Suspicious Execution of Renamed Microsoft Teams (via process_creation)

title: Suspicious Execution of Renamed Microsoft Teams (via process_creation)
id: 992e3364-9b52-5748-9bc2-d866bdb4086e
status: stable
description: This rule detects the execution of a renamed Microsoft Teams binary.
references:
    - Internal Research
author: Huntrule Team
date: 2026-04-12
tags:
    - attack.stealth
    - attack.defense-evasion
    - attack.t1036.003
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        OriginalFileName:
            - 'msteams.exe'
            - 'teams.exe'
    filter_main_legit_names:
        Image|endswith:
            - '\msteams.exe'
            - '\teams.exe'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: medium