Potential ShellDispatch.DLL Sideloading — Sigma Rule

Rule metadata and linked tags

Author: X__Junior (Nextron Systems). Source status: test; severity: medium. Source dates: 2023-06-20 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: e8f8cf8e1124609799dcbf549829ef649f6bc38a364d25113fbb9455e837aac7

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 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

Original YAML and metadata in JSON

False positives

• Some installers may trigger some false positives

Source references

• https://www.hexacorn.com/blog/2023/06/07/this-lolbin-doesnt-exist/