Netskope debuts as a Leader in the 2024 Gartner® Magic Quadrant™️ for Single-Vendor Secure Access Service Edge Get the report

close
close
  • Why Netskope chevron

    Changing the way networking and security work together.

  • Our Customers chevron

    Netskope serves more than 3,400 customers worldwide including more than 30 of the Fortune 100

  • Our Partners chevron

    We partner with security leaders to help you secure your journey to the cloud.

A Leader in SSE.
Now a Leader in Single-Vendor SASE.

Learn why Netskope debuted as a leader in the 2024 Gartner® Magic Quadrant™️ for Single-Vendor Secure Access Service Edge

Get the report
Customer Visionary Spotlights

Read how innovative customers are successfully navigating today’s changing networking & security landscape through the Netskope One platform.

Get the eBook
Customer Visionary Spotlights
Netskope’s partner-centric go-to-market strategy enables our partners to maximize their growth and profitability while transforming enterprise security.

Learn about Netskope Partners
Group of diverse young professionals smiling
Your Network of Tomorrow

Plan your path toward a faster, more secure, and more resilient network designed for the applications and users that you support.

Get the white paper
Your Network of Tomorrow
Introducing the Netskope One Platform

Netskope One is a cloud-native platform that offers converged security and networking services to enable your SASE and zero trust transformation.

Learn about Netskope One
Abstract with blue lighting
Embrace a Secure Access Service Edge (SASE) architecture

Netskope NewEdge is the world’s largest, highest-performing security private cloud and provides customers with unparalleled service coverage, performance and resilience.

Learn about NewEdge
NewEdge
Netskope Cloud Exchange

The Netskope Cloud Exchange (CE) provides customers with powerful integration tools to leverage investments across their security posture.

Learn about Cloud Exchange
Netskope video
The platform of the future is Netskope

Intelligent Security Service Edge (SSE), Cloud Access Security Broker (CASB), Cloud Firewall, Next Generation Secure Web Gateway (SWG), and Private Access for ZTNA built natively into a single solution to help every business on its journey to Secure Access Service Edge (SASE) architecture.

Go to Products Overview
Netskope video
Next Gen SASE Branch is hybrid — connected, secured, and automated

Netskope Next Gen SASE Branch converges Context-Aware SASE Fabric, Zero-Trust Hybrid Security, and SkopeAI-powered Cloud Orchestrator into a unified cloud offering, ushering in a fully modernized branch experience for the borderless enterprise.

Learn about Next Gen SASE Branch
People at the open space office
Designing a SASE Architecture For Dummies

Get your complimentary copy of the only guide to SASE design you’ll ever need.

Get the eBook
Make the move to market-leading cloud security services with minimal latency and high reliability.

Learn about NewEdge
Lighted highway through mountainside switchbacks
Safely enable the use of generative AI applications with application access control, real-time user coaching, and best-in-class data protection.

Learn how we secure generative AI use
Safely Enable ChatGPT and Generative AI
Zero trust solutions for SSE and SASE deployments

Learn about Zero Trust
Boat driving through open sea
Netskope achieves FedRAMP High Authorization

Choose Netskope GovCloud to accelerate your agency’s transformation.

Learn about Netskope GovCloud
Netskope GovCloud
  • Resources chevron

    Learn more about how Netskope can help you secure your journey to the cloud.

  • Blog chevron

    Learn how Netskope enables security and networking transformation through security service edge (SSE)

  • Events and Workshops chevron

    Stay ahead of the latest security trends and connect with your peers.

  • Security Defined chevron

    Everything you need to know in our cybersecurity encyclopedia.

Security Visionaries Podcast

The Convergence of CIO & CISO Roles
Join host Max Havey on the latest episode of Security Visionaries as he sits down with guest Jadee Hanson, CISO at Vanta.

Play the podcast
The Convergence of CIO & CISO Roles
Latest Blogs

Read how Netskope can enable the Zero Trust and SASE journey through security service edge (SSE) capabilities.

Read the blog
Sunrise and cloudy sky
SASE Week 2023: Your SASE journey starts now!

Replay sessions from the fourth annual SASE Week.

Explore sessions
SASE Week 2023
What is SASE?

Learn about the future convergence of networking and security tools in today’s cloud dominant business model.

Learn about SASE
  • Company chevron

    We help you stay ahead of cloud, data, and network security challenges.

  • Leadership chevron

    Our leadership team is fiercely committed to doing everything it takes to make our customers successful.

  • Customer Solutions chevron

    We are here for you and with you every step of the way, ensuring your success with Netskope.

  • Training and Certification chevron

    Netskope training will help you become a cloud security expert.

