What is Cryptojacking? How to perceive, fend off, recuperate from it?


Cryptojacking elucidation:

Cryptojacking is the unauthorized use of someone else’s computer to mine cryptocurrency. Hackers do this by either getting the victim to click on a malicious link in an email that loads crypto mining code on the computer or by infecting a website or online ad with JavaScript code that auto-executes once loaded in the victim’s browser.

Cryptojacking has become an increasingly popular way for bad actors to extract money from targets in the form of cryptocurrency. Cryptojacking takes a different approach, harnessing victims’ machines to “mine”: perform the computations necessary to update cryptocurrencies’ blockchains, creating new tokens and generating fees in the process. These new tokens and fees are deposited to wallets owned by the attacker, while the costs of mining – electricity and wear and tear to computers – are borne by the victim.

Real examples of cryptojacking:

There are few real crypto jacking that happened recently. Some of them are – While the world mourns the loss of an NBA legend, cybercriminals are, as expected, taking advantage of the tragedy. Researchers found a malicious HTML file posing as a Kobe Bryant wallpaper that contains a coin mining script.

One more example is the SpaceX CEO, Elon Musk consistently targeted by cryptojackers on twitter.

Cryptojacking is on the rise

With such serious bread behind that digital dough, of course cybercriminals wanted in. They even thought around the problem of the massive computer resources required — why invest in expensive equipment and processing chips when you can get other people’s computers to do the work for you?

In-browser cyptojacking is a very popular trick because it uses JavaScript to insert miners onto any machine that visits an infected website. The mining usually stops after you leave that website, but there were several attempts to spin up a new hidden browser window which continues mining even if you leave that web page. The miner hijacks your CPU (usually without your knowledge or consent) and redirects its power towards earning the next PoW. This takes advantage of not only your computer but also your electric bill. Worse, if forced to crank its full power for too long, your computer could overheat and you could see some programs malfunction. In the case of mobile devices, this can even lead to the destruction of the device by overheating its battery or greatly reducing the device’s lifespan.

How to perceive cryptojacking 

As with any other malware infection, there are some signs you may be able to notice on your own.

Symptoms of crypto-jacking 

  • High processor usage on your device
  • Sluggish or unusually slow response times
  • Overheating of your device

How to fend off cryptojacking

A strong internet security software suite can help block crypto jacking threats. In addition to using security software and educating yourself on crypto-jacking, you can also install ad-blocking or anti-crypto mining extensions on web browsers for an extra layer of protection. As always, be sure to remain wary of phishing emails, unknown attachments, and links.

 “Criminals even seem to prefer crypto-jacking to ransomware.”

Use a strong antivirus that protects against crypto-jacking by detecting all unsecured websites and blocking anything malicious, including crypto mining. Always make sure your Windows software is updated to prevent vulnerabilities like EternalBlue which can be used to spread crypto-mining attacks.

Tips to prevent Cryptojacking :

One must use strong software .

Install an ad-blocking or anti-crypto mining extension on web browsers.

Keep your web filtering tools up to date.

By using endpoint protection that is used to capable of detecting known crypto miners.

Maintain browser extensions.

Keep your web filtering tools up to date.

Use mobile device management (MDM) solution to better control what’s on users’ devices.

Train your help desk to look for signs of crypto mining. 

Monitor your own websites for crypto-mining code.

Stay abreast of crypto-jacking trends. 

Kill and block website-delivered scripts.

Update and purge browser extensions. Learn and adpt.


Stealing has moved from using a gun to using a computer. as long as cryptocurrencies have value, criminals will use computers to steal it. What crypto-jacking shows is that someone doesn’t even need to own cryptocurrency to be a victim