Remote Thread Creation In Unusual Target Image (via create_remote_thread)

title: Remote Thread Creation In Unusual Target Image (via create_remote_thread)
id: 4715251a-cf43-5db5-a0e1-1815d661c3ad
status: stable
description: This rule detects uncommon target processes for remote thread creation
references:
    - https://attack.mitre.org/techniques/T1055/003/
    - https://web.archive.org/web/20220319032520/https://blog.redbluepurple.io/offensive-research/bypassing-injection-detection
author: Huntrule Team
date: 2026-01-21
tags:
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1055.003
logsource:
    product: windows
    category: create_remote_thread
detection:
    selection:
        TargetImage|endswith:
            - '\calc.exe'
            - '\calculator.exe'
            - '\mspaint.exe'
            - '\notepad.exe'
            - '\ping.exe'
            - '\sethc.exe'
            - '\spoolsv.exe'
            - '\wordpad.exe'
            - '\write.exe'
    filter_main_csrss:
        SourceImage: 'C:\Windows\System32\csrss.exe'
    filter_main_notepad:
        SourceImage:
            - 'C:\Windows\System32\explorer.exe'
            - 'C:\Windows\System32\OpenWith.exe'
        TargetImage: 'C:\Windows\System32\notepad.exe'
    filter_main_sethc:
        SourceImage: 'C:\Windows\System32\AtBroker.exe'
        TargetImage: 'C:\Windows\System32\Sethc.exe'
    filter_optional_aurora_1:
        StartFunction: 'EtwpNotificationThread'
    filter_optional_aurora_2:
        SourceImage|contains: 'unknown process'
    filter_optional_vmtoolsd:
        SourceImage: 'C:\Program Files\VMware\VMware Tools\vmtoolsd.exe'
        StartFunction: 'GetCommandLineW'
        TargetImage:
            - 'C:\Windows\System32\notepad.exe'
            - 'C:\Windows\System32\spoolsv.exe'
    filter_optional_xerox_pjems:
        SourceImage: 'C:\Program Files\Xerox\XeroxPrintExperience\CommonFiles\XeroxPrintJobEventManagerService.exe'
        StartFunction: 'LoadLibraryW'
        TargetImage: 'C:\Windows\System32\spoolsv.exe'
    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*
falsepositives:
    - Unknown
level: medium