Cryptocurrency mining became a lucrative business not only to home users but also cybercriminals
Crypto miners are no less dangerous ransomware, as new persistence techniques with new functionalities are used by criminals
Ever since Bitcoin came out back in 2009, a new, digital payment system captivated the world. Due to its innovative nature, the cryptocurrency is decentralized, which means that there is no central authority controlling it. Nevertheless, even the biggest companies and high profile organizations are now using this payment system.
To create crypto, complicated mathematical problems need to be solved by the computing power, and powerful hardware is required. Because anybody can mine digital money, many regular users started to mine coins on their home computers or even create mini stations for the process. Currently, there are thousands of different currencies created, Bitcoin being among the most prominent ones.
Unfortunately, the crypto mining process takes a lot of electrical power to work. For that reason, it might take years before the cost is covered, and only then the profits can emerge.
However, not all mining is carried out with the consent of the device owner. Some hackers came up with a plan to use a lot of computers without the need to invest the money themselves. These networks are called miner botnets.
All the illegally (and without the victims' knowledge) distributed crypto mining malware create one giant network that mines cryptocurrency at its full potential. This way, bad actors can skip the cost of mining, and also increase the efficiency of crypto mining by a significant amount.
Currently, crypto mining malware is among one of the most profitable, along with ransomware. Some ransomware authors even switched to cryptominers due to more profits created.
In late 2017 and during 2018, Bitcoin's value spiked to almost $20,000 and kept fluctuating ever since. These changes affected the rate of malware is created, as well as prices for Nvidia and AMD video cards.
Ways hackers spread the infection
Usually, a miner can infect your computer with the help of a dropper – software, the purpose of which is installing malware on users’ devices.
You can get infected with a dropper when you download pirated versions of games or applications. Sometimes droppers can also be installed with key generators or cracks for software. These type of malicious executables are usually encountered on Peer-2-Peer networks and other file-sharing websites.
When you open the downloaded file, the malicious dropper is activated, which then consequently downloads a miner onto your device. Additionally, it makes sure your system does not notice the miner by also downloading malware that makes the miner very difficult to notice. Besides, crooks often use legal crypto mining software but use it for unlawful purposes.
Another type of illegal cryptocurrency mining comes from browser-based scripts. Quite often, criminals hack legitimate websites and inject cryprominers into them, making any user who visits the site to mine for crooks. Alternatively, bad actors can create their own websites and use such resources as adware to redirect victims to those.
The means to avoid miners
Crypto miners usually do not emit any signs or symptoms per se, but the ones that can be noticed are excessive fan usage, high CPU usage, and computer overheating issues. Due to this, the performance of the device can suffer as well, resulting in poor user experience.
Unfortunately, these type of symptoms might be easily confused with breaking or outdated hardware issues. Therefore, it is crucial to monitor the device's performance and make sure it is not overheating. While CPU usage can be easily checked via the Task Manager, checking GPU usage might be a bit complicated, as third-party software is required for that. Nevertheless, there are plenty of free tools online available.
However, security experts advise to download and install security software that can track, detect, and eliminate malicious software. More ever, the real-time protection utility which specializes in web browsing protection will block the websites that have malicious code implemented in them.
To choose the best anti-malware program, you can visit Reviewedbypro.com, a website dedicated to fighting cybercrime. There you will find tons of security tool reviews and will be able to choose the application that suits your needs the most.
Obviously, the best solution would be not to get infected with crypto-malware in general. We suggest you follow these tips:
- Install security software with real-time protection feature;
- Do not open suspicious attachments or click on links inside emails coming from unknown sources;
- Update your system and software as soon as security patches are released;
- Avoid using high-risk websites, such as gambling, online dating, porn, torrent, and similar;
- Do not click questionable links and pop-ups;
- Scan executables with the security tool before opening them;
- Use strong passwords for all your accounts.