Cova_malware
YARA-2023-0005
Medium
general
Active
Detect_Cova_malware
Cova_malware.yar
Valid Syntax
rule Cova_malware: Cova
{
meta:
description = "Detect_Cova_malware"
author = "@malgamy12"
date = "2023/1/9"
license = "DRL 1.1"
hash = "a1ae4a7440c7f2f0d03c6f2e05ff97b875e8295cf2b340b96fdda919af6c7eb5"
strings:
$s1 = "Release\\orval.pdb" ascii
$op1 = {49 8B C0 83 E0 ?? 8A 0C 04 43 32 0C 01 41 32 C8 43 88 0C 01 49 FF C0 4C 3B C2 72}
condition:
uint16(0) == 0x5A4D and all of them
}
Rule Metadata
description
Detect_Cova_malware
author
@malgamy12
date
2023/1/9
license
DRL 1.1
hash
a1ae4a7440c7f2f0d03c6f2e05ff97b875e8295cf2b340b96fdda919af6c7eb5
Tags
Cova
String Definitions
{"name":"$s1","value":"\"Release\\\\orval.pdb\" ascii"}
{"name":"$op1","value":"{49 8B C0 83 E0 ?? 8A 0C 04 43 32 0C 01 41 32 C8 43 88 0C 01 49 FF C0 4C 3B C2 72}"}
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 Cova_malware.yar /path/to/suspicious/file # Scan a directory recursively yara -r Cova_malware.yar /path/to/directory/ # Scan with metadata output yara -m Cova_malware.yar target_file # Scan process memory (Linux) yara Cova_malware.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='Cova_malware.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=Cova_malware.yar /path/to/scan
Rule Information
YARA ID
YARA-2023-0005
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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