Stealth cryptocurrency mining in one’s browser, without the user’s permission, is one of our least-favorite trends of the past six months. While there were always questions about whether cryptocurrency mining in-browser could serve as an alternate revenue stream for websites, there was at least an idea that some kind of alternate funding system might emerge — hopefully putting an end to the eternal cycle of invasive ads driving users to deploy ad blockers, which then drives websites to adopt more invasive ads.
But instead of an informed approach in which end users consented to such mining, we’ve seen stealth operations popping up everywhere that steal CPU cycles from users, particularly if more than one crypto mining malware is running simultaneously. While most of these plugins are written to only put a light load on user’s CPUs, that’s only if the miner is running in a single browser instance, and only if it’s running on a single site. Our tests back in 2017 showed that using different browsers can defeat this dubious attempt to sandbox the performance impact. And, of course, even running one site will still drain battery life more quickly than having the CPU properly idled.
It’s like someone figured out how to monetize the awful Flash ads everyone used to hate for eating CPU cycles. A true win-win! And now it’s even hitting YouTube.
TrendMicro has released an updated report, showing a sharp rise in ads served by Google’s DoubleClick service being infested with mining software.
Earlier miners, just a few months ago, were sticking to much lower figures as part of a big to stay hidden. We were concerned at the time that this could escalate, and it looks as if it is. As more illicit services slug it out to steal this kind of processing time, your CPU’s processing time is going to be a casualty.
If you feel like your system is running louder for no reason, don’t be afraid to pop open Task Manager and look for proof. CPU utilization will be much higher if you’ve got a cryptocurrency miner stealing cycles.
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