Cryptojacking is the act of exploiting a computer to mine cryptocurrencies, often through websites,[1][2][3] against the user's will or while the user is unaware.[4] One notable piece of software used for cryptojacking was Coinhive, which was used in over two-thirds of cryptojacks before its March 2019 shutdown.[5] The cryptocurrencies mined the most often are privacy coins—coins with hidden transaction histories—such as Monero and Zcash.[2][6]
Like most malicious attacks on the computing public, the motive is profit, but unlike other threats, it is designed to remain completely hidden from the user. Cryptojacking malware can lead to slowdowns and crashes due to straining of computational resources.[7]
Bitcoin mining by personal computers infected with malware is being challenged by dedicated hardware, such as FPGA and ASIC platforms, which are more efficient in terms of power consumption and thus may have lower costs than theft of computing resources.[8]