title: ProtocolHandler.exe Downloaded Suspicious File
author: frack113
date: 2021/07/13
description: Emulates attack via documents through protocol handler in Microsoft Office.
    On successful execution you should see Microsoft Word launch a blank file.
detection:
    SELECTION_1:
        EventID: 1
    SELECTION_2:
        Image: '*\protocolhandler.exe'
    SELECTION_3:
        CommandLine: '*"ms-word*'
    SELECTION_4:
        CommandLine: '*.docx"*'
    condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4)
falsepositives:
- Unknown
fields:
- ComputerName
- User
- CommandLine
- ParentCommandLine
id: 104cdb48-a7a8-4ca7-a453-32942c6e5dcb
level: medium
logsource:
    category: process_creation
    product: windows
references:
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218/T1218.md
status: experimental
tags:
- attack.defense_evasion
- attack.t1218
yml_filename: process_creation_protocolhandler_suspicious_file.yml
yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation