Here we go again: Intego is urging Mac users to exercise caution when installing updates to Adobe Flash Player as a fake update has been discovered that infects computers.
Intel's security guru’s have identified the rogue package installer as a variant of OSX/InstallCore, and have updated Intego VirusBarrier definitions to provide protection. The in-the-wild attack has been spread in the form of a Mac Package installer .pkg file, also known a flat package.
It’s been signed with a legitimate Developer ID certificate, tricking OS X's built-in Gatekeeper security feature to believe that the files can be trusted and aren’t malicious. Gatekeeper is a OS X feature that builds on the operating system’s existing malware checks to help protect your Mac from malware and misbehaving apps downloaded from the Internet.