Hackers have exploited a weakness in updated versions of macOS that allowed them to take screenshots on infected Macs without obtaining victims’ permission.
The zero-day was exploited by XCSSET, a malware discovered last August by TrendMicro, a security firm.
XCSSET used two zero-days to infect Mac developers with malware that stole browser files and cookies.
The malware also injected backdoors into websites, stole data from Skype and other apps, took screenshots, and encrypted files.
The infections came in the form of a malicious project that the hacker wrote for Xcode.
Xcode is a tool that Apple makes available to developers who write apps for macOS or other Apple operating systems.
Once an XCSSET project was opened and built, the malicious code ran on the user’s Mac, according to TrendMicro.
It is unlikely that XCSSET will infect Macs unless it has carried out a malicious Xcode project.
The majority of users should not worry unless they are developers who have used one of the projects.
For more information, read the original story in arstechnica.