Unusual Assistive Technology Applications Execution Through AtBroker.EXE (via process_creation)

title: Unusual  Assistive Technology Applications Execution Through AtBroker.EXE (via process_creation)
id: 600a8c36-37ea-5dae-9c8f-c4313c1e29e1
status: stable
description: This rule detects the start of a non built-in assistive technology applications via "Atbroker.EXE".
references:
    - https://attack.mitre.org/techniques/T1218/
    - http://www.hexacorn.com/blog/2016/07/22/beyond-good-ol-run-key-part-42/
    - https://lolbas-project.github.io/lolbas/Binaries/Atbroker/
author: Huntrule Team
date: 2026-07-20
tags:
    - attack.stealth
    - attack.t1218
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\AtBroker.exe'
        - OriginalFileName: 'AtBroker.exe'
    selection_cli:
        CommandLine|contains: 'start'
    filter_main_builtin:
        CommandLine|contains:
            - 'animations'
            - 'audiodescription'
            - 'caretbrowsing'
            - 'caretwidth'
            - 'colorfiltering'
            - 'cursorindicator'
            - 'cursorscheme'
            - 'filterkeys'
            - 'focusborderheight'
            - 'focusborderwidth'
            - 'highcontrast'
            - 'keyboardcues'
            - 'keyboardpref'
            - 'livecaptions'
            - 'magnifierpane'
            - 'messageduration'
            - 'minimumhitradius'
            - 'mousekeys'
            - 'Narrator'
            - 'osk'
            - 'overlappedcontent'
            - 'showsounds'
            - 'soundsentry'
            - 'speechreco'
            - 'stickykeys'
            - 'togglekeys'
            - 'voiceaccess'
            - 'windowarranging'
            - 'windowtracking'
            - 'windowtrackingtimeout'
            - 'windowtrackingzorder'
    filter_optional_java:
        CommandLine|contains: 'Oracle_JavaAccessBridge'
    condition: all of selection_* and not 1 of filter_main_* and not 1 of filter_optional_*
falsepositives:
    - Unknown
level: medium