Detection rules › Sigma
Run PowerShell Script from Redirected Input Stream
Detects PowerShell script execution via input stream redirect
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: Run PowerShell Script from Redirected Input Stream
id: c83bf4b5-cdf0-437c-90fa-43d734f7c476
status: test
description: Detects PowerShell script execution via input stream redirect
references:
- https://github.com/LOLBAS-Project/LOLBAS/blob/4db780e0f0b2e2bb8cb1fa13e09196da9b9f1834/yml/LOLUtilz/OSBinaries/Powershell.yml
- https://twitter.com/Moriarty_Meng/status/984380793383370752
author: Moriarty Meng (idea), Anton Kutepov (rule), oscd.community
date: 2020-10-17
modified: 2021-11-27
tags:
- attack.execution
- attack.t1059
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\powershell.exe'
- '\pwsh.exe'
CommandLine|re: '\s-\s*<'
condition: selection
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Image|endswith:
- '\powershell.exe'
- '\pwsh.exe'
CommandLine|re: '\s-\s*<'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | regex_match |
| field:"CommandLine" kind:regex_match value:"\s-\s*<" |
Image | ends_with |
| field:"Image" kind:ends_with |