On Sunday, December 3rd, we saw a peak in one of our detections, JS:Miner-I, which blocks a cryptocurrency miner that uses the cryptonight algorithm to mine Monero, a popular cryptocurrency. The algorithm is suitable for using PC CPU for mining, and the miner is run using JavaScript. We blocked JS:Miner-I from launching on our users’ PCs, preventing 34.7 million attacks in just one day. The extreme peak wasn’t the only thing that caught our attention; all the detections were launched within Google’s Chrome browser.
