A network of Russian malware writers and spammers paid hackers 43 cents for each Mac machine they infected with bogus video software, a sign that Macs have become attack targets, a security researcher said yesterday.

In a presentation Thursday at the Virus Bulletin 2009 security conference in Geneva, Switzerland, Sophos researcher Dmitry Samosseiko discussed his investigation of the Russian "Partnerka," a tangled collection of Web affiliates who rake in hundreds of thousands of dollars from spam and malware, most of the former related to phony drug sites, and much of the latter targeting Windows users with fake security software, or "scareware."