Jenxcus is a variety of VBScript malware, and once it infects a computer, it can open a back door on the machine through which an attacker can take control of the system remotely. It’s being bundled with other programs downloaded from web sites and torrent files. Microsoft has included it in this month’s Malicious Software Removal Tool (MSRT).
Read more here:
http://blogs.technet.com/b/mmpc/archive/2014/02/11/msrt-february-2014-jenxcus.aspx