Coin Mining Malware
Coin mining malware, also known as cryptojacking, is a type of malicious software that uses a computer's processing power to mine cryptocurrencies without the user's knowledge or consent. Unlike traditional malware designed to steal data or encrypt files, coin mining malware operates silently in the background, consuming CPU and GPU resources to generate digital coins for the attacker.
Infection often occurs through compromised websites that run mining scripts in the browser, deceptive email attachments, fake software updates, and bundled downloads. Once active, the malware can cause noticeable system slowdown, overheating, increased fan activity, and higher electricity bills.
There are two main categories: browser-based cryptojacking, which executes when a user visits an infected webpage and typically stops when the page is closed, and persistent executable malware, which installs itself on the system and can survive reboots. The latter is more dangerous as it may also provide backdoor access for other threats.
Common signs of a coin mining malware infection include unusually high CPU or GPU usage (often reaching 100%), sluggish performance, loud fans, overheating, and a spike in power consumption. Users may also notice that their device remains slow even after closing all applications.
To protect against coin mining malware, keep your operating system and antivirus software up to date, avoid downloading software from untrusted sources, use browser extensions that block cryptocurrency mining scripts, and regularly monitor task manager or activity monitor for unusual resource consumption. For organizations, implementing endpoint detection and network monitoring can help detect and block cryptojacking attempts.