Hangover2_backdoor_shell
YARA-2025-1661
High
general
Active
No description available for this rule
Hangover2_backdoor_shell.yar
Valid Syntax
rule Hangover2_backdoor_shell {
meta:
author = "Alienvault Labs"
reference = "https://www.alienvault.com/blogs/labs-research/microsoft-office-zeroday-used-to-attack-pakistani-targets"
strings:
$a = "Shell started at: " wide ascii
$b = "Shell closed at: " wide ascii
$c = "Shell is already closed!" wide ascii
$d = "Shell is not Running!" wide ascii
condition:
all of them
}Rule Metadata
author
Alienvault Labs
reference
https://www.alienvault.com/blogs/labs-research/microsoft-office-zeroday-used-to-attack-pakistani-targets
String Definitions
{"name":"$a","value":"\"Shell started at: \" wide ascii"}
{"name":"$b","value":"\"Shell closed at: \" wide ascii"}
{"name":"$c","value":"\"Shell is already closed!\" wide ascii"}
{"name":"$d","value":"\"Shell is not Running!\" wide ascii"}
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 Hangover2_backdoor_shell.yar /path/to/suspicious/file # Scan a directory recursively yara -r Hangover2_backdoor_shell.yar /path/to/directory/ # Scan with metadata output yara -m Hangover2_backdoor_shell.yar target_file # Scan process memory (Linux) yara Hangover2_backdoor_shell.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='Hangover2_backdoor_shell.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=Hangover2_backdoor_shell.yar /path/to/scan
Rule Information
YARA ID
YARA-2025-1661
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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