Detection rules › Sigma
Invoke-Obfuscation Via Use Clip - Powershell
Detects Obfuscated Powershell via use Clip.exe in Scripts
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| PowerShell | Event ID 4104: Creating Scriptblock text (MessageNumber of MessageTotal). |
Rule body
title: Invoke-Obfuscation Via Use Clip - Powershell
id: db92dd33-a3ad-49cf-8c2c-608c3e30ace0
status: test
description: Detects Obfuscated Powershell via use Clip.exe in Scripts
references:
- https://github.com/SigmaHQ/sigma/issues/1009 # (Task29)
author: Nikita Nazarov, oscd.community
date: 2020-10-09
modified: 2024-04-15
tags:
- attack.stealth
- attack.t1027
- attack.execution
- attack.t1059.001
logsource:
product: windows
category: ps_script
definition: 'Requirements: Script Block Logging must be enabled'
detection:
selection_4104:
ScriptBlockText|re: '(?i)echo.*clip.*&&.*(Clipboard|i`?n`?v`?o`?k`?e`?)'
condition: selection_4104
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selection_4104Stage 1: selection_4104
selection_4104:
ScriptBlockText|re: '(?i)echo.*clip.*&&.*(Clipboard|i`?n`?v`?o`?k`?e`?)'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
ScriptBlockText | regex_match |
| field:"ScriptBlockText" kind:regex_match value:"(?i)echo.*clip.*&&.*(Clipboard|i`?n`?v`?o`?k`?e`?)" |