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 |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
Rule body yaml
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
Top-level NOT(...) conjuncts: predicates this rule actively suppresses.
| Field | Kind | Excluded values |
|---|---|---|
Image | ends_with | \msteams.exe |
Image | ends_with | \teams.exe |
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
OriginalFileName | eq |
|