Hackers Slipped Mysterious Malware Into Thousands of Macs But Researchers Can't Figure Out Why - Gizmodo

“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.” It’s also not totally clear to researchers how devices were infected.

Even more unsettling, “Sparrow” seems designed to erase itself from a computer once it has delivered its payload.

The program “includes a file check that causes the removal of all persistence mechanisms and scripts” that “removes all of its components from the endpoint,” Lambert said.