What is Cryptojacking? And How to Protect Against Cryptomining Malware

As the digital era dawns, both angels and demons have come to inhabit a new cyber environment. Someone’s gotta win, and someone’s gotta make a quick buck.

Some people believe that tech is making crime easier. Do you agree? As far as the correlation is concerned between blockchain technology, cryptocurrency, cryptomining and cryptojacking, it does seem so. Blockchain technology has facilitated the creation of a new technological environment – it is the record-keeping technology behind the newest form of electronic money, cryptocurrency. And cryptomining is how that new currency is created – and stolen.

As a type of cybercrime, cryptojacking compromises the cyber security of both individuals and organizations. It can be done via malware installation, cryptojacking scripts or code insertion into web browsers. If the network within an organization suffers from cryptojacking, the CPU will be largely applied to that purpose, preventing its use for normal operations and costing resources (such as time and energy, i.e. money), and risks are introduced to your cyber security.

Then, what exactly is cryptojacking? How does it work? And what can we do to protect against it?

What Exactly Is Cryptojacking?

Before learning about cryptojacking, it’s necessary to understand the following terms:

Blockchain technology

Blockchain is a virtual and public record of all digital transactions stored in a safe and transparent way. Data on transactions is captured in an interconnected computer network (block) owned and operated by users on the chain.


A cryptocurrency is a virtual or digital currency that is designed to work as a medium of exchange. Being based on blockchain technology, it is a decentralized currency that makes use of cryptographic technology for security and verification purposes. Therefore, cryptocurrency is not regulated by any central authority, and it is immune to government control and interference. Bitcoin is the leading type of cryptocurrency.


Cryptomining is the procedure by which cryptocurrency transactions are added to the blockchain ledger. In itself, it is not evil, but rather a necessary part of the blockchain technology. As a cryptocurrency transaction occurs, a crypto miner will update the blockchain and verify that the information is true. Cryptominers must implement complex algorithms through high-performance computer servers and specialized hardware to do this, and they are incentivized by earning cryptocurrency as their profit.

Of course, this verification process – crypto mining – costs time and money if it’s done with your own computer. So some devious hackers out there had a genius idea: why not get someone else (or someone else’s computer) to do it for me… Well, that’s cryptojacking. Cryptojacking is a type of malicious cryptomining. When a cryptojacking attack takes place, cryptojackers use others’ processing power and hardware to earn cryptocurrency. They basically tell your computer to spend all its resources solving these complex algorithms on their behalf.

Cryptojackers usually use your computer to mine cryptocurrency from three resources:

Source#1: Cryptomining Malware

Cryptomining malware, like any malware, is a malicious piece of software that can be contained in email, file, attachment, or malicious link. Whenever it is clicked on and downloaded, a cryptomining script will be moved and rooted in your device and will run in the background without the user’s knowledge.

Source#2: JavaScript

Cryptojacking can directly take place on a web browser and web page – that’s known as browser cryptojacking. Hackers establish cryptomining code with a type of programming language and the script will be inserted into many websites or pages. The cryptomining script will automatically run on the website.

Source#3: Cloud

This one’s particularly relevant to businesses or organizations. Cryptojackers can attack cloud services based on files and codes for API keys. Once access is obtained, hackers will largely use CPU resources for cryptomining.

Therefore, cryptojacking can be easily carried out and is difficult to detect. Depending on how damaged the computing system is and how effectively compromised the network, cyber criminals can get more cryptocurrency in illegitimate ways.

How does Cryptojacking Work on my Device?

Now that the above three sources of cryptojacking are covered, it’s time to know how cryptojacking works from head to toe on your device – be it your iPhone, PC, tablet, or android. Because all are vulnerable.

Step#1: Cryptomining code is injected into email, links or web pages.

Step#2: Unsuspecting users run cryptojacking script through insecure activity (like clicking that dodgy link in a spam email) on their devices.

