SigmaHQ/rules/windows/registry_event/sysmon_stickykey_like_backdoor.yml

action: global
title: Sticky Key Like Backdoor Usage
id: baca5663-583c-45f9-b5dc-ea96a22ce542
description: Detects the usage and installation of a backdoor that uses an option to register a malicious debugger for built-in tools that are accessible in the login
    screen
references:
    - https://blogs.technet.microsoft.com/jonathantrull/2016/10/03/detecting-sticky-key-backdoors/
tags:
    - attack.privilege_escalation
    - attack.persistence
    - attack.t1015 # an old one
    - attack.t1546.008
    - car.2014-11-003
    - car.2014-11-008
author: Florian Roth, @twjackomo, Jonhnathan Ribeiro, oscd.community
date: 2018/03/15
modified: 2020/11/28
falsepositives:
    - Unlikely
level: critical
---
logsource:
    category: registry_event
    product: windows
detection:
    selection_registry:
        TargetObject|endswith:
            - '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\sethc.exe\Debugger'
            - '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\utilman.exe\Debugger'
            - '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\osk.exe\Debugger'
            - '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Magnify.exe\Debugger'
            - '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Narrator.exe\Debugger'
            - '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\DisplaySwitch.exe\Debugger'
    condition: 1 of them
---
logsource:
    category: process_creation
    product: windows
detection:
    selection_process:
        ParentImage|endswith: '\winlogon.exe'
        Image|endswith: '\cmd.exe'
        CommandLine|contains:
            - 'sethc.exe'
            - 'utilman.exe'
            - 'osk.exe'
            - 'Magnify.exe'
            - 'Narrator.exe'
            - 'DisplaySwitch.exe'
    condition: 1 of them