Surreptitious mining of cryptocurrency by hackers is spreading very, very fast.The news:
Over 4,000 websites, including those of the US Federal Judiciary and the UK National Health Service, have been secretly mining digital coins for crooks
.How it worked:
Hackers injected malware into a widely used plugin, Browsealoud. Website visitors then involuntarily gave up their computing power to the hackers.Why it matters:
Cryptojacking is becoming one of the world’s biggest cyberthreats
. This news shows how easy it is for crooks to spread the trick with a single hack.