Domain Risk Scoring for Real-Time Malicious URL Filtering

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Solution Overview

Problem

Existing systems struggle to efficiently detect malicious domains without indicators of compromise, as many malicious domains are initially benign and weaponized over time, leading to inefficiencies in resource utilization and detection latency.

Innovation Solution

A machine-learning powered domain risk scoring system that prioritizes domains based on predicted risk levels, using features like crawled website content, registration history, and passive DNS data to identify higher-risk domains for real-time inline detection and classification.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If real-time inline detection and classification is performed on all domains, then detection accuracy and response time are improved, but system overhead and resource consumption increase significantly

Engineering Contradiction:
Improvedetection accuracyVSAvoidsystem overhead
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The system segments domains into different risk categories (high-risk and low-risk) based on machine learning predictions. High-risk domains undergo real-time inline detection and classification, while low-risk domains are processed through less resource-intensive methods. This segmentation allows the system to maintain high detection accuracy for malicious domains without subjecting all domains to expensive real-time analysis, thereby reducing overall system overhead.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The machine learning model performs preliminary risk assessment and classification of domains before they reach the inline detection system. By pre-filtering and prioritizing domains based on predicted risk levels, the system prepares high-risk domains for immediate attention while deferring low-risk domains to less critical processing stages. This preliminary action enables efficient resource allocation and reduces the burden on real-time detection systems.

Inventive Principle:
Principle #10Preliminary action

2Productivity

If resource allocation is distributed evenly across all domains, then comprehensive coverage is achieved, but detection efficiency and resource utilization deteriorate

Engineering Contradiction:
Improvedetection efficiencyVSAvoidresource utilization
Core Design Contradiction:
ProductivityVSQuantity of substance

Solution Approach 1:

The system applies different detection intensities and resource allocations to different domain categories based on their risk profiles. High-risk domains receive intensive real-time analysis with full resource deployment, while low-risk domains receive minimal processing resources. This local quality approach ensures that detection efficiency is maximized for the most critical domains without wasting resources on benign domains, achieving optimal resource utilization across the entire domain space.

Inventive Principle:
Principle #3Local quality

3Loss of time

If traditional detection methods are used without machine learning prioritization, then implementation simplicity is maintained, but detection latency and window of exposure increase

Engineering Contradiction:
Improvedetection latencyVSAvoidsystem complexity
Core Design Contradiction:
Loss of timeVSDevice complexity

Solution Approach 1:

The machine learning model performs preliminary risk assessment and classification of domains before they reach the inline detection system. By pre-filtering and prioritizing domains based on predicted risk levels, the system prepares high-risk domains for immediate attention while deferring low-risk domains to less critical processing stages. This preliminary action enables efficient resource allocation and reduces the burden on real-time detection systems.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS20250358300A1ML based domain risk scoring and its applications to advanced URL filtering
Publication Date: 2025.11.20 PALO ALTO NETWORKS INC
  • US20250358300A1 patent drawing
  • US20250358300A1 patent drawing
  • US20250358300A1 patent drawing

AI summary

The present application discloses a method, system, and computer system for providing real-time detection of malicious URLs based on a machine-learning powered domain risk scoring. The method includes (i) identifying a subset of higher risk websites, wherein the higher risk websites are at risk for potential malware injection or modification, and (ii) in response to identifying the subset of higher risk websites, performing an active measure based at least in part on the identified subset of higher risk websites.