsepositives:
- Some installers may trigger some false positives
level: medium
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_main_*Stage 1: selection
selection:
ImageLoaded|endswith: '\ShellDispatch.dll'
Stage 2: not filter_main_legit_path
filter_main_legit_path:
- ImageLoaded|contains|all:
- ':\Users\'
- '\AppData\Local\Temp\'
- ImageLoaded|contains: ':\Windows\Temp\'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
ImageLoaded | match | :\Users\ | excludes:ImageLoaded field:"ImageLoaded" value:":\Users\" |
ImageLoaded | match | \AppData\Local\Temp\ | excludes:ImageLoaded field:"ImageLoaded" value:"\AppData\Local\Temp\" |
ImageLoaded | match | :\Windows\Temp\ | excludes:ImageLoaded field:"ImageLoaded" value:":\Windows\Temp\" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
ImageLoaded | ends_with |
| field:"ImageLoaded" kind:ends_with value:"\ShellDispatch.dll" |