Detection rules › Sigma
Renamed Vmnat.exe Execution
Detects renamed vmnat.exe or portable version that can be used for DLL side-loading
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
Rule body
title: Renamed Vmnat.exe Execution
id: 7b4f794b-590a-4ad4-ba18-7964a2832205
status: test
description: Detects renamed vmnat.exe or portable version that can be used for DLL side-loading
references:
- https://twitter.com/malmoeb/status/1525901219247845376
author: elhoim
date: 2022-09-09
modified: 2023-02-03
tags:
- attack.privilege-escalation
- attack.persistence
- attack.execution
- attack.stealth
- attack.t1574.001
logsource:
category: process_creation
product: windows
detection:
selection:
OriginalFileName: 'vmnat.exe'
filter_rename:
Image|endswith: 'vmnat.exe'
condition: selection and not 1 of filter_*
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_*Stage 1: selection
selection:
OriginalFileName: 'vmnat.exe'
Stage 2: not filter_rename
filter_rename:
Image|endswith: 'vmnat.exe'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
Image | ends_with | vmnat.exe | excludes:Image field:"Image" value:"vmnat.exe" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
OriginalFileName | eq |
| field:"OriginalFileName" kind:eq value:"vmnat.exe" |