New Virus or a hoax?

Symantec Security Response uncovers hoaxes on a regular basis. These hoaxes usually arrive in the form of an email. Please disregard the hoax emails - they contain bogus warnings usually intent only on frightening or misleading users. The best course of action is to merely delete these hoax emails. Please refer to this page whenever you receive what appears to be a bogus message regarding a new virus, or promotion that sounds too good to be true.

Just to add the Symantec link that - I guess- the above poster has forgotten; below is their link that shows almost all known virus-hoaxes.

http://securityresponse.symantec.com/avcenter/hoax.html

Cheers.

NITEFALL.5815 is a virus. It infects .com and .exe files. 5815 is the version of the virus and not a file extension. You should find out which files are infected, delete them and restore them if they are needed.
Apparently, the only payload is thatit displays a silly message but you shouldn't take any risks and clean you computer asap.

It's Nightfall.5815. Could be a false alarm, though.

(remove spaces from pasted urls)
http://securityresponse.symantec.com/avcenter/venc/dyn/7956.html

http://www.computerhope.com/vn.htm

http://groups.google.com/groups?q=nightfall.5815&hl=en&lr=&ie=UTF-8&oe=utf-8&selm=980302233124.5135917241%40service.symantec.com&rnum=1