Potential DLL Sideloading Via DeviceEnroller.EXE — Sigma Rule

Rule metadata and linked tags

Author: @gott_cyber. Source status: test; severity: medium. Source dates: 2022-08-29 / 2023-02-04.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 692620a0e078b59491fb2d136e230e66d42f2fa3d758dcaabc164ef7e6bad824

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 DLL Sideloading Via DeviceEnroller.EXE
id: e173ad47-4388-4012-ae62-bd13f71c18a8
related:
    - id: ee4c5d06-3abc-48cc-8885-77f1c20f4451
      type: similar
status: test
description: |
    Detects the use of the PhoneDeepLink parameter to potentially sideload a DLL file that does not exist. This non-existent DLL file is named "ShellChromeAPI.dll".
    Adversaries can drop their own renamed DLL and execute it via DeviceEnroller.exe using this parameter
references:
    - https://mobile.twitter.com/0gtweet/status/1564131230941122561
    - https://strontic.github.io/xcyclopedia/library/DeviceEnroller.exe-24BEF0D6B0ECED36BB41831759FDE18D.html
author: '@gott_cyber'
date: 2022-08-29
modified: 2023-02-04
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\deviceenroller.exe'
        - OriginalFileName: 'deviceenroller.exe'
    selection_cli:
        CommandLine|contains: '/PhoneDeepLink'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://mobile.twitter.com/0gtweet/status/1564131230941122561
• https://strontic.github.io/xcyclopedia/library/DeviceEnroller.exe-24BEF0D6B0ECED36BB41831759FDE18D.html