detect_silence_Downloader
YARA-2022-0004
Medium
general
Active
detect_silence_Downloader
detect_silence_Downloader.yar
Valid Syntax
rule detect_silence_Downloader: silence Downloader
{
meta:
description = "detect_silence_Downloader"
author = "@malgamy12"
date = "8/11/2022"
license = "DRL 1.1"
sample1 = "BAE2737C39C0DEF9603EF9E6CD4921BF641FAB91"
sample2 = "A7421FDA552316FD89FA545D1815DE0AF8EC2858"
strings:
$intel = "IntelSofts" ascii
$s1 = "MicrosoftUpdte" ascii
$s2 = "php?name=" ascii
$s3 = "SoftWare\\Microsoft\\Windows\\CurrentVersion\\Run" ascii
$s4 = "ShellExecuteA" ascii
$s5 = "InternetOpenA" ascii
$s6 = "CreateFileA" ascii
$s7 = "CreateProcessA" ascii
condition:
uint16(0) == 0x5A4D and $intel or (6 of ($s*))
}
Rule Metadata
description
detect_silence_Downloader
author
@malgamy12
date
8/11/2022
license
DRL 1.1
sample1
BAE2737C39C0DEF9603EF9E6CD4921BF641FAB91
sample2
A7421FDA552316FD89FA545D1815DE0AF8EC2858
Tags
silence
Downloader
String Definitions
{"name":"$intel","value":"\"IntelSofts\" ascii"}
{"name":"$s1","value":"\"MicrosoftUpdte\" ascii"}
{"name":"$s2","value":"\"php?name=\" ascii"}
{"name":"$s3","value":"\"SoftWare\\\\Microsoft\\\\Windows\\\\CurrentVersion\\\\Run\" ascii"}
{"name":"$s4","value":"\"ShellExecuteA\" ascii"}
{"name":"$s5","value":"\"InternetOpenA\" ascii"}
{"name":"$s6","value":"\"CreateFileA\" ascii"}
{"name":"$s7","value":"\"CreateProcessA\" ascii"}
Threat Analysis
This YARA rule is designed to detect general threats.
Severity Level: Medium
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 detect_silence_Downloader.yar /path/to/suspicious/file # Scan a directory recursively yara -r detect_silence_Downloader.yar /path/to/directory/ # Scan with metadata output yara -m detect_silence_Downloader.yar target_file # Scan process memory (Linux) yara detect_silence_Downloader.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='detect_silence_Downloader.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=detect_silence_Downloader.yar /path/to/scan
Rule Information
YARA ID
YARA-2022-0004
Author
Repository
Created
August 19, 2025
Last Updated
August 19, 2025
Last Imported
Never
Threat Intelligence
Risk Level
Medium
Category
general
Detection Confidence
Analysis Pending
False Positive Rate
Not Available
Last Seen in Wild
No Data
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