What is #cryptojacking? How to #prevent, #detect, and #recover from it

Source: National Cyber Security News

Cryptojacking is the unauthorized use of someone else’s computer to mine cryptocurrency. Hackers do this by either getting the victim to click on a malicious link in an email that loads cryptomining code on the computer, or by infecting a website or online ad with JavaScript code that auto-executes once loaded in the victim’s browser.

Either way, the cryptojacking code then works in the background as unsuspecting victims use their computers normally. The only sign they might notice is slower performance or lags in execution.

Why cryptojacking is on the rise

No one knows for certain how much cryptocurrency is mined through cryptojacking, but there’s no question that the practice is rampant. Browser-based cryptojacking is growing fast. In November, Adguard reported a 31 percent growth rate for in-browser cryptojacking. Its research found 33,000 websites running cryptomining scripts. Adguard estimated that those site had a billion combined monthly visitors.

“Cryptomining is in its infancy. There’s a lot of room for growth and evolution,” says Marc Laliberte, threat analyst at network security solutions provider WatchGuard. He notes that Coinhive, the most popular JavaScript miner that is also used for legitimate cryptomining activity, is easy to deploy and generated $300 thousand in its first month.

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