On July 26, according to data from a report by cybersecurity company SonicWall, the agency recorded a total of 332.3 million cryptojacking attacks in the first half of 2023, an increase of 399% compared to the whole of last year. This number is higher than the total number of cryptojacking attacks in 2020, 2021 and 2022. SonicWall said that cryptojacking involves using servers and computer equipment belonging to others to mine digital assets, among which privacy-centric Monero is the most popular. Those affected may not even realize that they are victims, they may just feel that their machines are running slower than usual. Spencer Starkey, vice president of SonicWall in Europe, the Middle East and Africa, said that the biggest symptoms of cryptojacking include slower device response speeds, abnormally high electricity bills, and overheating of batteries leading to excessive use of fans. Compared with ransomware or banking Trojans, the goal of cryptojackers is to remain undetected for as long as possible.