APT_Backdoor_PS1_BASICPIPESHELL_1
YARA-2025-0929
High
general
Active
No description available for this rule
APT_Backdoor_PS1_BASICPIPESHELL_1.yar
Valid Syntax
// Copyright 2020 by FireEye, Inc.
// You may not use this file except in compliance with the license. The license should have been received with this file. You may obtain a copy of the license at:
// https://github.com/fireeye/red_team_tool_countermeasures/blob/master/LICENSE.txt
import "pe"
rule APT_Backdoor_PS1_BASICPIPESHELL_1
{
meta:
author = "FireEye"
strings:
$s1 = "function Invoke-Client()" ascii nocase wide
$s2 = "function Invoke-Server" ascii nocase wide
$s3 = "Read-Host 'Enter Command:'" ascii nocase wide
$s4 = "new-object System.IO.Pipes.NamedPipeClientStream(" ascii nocase wide
$s5 = "new-object System.IO.Pipes.NamedPipeServerStream(" ascii nocase wide
$s6 = " = iex $" ascii nocase wide
condition:
all of them
}Rule Metadata
author
FireEye
String Definitions
{"name":"$s1","value":"\"function Invoke-Client()\" ascii nocase wide"}
{"name":"$s2","value":"\"function Invoke-Server\" ascii nocase wide"}
{"name":"$s3","value":"\"Read-Host 'Enter Command:'\" ascii nocase wide"}
{"name":"$s4","value":"\"new-object System.IO.Pipes.NamedPipeClientStream(\" ascii nocase wide"}
{"name":"$s5","value":"\"new-object System.IO.Pipes.NamedPipeServerStream(\" ascii nocase wide"}
{"name":"$s6","value":"\" = iex"}
Threat Analysis
This YARA rule is designed to detect general threats.
Severity Level: High
The rule uses pattern matching to identify specific byte sequences, strings, or behavioral patterns associated with malicious activity.
Detection Capabilities
- File-based detection for executables and documents
- Memory scanning for running processes
- Network traffic analysis support
Command Line Usage
# Scan a single file yara APT_Backdoor_PS1_BASICPIPESHELL_1.yar /path/to/suspicious/file # Scan a directory recursively yara -r APT_Backdoor_PS1_BASICPIPESHELL_1.yar /path/to/directory/ # Scan with metadata output yara -m APT_Backdoor_PS1_BASICPIPESHELL_1.yar target_file # Scan process memory (Linux) yara APT_Backdoor_PS1_BASICPIPESHELL_1.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='APT_Backdoor_PS1_BASICPIPESHELL_1.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=APT_Backdoor_PS1_BASICPIPESHELL_1.yar /path/to/scan
Rule Information
YARA ID
YARA-2025-0929
Author
Repository
Created
August 19, 2025
Last Updated
August 19, 2025
Last Imported
Never
Threat Intelligence
Risk Level
High
Category
general
Detection Confidence
Analysis Pending
False Positive Rate
Not Available
Last Seen in Wild
No Data
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