Researchers have discovered at least two new pieces of malware in the wild that subject Mac users to advanced surveillance campaigns designed to surreptitiously siphon confidential data from their machines.

According to blog posts from Kaspersky and Sophos, malware identified as SabPub arrives in a booby-trapped Microsoft Word document that exploits a critical vulnerability that was patched three years ago. The APT, or advanced persistent threat, appears to have similarities to an espionage campaign that Ars reported last month, which targets employees of several pro-Tibetan non-governmental organizations. Kaspersky Lab Expert Costin Raiu said two new strains of SabPub are noteworthy because of their ability to stay hidden until now.

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