Detection rules › Sigma
Potential PowerShell Obfuscation Via WCHAR/CHAR
Detects suspicious encoded character syntax often used for defense evasion
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1059.001 Command and Scripting Interpreter: PowerShell |
| Stealth | T1027 Obfuscated Files or Information |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
title: Potential PowerShell Obfuscation Via WCHAR/CHAR
id: e312efd0-35a1-407f-8439-b8d434b438a6
status: test
description: Detects suspicious encoded character syntax often used for defense evasion
references:
- https://twitter.com/0gtweet/status/1281103918693482496
author: Florian Roth (Nextron Systems)
date: 2020-07-09
modified: 2025-03-03
tags:
- attack.execution
- attack.stealth
- attack.t1059.001
- attack.t1027
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine|contains:
- '[char]0x'
- '(WCHAR)0x'
condition: selection
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
CommandLine|contains:
- '[char]0x'
- '(WCHAR)0x'
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 |
|---|---|---|
CommandLine | match |
|