NK_GOLDBACKDOOR_obf_payload
YARA-2025-1291
High
general
Active
Detection for encoded shellcode payload downloaded by LNK file that drops GOLDBACKDOOR
NK_GOLDBACKDOOR_obf_payload.yar
Valid Syntax
rule NK_GOLDBACKDOOR_obf_payload
{
meta:
author= "Silas Cutler (silas@Stairwell.com)"
description = "Detection for encoded shellcode payload downloaded by LNK file that drops GOLDBACKDOOR"
reference = "https://stairwell.com/news/threat-research-the-ink-stained-trail-of-goldbackdoor/"
version = "0.1"
strings:
$init = { e6b3 6d0a 6502 1e67 0aee e7e6 e66b eac2 }
condition:
$init at 0
}
Rule Metadata
author
Silas Cutler (silas@Stairwell.com)
description
Detection for encoded shellcode payload downloaded by LNK file that drops GOLDBACKDOOR
reference
https://stairwell.com/news/threat-research-the-ink-stained-trail-of-goldbackdoor/
version
0.1
String Definitions
{"name":"$init","value":"{ e6b3 6d0a 6502 1e67 0aee e7e6 e66b eac2 }"}
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 NK_GOLDBACKDOOR_obf_payload.yar /path/to/suspicious/file # Scan a directory recursively yara -r NK_GOLDBACKDOOR_obf_payload.yar /path/to/directory/ # Scan with metadata output yara -m NK_GOLDBACKDOOR_obf_payload.yar target_file # Scan process memory (Linux) yara NK_GOLDBACKDOOR_obf_payload.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='NK_GOLDBACKDOOR_obf_payload.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=NK_GOLDBACKDOOR_obf_payload.yar /path/to/scan
Rule Information
YARA ID
YARA-2025-1291
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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