The recent increase of Bagle variants are being spammed out in large quantities through a distributed network of compromised machines, called botnets. Some of the variants are older versions of the Bagle virus, repacked to avoid detection. The new Bagles are Trojan downloaders, which retrieve and install malicious files from a pre-programmed Web site location and create a backdoor on a machine. This distribution mechanism causes variants to spread outside of the spam channels and leaves unprotected users or systems with outdated virus signatures vulnerable to attack.

   ESET is providing a free remover for the most prevalent variants of the Bagle worms, which can be downloaded at www.eset.com.
   
   ESET's Virus Radar (www.virusradar.com), a real-time malware tracking tool, identified the new Bagle variants using NOD32. Virus Radar provides site visitors with easy access to in-depth analysis of the latest malicious outbreaks and processes approximately four million email messages per day to provide information such as the exact date a virus was first detected and its current detection rate. Virus Radar is also capable of tracking the progression of a single virus over a given period -- in some instances from the earliest heuristic detection of a new virus to the point where the virus disappears.