raman
2
Take a look at some of these descriptions:
http://www.virusbtn.com/resources/vgrep/vgrep.cgi?terms=win32%3Asteph&product=0
You could also try an onlinescanner for a second opinion:
Try RAV or Trendmicro: http://www.bul-online.de/av/onlinescan.shtml