Further info on new trojans needed

Internet Security 2010 has these in quarantine.

 

uutecwv.class

hirwfee.class

hiydcxed.class

hieeyfac.class

 

Does anyone know more about what these things are designed to do.  We run a web site and are having a close look at security  locally.  We do SFTP transfers export as well as import to shared hosting.  Any information would be appreciated so we can do whatever we can to close any vulnerabilitys.