Unsuspecting cryptocurrency users have lost over $4 million to phishing websites promoted using Google Ads.
Data from Google Ads coupled with blockchain analytics reveals that over $4 million has been stolen from users that have fallen for malicious phishing websites promoted on Google.
According to Web3 anti-scam service provider ScamSniffer, malicious adverts for phishing websites have been prevalent on Google ads searches in recent weeks. The URLs lead to fraudulent websites that prompt wallet login signature requests that compromise users’ addresses.
1/ A recent surge in phishing scams via Google search ads has led to users losing approximately $4 million.
— Scam Sniffer (@realScamSniffer) April 27, 2023
ScamSniffer has investigated multiple cases where users clicked on malicious ads and were directed to fraudulent websites.#PhishingScams #GoogleAds pic.twitter.com/vuKCgSuFnV
A number of decentralized finance (DeFi) protocols, websites and brands, including Zapper.fi, Lido, Stargate, Defillama, Orbiter Finance and Radiant, have been targeted by scammers. Slight changes to official URLs make it difficult for users to identify that they’ve clicked on malicious links.
Analysis of metadata from a number of the phishing websites in question has been linked to advertisers located in Ukraine and Canada. The users responsible for placing the malicious adverts make use of a number of methods to bypass Google’s ad review process. This includes manipulating the Google Click ID parameter, which allows the attackers to show a normal webpage during Google’s ad review.
Related: Crypto phishing attacks up by 40% in one year: Kaspersky
Other malicious adverts use anti-debugging methods to redirect users with developer tools enabled to a normal website, while a direct click takes users to the malicious website. This also allows scammers to bypass some of Google ads’ machine reviews.
On-chain data analysis from addresses linked to malicious websites advertised on Google from ScamSniffer’s database suggests that $4.16 million has been stolen from over 3,000 users over the past month.
The anti-scam service followed on-chain flows of funds to various exchange and mixing services, including SimpleSwap, Tornado Cash, KuCoin and Binance.
Making use of advertising analysis platforms, ScamSniffer suggests that the cost of promoting crypto-related phishing websites is lucrative. The average cost per click for associated keywords is between $1 to $2.
Estimating a conversion rate of 40% from 7,500 users clicking on malicious adverts, scammers have spent around $15,000 on advertising which has provided a return on their malevolent investments of 276%, given the $4 million stolen to date.
A report from Russian cybersecurity and anti-virus provider Kaspersky highlighted an increase in crypto-related phishing attacks through 2022, up 40% year on year with over 5 million phishing attacks identified last year.
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