Step#3: Cryptojacking script runs in the background.

Step#4: Complex algorithms are performed by victims’ devices to mine blocks.

Step#5: Cryptocurrency – the reward for the mining – will fall into cryptojacker’s pocket.

In summary, from beginning to the end, cryptojacking is successfully done due to “cooperation” between you and cryptojackers. Nevertheless, you’re kept unaware of the whole process. So it’s hardly what we’d call a fair cooperation. Cryptojackers, however, make profit based on your computing power and device.

Am I Being Cryptojacked? 3 Signs that Cryptojacking is Happening

The essential principle of cryptojacking is that hackers take advantage of businesses’ and users’ computers or other devices to carry out cryptomining to make a quick buck. Because the cryptojacking attack takes place in your device, there are some key signals telling you that you’ve been cryptojacked, although it’s not always so obvious. Here’s a list of the things to look out for.

Signal#1: Suddenly High Power Consumption

The first signal indicating that a device has been suffering from cryptojacking is high power consumption. Cryptomining takes a huge amount of electricity. To save energy is one of the main reasons cryptohackers opt for cryptojacking via others’ processing power. Cryptojacking even inhibits your device’s sleep mode so extremely high processing power can be kept up for extended periods. Therefore, if you find your electrical bills skyrocket, it’s extremely possible you are suffering from cryptojacking.

Signal#2: Too Much CPU Occupying

Cryptojacking can’t be smoothly run unless large amounts of CPU are occupied. If you find much of your CPU is occupied and you’re not downloading large videos. Then, you can speculate your device is suffering from cryptojacking. Listen out for your fan whirring more than usual – that’s a good sign your computer’s CPU is working overtime and your device is trying to cool down.

Signal#3: Sudden Slow Down of Device’s Performance

As cryptojacking attacks take place on your device and work your CPU to the limit, your device will run quite slowly. The slowing down of your device isn’t just a pain momentarily, it can last a long time and cost you some serious money if you run your business from the device.

What Can be Done to Protect Against Cryptojacking?

Mentioned below are some of the steps you can initiate to reduce the risk of cryptojacking on your computer.

• Install an anti-cryptomining or ad-blocking extension on your web browser;
• Start using endpoint protection software that can detect certain known cryptominers;
• Pay proper attention to maintaining your browser extensions;
• Ensure that all your web filtering tools are up to date;

• Form healthy and secure browsing habit and never click unless high security is guaranteed;

• Try to stay more private on social media;

Use a VPN to hide all your online activities.

You May Also Like:


  1. This is thhe right webpage for everyone who hopes tto fnd out
    about this topic. Yoou realize a whuole lot its almost tough to argue with you (not that I actually will need to…HaHa).
    You certainly put a fresh spin on a subjec that’s been discussed for
    decades. Great stuff, juwt wonderful!
    Genne Science Pharmaceuticals

  2. Whats up very nice site!! Guy .. Excellent .. Amazing ..
    I’ll bookmarfk your site and take the feeds also? I am satisfied
    to search out so many useful info right here in the put
    up, we need develop extra strategies in this regard, thank
    you for sharing. . . . . .

  3. Oh my goodness! Awesome article dude! Thank you, However I am
    experiencing difficulties with your RSS. I
    don’t understand why I can’t join it. Is there anybody having identical RSS problems?
    Anyone who knows the answer can you kindly respond?

  4. This design is spectacular! You definitely know how
    to keep a reader amused. Between your wit and your videos, I
    was almost moved to start my own blog (well, almost…HaHa!) Fantastic job.
    I really enjoyed what you had to say, and more than that,
    how you presented it. Too cool!

  5. Hi there, just became aware of your blog through
    Google, and found that it’s really informative. I am gonna watch out
    for brussels. I will be grateful if you continue this
    in future. A lot of people will be benefited
    from your writing. Cheers!

