Virus hunters combing through the wreckage of the zero-day WMF (Windows Metafile) attacks have found evidence that exploit code was being peddled by Russian hacker groups for $4,000 a pop.
The first sign of an exploit was traced back to the middle of December 2005, a full two weeks before anti-virus vendors started noticing mysterious WMF files rigged with malicious executable code, says Alexander Gostev, a senior virus analyst at Kaspersky Lab.
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