This article is an analysis of a Downloader first discovered ITW in 2006. It is widely detected by Anti-Virus vendors, also several reports are available:
http://www.threatexpert.com/report.aspx?md5=a595b08e16a0605e34c9bc310af89c2c
http://www.mcafee.com/threat-intelligence/malware/default.aspx?id=285381
https://secure2.sophos.com/en-us/threat-center/threat-analyses/viruses-and-spyware/Troj~Bckdr-QIB/detailed-analysis.aspx
It...