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Detection rules › Sigma

DLL Sideloading Of ShellChromeAPI.DLL

Status
test
Severity
high
Log source
product windows, category image_load
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects processes loading the non-existent DLL "ShellChromeAPI". One known example is the "DeviceEnroller" binary in combination with the "PhoneDeepLink" flag tries to load this DLL. Adversaries can drop their own renamed DLL and execute it via DeviceEnroller.exe using this parameter

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1574.001 Hijack Execution Flow: DLL
StealthT1574.001 Hijack Execution Flow: DLL

Event coverage

ProviderEventTitle
SysmonEvent ID 7Image loaded

Rule body yaml

title: DLL Sideloading Of ShellChromeAPI.DLL
id: ee4c5d06-3abc-48cc-8885-77f1c20f4451
related:
    - id: e173ad47-4388-4012-ae62-bd13f71c18a8
      type: similar
status: test
description: |
    Detects processes loading the non-existent DLL "ShellChromeAPI". One known example is the "DeviceEnroller" binary in combination with the "PhoneDeepLink" flag tries to load this 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: Nasreddine Bencherchali (Nextron Systems)
date: 2022-12-01
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: image_load
    product: windows
detection:
    selection:
        # The DLL shouldn't exist on Windows anymore. If for some reason you still have it. You could filter out legitimate calls
        ImageLoaded|endswith: '\ShellChromeAPI.dll'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    ImageLoaded|endswith: '\ShellChromeAPI.dll'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
ImageLoadedends_with
  • \ShellChromeAPI.dll