BackdoorLiudoor
YARA-2015-0214
High
general
Active
No description available for this rule
BackdoorLiudoor.yar
Valid Syntax
rule BackdoorLiudoor
{
meta:
author = "RSA FirstWatch"
date = "2015-07-23"
Description = "Backdoor.Liudoor.sm"
ThreatLevel = "5"
hash0 = "78b56bc3edbee3a425c96738760ee406"
hash1 = "5aa0510f6f1b0e48f0303b9a4bfc641e"
hash2 = "531d30c8ee27d62e6fbe855299d0e7de"
hash3 = "2be2ac65fd97ccc97027184f0310f2f3"
hash4 = "6093505c7f7ec25b1934d3657649ef07"
type = "Win32 DLL"
strings:
$string0 = "Succ" ascii wide
$string1 = "Fail" ascii wide
$string2 = "pass" ascii wide
$string3 = "exit" ascii wide
$string4 = "svchostdllserver.dll" ascii wide
$string5 = "L$,PQR" ascii wide
$string6 = "0/0B0H0Q0W0k0" ascii wide
$string7 = "QSUVWh" ascii wide
$string8 = "Ht Hu[" ascii wide
condition:
all of them
}
Rule Metadata
author
RSA FirstWatch
date
2015-07-23
Description
Backdoor.Liudoor.sm
ThreatLevel
5
hash0
78b56bc3edbee3a425c96738760ee406
hash1
5aa0510f6f1b0e48f0303b9a4bfc641e
hash2
531d30c8ee27d62e6fbe855299d0e7de
hash3
2be2ac65fd97ccc97027184f0310f2f3
hash4
6093505c7f7ec25b1934d3657649ef07
type
Win32 DLL
String Definitions
{"name":"$string0","value":"\"Succ\" ascii wide"}
{"name":"$string1","value":"\"Fail\" ascii wide"}
{"name":"$string2","value":"\"pass\" ascii wide"}
{"name":"$string3","value":"\"exit\" ascii wide"}
{"name":"$string4","value":"\"svchostdllserver.dll\" ascii wide"}
{"name":"$string5","value":"\"L"}
{"name":"$string6","value":"\"0\/0B0H0Q0W0k0\" ascii wide"}
{"name":"$string7","value":"\"QSUVWh\" ascii wide"}
{"name":"$string8","value":"\"Ht Hu[\" ascii wide"}
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 BackdoorLiudoor.yar /path/to/suspicious/file # Scan a directory recursively yara -r BackdoorLiudoor.yar /path/to/directory/ # Scan with metadata output yara -m BackdoorLiudoor.yar target_file # Scan process memory (Linux) yara BackdoorLiudoor.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='BackdoorLiudoor.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=BackdoorLiudoor.yar /path/to/scan
Rule Information
YARA ID
YARA-2015-0214
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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