reports that 29,139 Mac devices across the world, including the U.S., Canada and Germany, have been infected with a new macOS malware known as Silver Sparrow.
According to Red Canary researchers, the new malware has been distributed as files named 'update.pkg' [VirusTotal] or 'updater.pkg' [VirusTotal], with the update.pkg including both an Apple M1 and an Intel x86_64 binary, while the updater.pkg only has the executable Intel file.
They could not find what the real purpose of the malware is and "[we] have no way of knowing with certainty what payload would be distributed by the malware, if a payload has already been delivered and removed, or if the adversary has a future timeline for distribution," the Red Canary report stated.
Malwarebytes' Thomas Reed said they have no idea how Silver Sparrow is installed. "We don’t know how users would have initially found that installer. In fact, I’m a bit skeptical that it may even still be in distribution, in this form, at least," he added.