Supporting sustainability through data security

Netskope is proud to participate in Vision 2045: an initiative aimed to raise awareness on private industry’s role in sustainability.

Find out more
Supporting Sustainability Through Data Security
Thinkers, builders, dreamers, innovators. Together, we deliver cutting-edge cloud security solutions to help our customers protect their data and people.

Meet our team
Group of hikers scaling a snowy mountain
Netskope’s talented and experienced Professional Services team provides a prescriptive approach to your successful implementation.

Learn about Professional Services
Netskope Professional Services
Secure your digital transformation journey and make the most of your cloud, web, and private applications with Netskope training.

Learn about Training and Certifications
Group of young professionals working

Deep Learning for Phishing Website Detection

Nov 15 2022

Introduction

Phishing is one of the most common online security threats. A phishing website tries to mimic a legitimate page in order to obtain sensitive data such as usernames, passwords, or financial and health-related information from potential victims. 

Machine learning (ML) algorithms have been used to detect phishing websites, as a complementary approach to signature matching and heuristics. They usually rely on a set of “domain knowledge” features, for example, the number of days the security certificate in the header is valid, the number of domains under the certificate, the host information, etc. However, many of the domain knowledge features are not available for inline processing, and they can be easily circumvented by sophisticated attackers.

To address the shortcomings of the domain knowledge features and detect zero-day phishing attacks in real time, at Netskope we use the latest deep learning techniques to implicitly learn the patterns of phishing websites. This includes using deep learning-based encoders on the textual content of the HTML page, Javascript and CSS code. We have been awarded three U.S. patents (Patent # 11,336,689, 11,438,377 and 11,444,978) for our innovative approach to phishing detection. 

HTML Encoder

We have developed an HTML encoder to learn the proper representation of the entire HTML content (including the text body, Javascript, and CSS scripts) associated with the phishing detection use case. The HTML encoder is trained with the transformer-based deep learning architecture. This is inspired by the recent success of state-of-the-art language models, such as BERT and GPT transformer models. Similar to other transformer-based generative pre-training, we use a large number of web pages to train the HTML encoder in an unsupervised fashion. Unlike the BERT and GPT language models, however, the output of the HTML encoder is a two-dimensional ML-generated image. We chose the image output because phishing attacks are designed to use web pages that look similar to the real login pages. The ML-generated images appear to be effective in capturing features relevant to phishing and ignoring irrelevant parts of a web page. Below is an example of an HTML page and the corresponding ML-generated image from the HTML encoder.

The following GIF file shows more examples of the images generated by the HTML encoder. We should keep in mind that our objective is not to generate realistic images from the HTML content. Instead, it is to learn the suitable HTML representation that will be used to train the classification model for phishing detection.

Classification – phishing or not

Once we generate a suitable numerical representation (a vector of numbers) from the HTML content of a web page using the HTML encoder, we then combine it with the embedding of the URL string characters. The resulting numerical values are used as input features and fed into a neural network for final classification. We have collected millions of known phishing web pages and benign pages to train the binary classification model. Since we don’t keep the encoder parameters frozen, the HTML encoder will be fine-tuned toward phishing classification. The trained classifier will determine whether a new web page is phishing or not.

Netskope Threat Protection

The patented phishing website classifier is now part of Netskope Threat Protection, a comprehensive, multi-layered threat protection system powered by AI and machine learning. It enables us to block phishing web pages in real time, because it only needs the page URL string and the HTML content as input, which is readily available in the web traffic that goes through the Netskope secure access service edge (SASE) platform. The phishing classifier has the capability to detect unknown and zero-day phishing attacks, complementing other heuristic and signature-based engines. This classifier has been optimized to scan web pages inline, with an average runtime of less than 10 milliseconds.

To learn more about the multiple layers of threat capabilities that deliver comprehensive threat protection for cloud and web services, please visit Netskope Threat Protection.

The authors would like to acknowledge the significant contributions from Senior Research Scientist Najmeh Miramirkhani on this project. 

author image
Yihua Liao
Dr. Yihua Liao is the Head of AI Labs at Netskope. His team Develops cutting-edge AI/ML technology to tackle many challenging problems in cloud security, including data loss prevention, malware and threat protection, and user/entity behavior analytics. Previously, he led data science teams at Uber and Facebook.
author image
Ari Azarafrooz
Dr. Ari Azarafrooz has 8+ years experience of applying machine learning to network security problems. He has several publications in the top machine learning conferences of NeurIPS, ICML, ICLR and AAAI.

Stay informed!

Subscribe for the latest from the Netskope Blog