sigmamediumHunting

Renamed Microsoft Teams Execution

Detects the execution of a renamed Microsoft Teams binary.

Detection Query

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

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2024-07-12

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Internal Research

Tags

attack.defense-evasion

Raw Content

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.defense-evasion
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