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Attackers Target Crypto Wallets Using Codeless Webflow Phishing Pages

Oct 23 2024

Summary

From April to September 2024, Netskope Threat Labs tracked a 10-fold increase in traffic to phishing pages crafted through Webflow. The campaigns target sensitive information from different crypto wallets, including Coinbase, MetaMask, Phantom, Trezor, and Bitbuy, as well as login credentials for multiple company webmail platforms, as well as Microsoft365 login credentials. The campaigns have targeted more than 120 organizations worldwide, with the majority located in North America and Asia, across multiple segments led by financial services, banking, and technology. 

Attackers abuse Webflow in two ways: Creating standalone phishing pages and using Webflow pages to redirect victims to phishing pages hosted elsewhere. The former provides attackers stealth and ease because there are no phishing lines of code to write and detect, while the latter gives flexibility to the attacker to perform more complex actions as required. Webflow also provides custom publicly accessible subdomains without additional cost. 

Let’s take a closer look at these phishing and crypto scam campaigns.

Webflow abused to design phishing pages

Webflow is a visual website builder that allows a user to design websites through an intuitive drag-and-drop interface. Webflow comes with free tier access that provides a publicly accessible subdomain. While other apps, like Cloudflare R2 or Microsoft Sway, provide random alphanumeric subdomains, Webflow allows custom subdomains, which can be useful to trick victims.

Over the past seven months, we have seen a 10-fold increase in traffic to Webflow phishing pages. The phishing pages target crypto wallet information and login credentials. Some phishing pages use screenshots of the legitimate login pages to appear legitimate and either use Webflow’s link or form blocks to collect victim credentials. As of this writing, the Webflow phishing pages were reported and have been taken down.

Crafting phishing pages with Webflow

One of the challenges in creating phishing websites is ensuring they look identical to the legitimate page. The Webflow phishing and crypto scam campaigns solved this by taking a full-page screenshot of the legitimate app’s homepage and using it as its own homepage. Some phishing pages simply redirect you from this image to the actual phishing page hosted elsewhere. 

In other pages, attackers place link blocks on buttons that they entice their victims to click.

Building a phishing site without writing a line of code

Some of the phishing websites we investigated were more creative. They combined imagery from their target with Webflow’s form blocks. The form blocks allow the attacker to collect victims’ credentials directly in Webflow. By relying solely on Webflow, attackers can create phishing pages without writing any code at all.

Sample phishing page with an obscured company logo

To better understand and defend against these phishing scams, we replicated a phishing website using a Webflow free account. The phishing page we investigated consisted of two elements: a company logo image and a form block where the victim will enter their credentials. Without any prior knowledge of Webflow, we were able to create a phishing website within five minutes.

Phishing page creation using Webflow with an obscured company logo
Form data collected by Webflow

If the situation requires, Webflow also provides the means to redirect stolen credentials to a separate attacker-controlled website. Webform will forward the filled up form on the URL added on the submit button action field.

Crypto wallet phishing

Similar to credential phishing, we also identified Webflow crypto scam websites using a screenshot of a legitimate wallet homepage and used that image as its own phishing page. However unlike the phishing sites which used a button, the link blocks are set on the entirety of the image. This means whenever the victim clicks anywhere on the page, they will be redirected to the scam site.