Detection rules › Sigma
Hidden Powershell in Link File Pattern
Detects events that appear when a user click on a link file with a powershell command in it
Known false positives
- Legitimate commands in .lnk files
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: Hidden Powershell in Link File Pattern
id: 30e92f50-bb5a-4884-98b5-d20aa80f3d7a
status: test
description: Detects events that appear when a user click on a link file with a powershell command in it
references:
- https://www.x86matthew.com/view_post?id=embed_exe_lnk
author: frack113
date: 2022-02-06
tags:
- attack.execution
- attack.t1059.001
logsource:
category: process_creation
product: windows
detection:
selection:
ParentImage: C:\Windows\explorer.exe
Image: C:\Windows\System32\cmd.exe
CommandLine|contains|all:
- 'powershell'
- '.lnk'
condition: selection
falsepositives:
- Legitimate commands in .lnk files
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
ParentImage: C:\Windows\explorer.exe
Image: C:\Windows\System32\cmd.exe
CommandLine|contains|all:
- 'powershell'
- '.lnk'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |
Image | eq |
| field:"Image" kind:eq value:"C:\Windows\System32\cmd.exe" |
ParentImage | eq |
| field:"ParentImage" kind:eq value:"C:\Windows\explorer.exe" |