Here is how I've been able to replicate the same "behavior" showed at Atlas "prove" video.
Take a closer look when the balance page starts to show, and "error" appears at the page top, this specific error ONLY triggers when the website could not establish a connection to the HitBTC socket (as anyone can see at the code) So to test it, I've developed this in 30 minutes:
Step 1) Edit computer network hosts and add:
127.0.1.1 st.hitbtc.com
This will prevent the website to find the socket to account info, so the error will appear at the top of the balance page, as we can see here:
Step 2) Install any JS injection like "tampermonkey" and add the script to run at the balance pages:
// Removes the error message (https://imgur.com/ykCViVM)
$("div[class*=styles__alert]").remove()
// Set all balances to zero (as we can see at the video) (https://imgur.com/ggRzH6G)
$("div[class*=main-balance]").html("0");
$("div[class*=styles__cell__cash]:not(:first)").html("0");
// Update BTC and USDT balance (https://imgur.com/ggRzH6G)
$("div[class*=styles__cell__cash]:not(:first)").eq(0).html("1,862.39021193");
$("div[class*=styles__cell__cash]:not(:first)").eq(2).html("5,418,742.84");
So this shows how easily people can be fooled by these scams:
And here is a video of the execution: https://streamable.com/nrd3d