  6. I’m not sure why but this website is loading incredibly slow for me.
    Is anyone else having this issue or is it a
    issue on my end? I’ll check back later and see if the problem still

  7. Hey there! Quick question that’s entirely off topic. Do you
    know how to make your site mobile friendly? My blog looks
    weird when viewing from my iphone. I’m trying to find a template or plugin that
    might be able to resolve this issue. If you have any recommendations,
    please share. Appreciate it!

  8. Greate article. Keep writing such kind of info
    on your site. Im really impressed by your site.
    Hi there, You’ve done a fantastic job. I will definitely digg
    it and in my view suggest to my friends. I am sure they’ll be benefited from this website.

  9. Hi! I could have sworn I’ve visited this website before but after browsing through some of the
    posts I realized it’s new to me. Anyways, I’m certainly delighted I discovered it and I’ll be book-marking
    it and checking back regularly!

  10. Just desire to say your article is as surprising.
    The clarity in your submit is just great and i can assume you’re knowledgeable on this
    subject. Fine together with your permission let me to seize your feed to keep updated with approaching
    post. Thank you one million and please carry on the gratifying work.

  11. Do you mind if I quote a couple of your posts as long as I provide credit
    and sources back to your weblog? My blog site is in the very same niche
    as yours and my users would truly benefit from a lot of the information you present here.

    Please let me know if this alright with you. Thanks!

    • VPN Marketing Team

      Hi, thanks for your attention on our blog content. Yes, you can use some content from this article, but you need to add our link. Thank you.

  12. Normally I ɗo not learn article oon Ƅloցs, but I
    wouⅼԀ like too say thаt this wгite-up very pressureԁ me to take a look at andd do it!
    Your wrditing style has beеn amazed me. Thank
    you, very great article.

    • VPN Marketing Team

      Thanks for your likes on our website. I have to say sorry to you we haven’t a subsription service up to now. But you can bookmark our website if you like the articles here. We’ll provide more useful articles to you. Visit http://bitvpn.net/ to know more about us.

  13. Hi there, I found your website by way of Google at the same time as looking
    for a related matter, your web site got here up, it seems good.

    I’ve bookmarked it in my google bookmarks.
    Hello there, simply was alert to your weblog through Google, and
    found that it’s really informative. I am gonna watch out for
    brussels. I’ll appreciate in case you continue this in future.
    Many people will likely be benefited out of your
    writing. Cheers!

  14. I am extremely impressed together with your writing skills and also
    with the layout on your weblog. Is this a paid subject matter or did you
    modify it your self? Anyway stay up the nice high quality writing,
    it is rare to peer a great blog like this one these days..

  15. Undeniably believe that which you said. Your favourite justification appeared to be at the net the simplest thing to consider of.
    I say to you, I definitely get annoyed even as people think about concerns that they just don’t understand about.
    You controlled to hit the nail upon the highest and also defined out the whole thing without having side effect
    , other people could take a signal. Will probably be again to get more.

  16. I absolutely love your blog and find most of your post’s to be exactly what I’m looking for.
    can you offer guest writers to write content to suit your needs?
    I wouldn’t mind publishing a post or elaborating on many of
    the subjects you write about here. Again, awesome weblog!

  17. I am extremely impressed with your writing skills as
    well as with the layout on your blog. Is this a paid
    theme or did you customize it yourself? Either way keep up the nice quality writing, it’s rare to
    see a great blog like this one these days.

    • VPN Marketing Team

      Hi, thanks for your attention and reading. All the articles published in our blog are originally created by us. We’re so proud of that.

  18. Hmm it seems like your site ate my first comment (it was super long) so
    I guess I’ll just sum it up what I submitted and say, I’m
    thoroughly enjoying your blog. I too am an aspiring blog blogger but I’m
    still new to the whole thing. Do you have any helpful hints for rookie blog writers?
    I’d really appreciate it.

Leave a Reply

Your email address will not be published. Required fields are marked *