Inside The Scammer's DApp
With Chrome Dev Tools , I was able to look inside the client code of https://u2e-free.com. This site is the scam dapp that drained all my USDT after my Coinbase Wallet granted them unlimited spending of my USDT. The site is a single-page web application written in Vue.js v2.6.12 and web3.js . Below is the tree view of the site. The application supports two different languages in its UI — English and Chinese, with English as the primary language. I concluded that English is the primary language because there are untranslated texts for the Chinese version as shown below. Next I will focus on the code that implements the Receive button. This is the most important action because it is what obtained the permission to spend unlimited USDT from victims' wallets. Below is the receive function that implements the action. The function above does the following: Obtain the USDT Contract Get the estim