A new cryptominer, dubbed Bird Miner, has been spotted in the wild targeting Mac devices and running via Linux emulation under the guise of a production software tool.
Malwarebytes researchers described Bird Miner as “somewhat stealthy” due to its instructions to bail out at multiple points if Activity Monitor is running and because of its ability to obfuscate the miner code by hiding it inside Qemu images, according to a June 23 blog post.
It's also worth noting that the malware runs via emulation, when it could easily run as native code and could have had better performance and a smaller footprint as a result.
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