Detection rules › Sigma
Renamed Microsoft Teams Execution
Detects the execution of a renamed Microsoft Teams binary.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth | No specific technique |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
Rule body
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
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_main_*Stage 1: selection
selection:
OriginalFileName:
- 'msteams.exe'
- 'teams.exe'
Stage 2: not filter_main_legit_names
filter_main_legit_names:
Image|endswith:
- '\msteams.exe'
- '\teams.exe'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
Image | ends_with | \msteams.exe | excludes:Image field:"Image" value:"\msteams.exe" |
Image | ends_with | \teams.exe | excludes:Image field:"Image" value:"\teams.exe" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
OriginalFileName | eq |
| field:"OriginalFileName" kind:eq |