Carried remotely and executed locally sometimes. Sounds like a riddle, but in reality, it is one more type of fraud. It is called Cryptojacking. So, how some individuals can use your computer as a mining spot, how to prevent it, and much more from ENON .
What is Cryptojacking?
Cryptojacking refers to the use of someone else’s computing power to mine cryptocurrencies covertly. It occurs when malicious actors inject malicious code into a victim’s system, leveraging the processing power of their devices. Such as computers, smartphones, or servers — to mine cryptocurrencies like Bitcoin or Monero.
This malicious software runs silently in the background, often through infected websites, emails, or downloadable files, without the user’s knowledge or consent. The mining process consumes the device’s resources, resulting in slower performance, increased energy consumption, and, in some cases, potential damage to the device. Cybercriminals benefit from the generated cryptocurrencies while exploiting the victim’s computational resources.
Types of Cryptojacking
Cryptojacking can be broadly categorized into two main types: browser-based and file-based.
Browser-Based Cryptojacking
In-Browser Mining: Malicious code injected into websites or ads uses visitors’ browsers to mine cryptocurrency without their consent.
JavaScript Mining Scripts: Exploiting JavaScript vulnerabilities, these scripts run in the background of a user’s browser while visiting compromised websites.
File-Based Cryptojacking:
Malware and Trojan Downloads: Users unwittingly download malware or trojans containing crypto-mining code, infecting the system.
Drive-by Downloads: Malicious software is downloaded automatically when visiting compromised websites or opening malicious attachments in emails.
Browser-based cryptojacking uses visitors’ browsers, while file-based attacks involve malware installations on the victim’s system.
Cryptojacking Examples
Let’s imagine two different people – person A and person B. Person A suffered browser-based cryptojacking, and person B – file-based. Let’s start with the first one.
Browser-based example
Person A visits a website that hackers have compromised. Unbeknownst to them, the site contains hidden mining scripts that hijack their browser’s resources. Consequently, as Person A navigates through the site, their computer starts mining cryptocurrency for the attacker.
File-based example
Person B unwittingly downloads a seemingly innocuous file from an untrusted source. Little do they know, the file contains malware that installs crypto-mining software onto their device. This malicious software operates in the background, utilizing system resources to mine cryptocurrency for the attacker.
Both scenarios showcase how cryptojacking can occur through various methods. Either via web browsers or through the installation of malware-infected files, compromising individuals’ devices for unauthorized cryptocurrency mining.
How Do Cryptojacking Attacks Work?
To better understand this type of fraud, you need to understand how it works. Cryptojacking attacks involve the illicit use of individuals’ or organizations’ computing resources to mine cryptocurrencies without their consent or knowledge. These attacks exploit vulnerabilities in systems, often facilitated through various methods:
Infected Websites : First, cybercriminals create or compromise websites with malicious code that executes as soon as a user visits the site. This code secretly uses the visitor’s device resources for mining.Malicious Links or Emails : Next, Scammers send phishing emails or embed malicious links in websites. Clicking these links can install crypto-mining malware on the victim’s device.Drive-By Downloads : Then, malware can be downloaded onto a device when users click on ads, banners, or download files from unreliable sources. Once installed, the malware operates silently in the background.Software Vulnerabilities : Finally, exploiting security weaknesses in software or operating systems allows hackers to inject crypto-mining scripts into devices connected to the internet.
Once the malicious script is executed on a victim’s device, it utilizes the device’s processing power and resources to solve complex mathematical problems. The mined cryptocurrencies are sent to the attacker’s wallet. While causing a slowdown in the victim’s device performance, increased energy consumption, and potential hardware damage due to excessive usage.
Detecting cryptojacking is challenging; it’s designed to operate discreetly. Security measures like reputable antivirus software help prevent these attacks. Keeping software updated is crucial. Being cautious of suspicious links or emails also helps. Browser extensions or security tools blocking mining scripts offer extra protection.
How to Detect Cryptojacking
Detecting cryptojacking can be complex as these activities often aim to operate stealthily. Here are a few methods to detect potential cryptojacking:
Monitoring System Performance: Sudden drops in device performance, increased CPU usage, or a decline in battery life could indicate unauthorized crypto mining.
Regular System Scans: Perform routine scans using reputable antivirus or anti-malware software that includes specific tools to detect crypto mining scripts or malware.
Network Monitoring: Use network monitoring tools to detect unusual traffic patterns or connections to known mining pools or crypto-related domains.
Browser Extensions: Install browser extensions or add-ons that can block known mining scripts. These tools can prevent unauthorized crypto mining when browsing.
Ad Blockers: Some ad blockers now include features to block crypto mining scripts embedded in ads or websites.
Firewall and Security Measures: Configure firewalls and employ robust security measures to prevent unauthorized access to your system or network.
Remember, staying vigilant and keeping your system and security software up-to-date are key practices in detecting and preventing cryptojacking attempts.
How to Prevent Cryptojacking
As with any other fraud in the crypto world, you can prevent cryptojacking. We collect the most common advice, that can help you stay secure:
Regular Software Updates: First, regularly update operating systems and applications to patch vulnerabilities.
Use Reputable Antivirus Software: Next, deploy robust antivirus software with anti-malware features.
Practice Caution with Links and Emails: Then, avoid clicking on suspicious links or opening attachments in unsolicited emails.
Browser-Based Protections: Employ browser extensions or plugins designed to block mining scripts.
Monitoring System Performance: Monitor CPU and memory usage to detect unusual spikes that may indicate cryptojacking.
Network Security: Implement firewalls and network security protocols to prevent unauthorized access.
Occasionally, these methods may seem very common and can be used to prevent any other fraud.
In the Conclusion
In the event of encountering cryptojacking, swift action is crucial. If you suspect your system is affected, immediately disconnect the device from the internet to halt any ongoing unauthorized mining. Subsequently, conduct a comprehensive scan using reputable antivirus or anti-malware software to detect and eliminate the malicious scripts. Additionally, update all security software to their latest versions and consider changing passwords, especially for sensitive accounts. To prevent future attacks, it’s imperative to install robust security software that specializes in detecting and blocking cryptojacking attempts. Regular system scans, browser extensions that thwart mining scripts, and staying informed about evolving cybersecurity threats are essential practices to safeguard against cryptojacking.
What is an example of cryptojacking? As an example, it’s a hacker infiltrating a website to mine cryptocurrency using visitors’ computing power without their consent.
How much does cryptojacking make? The amount it makes varies widely depending on the computational power and duration of the hijacking. On average, $1 for every $53 their victim is billed.
What are the risks of cryptojacking? The risks of cryptojacking include reduced device performance, increased electricity costs, potential data loss, and compromised security.
