Renamed Microsoft Teams Execution

Description

Detects the execution of a renamed Microsoft Teams binary.

Query · sigma

selection:
  OriginalFileName:
  - msteams.exe
  - teams.exe
filter_main_legit_names:
  Image|endswith:
  - \msteams.exe
  - \teams.exe
condition: selection and not 1 of filter_main_*

Known false positives

  • Unknown
Raw source Renamed Microsoft Teams Execution · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Renamed Microsoft Teams Execution
id: 88f46b67-14d4-4f45-ac2c-d66984f22191
status: test
description: Detects the execution of a renamed Microsoft Teams binary.
references:
    - Internal Research
author: Nasreddine Bencherchali (Nextron Systems)
date: 2024-07-12
tags:
    - attack.stealth
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

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