“Mac users are once again being urged to exercise caution when installing updates to Adobe Flash Player, after a fake update was discovered infecting computers,” Graham Cluley reports for Intego. “Intego security experts have identified the rogue package installer as a variant of OSX/InstallCore, and have updated Intego VirusBarrier definitions to provide protection.”
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“The in-the-wild attack has been spread in the form of a Mac Package installer .pkg file, also known a flat package, and has been signed with a legitimate Developer ID certificate — effectively tricking OS X’s built-in Gatekeeper security to believe that the files can be trusted and are not malicious,” Cluley reports. “As a result, victims may find that their OS X computers have had a number of potentially unwanted programs (PUPs) installed on their systems. Intego researchers report that third-party apps they have seen being installed by the fake Adobe Flash update include MegaBackup, ZipCloud, and MacKeeper.”
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