Backdoored_ssh
YARA-2025-0765
High
general
Active
No description available for this rule
Backdoored_ssh.yar
Valid Syntax
rule Backdoored_ssh {
meta:
author = "Kaspersky"
reference = "https://securelist.com/energetic-bear-crouching-yeti/85345/"
actor = "Energetic Bear/Crouching Yeti"
strings:
$a1 = "OpenSSH"
$a2 = "usage: ssh"
$a3 = "HISTFILE"
condition:
uint32(0) == 0x464c457f and filesize<1000000 and all of ($a*)
}
Rule Metadata
author
Kaspersky
reference
https://securelist.com/energetic-bear-crouching-yeti/85345/
actor
Energetic Bear/Crouching Yeti
String Definitions
{"name":"$a1","value":"\"OpenSSH\""}
{"name":"$a2","value":"\"usage: ssh\""}
{"name":"$a3","value":"\"HISTFILE\""}
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 Backdoored_ssh.yar /path/to/suspicious/file # Scan a directory recursively yara -r Backdoored_ssh.yar /path/to/directory/ # Scan with metadata output yara -m Backdoored_ssh.yar target_file # Scan process memory (Linux) yara Backdoored_ssh.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='Backdoored_ssh.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=Backdoored_ssh.yar /path/to/scan
Rule Information
YARA ID
YARA-2025-0765
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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