Detection rules › Sigma
PowerShell Module File Created
Detects the creation of a new PowerShell module ".psm1", ".psd1", ".dll", ".ps1", etc.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | No specific technique |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 11 | FileCreate |
Rule body yaml
title: PowerShell Module File Created
id: e36941d0-c0f0-443f-bc6f-cb2952eb69ea
status: test
description: Detects the creation of a new PowerShell module ".psm1", ".psd1", ".dll", ".ps1", etc.
references:
- Internal Research
- https://learn.microsoft.com/en-us/powershell/scripting/developer/module/understanding-a-windows-powershell-module?view=powershell-7.3
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-09
tags:
- attack.persistence
logsource:
category: file_event
product: windows
detection:
selection:
Image|endswith:
- '\powershell.exe'
- '\pwsh.exe'
TargetFilename|contains:
- '\WindowsPowerShell\Modules\'
- '\PowerShell\7\Modules\'
condition: selection
falsepositives:
- Likely
level: low
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Image|endswith:
- '\powershell.exe'
- '\pwsh.exe'
TargetFilename|contains:
- '\WindowsPowerShell\Modules\'
- '\PowerShell\7\Modules\'
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 |
|---|---|---|
Image | ends_with |
|
TargetFilename | match |
|