A new report from ESET shows that the worm is still quite active, accounting for nearly 4 percent of all malware infections detected in 2011. Conficker claimed second place in the list of most prevalent threats of 2011. The only one that finished ahead of it is even older and mustier: AutoRun infections. The infection vector became such a problem that Microsoft in February of last year pushed out an update that disabled AutoRun functionality in some machines. The patch for the main vulnerability that Conficker uses to infect PCs has been available since late 2008.
Source: https://threatpost.com/infections-will-not-die-conficker-and-autorun-011712/76105/