hi guys the following info for W32.Naco.B is from Symantec

Wild: Low
Damage: Medium
Distribution: High

Info also at Panda listed as a low threat
Currently McAfee only list Naco.a May-19


W32.Naco.B@mm is a mass-mailing worm that attempts to spread itself through email and file-sharing network.

The worm also contains backdoor functionality and attempts to replace HTML files on Microsoft IIS server.

This threat is written in Microsoft Visual Basic(VB) programming language. The VB runtime libraries are required to execute W32.Naco.B@mm.

NOTE: Due to the bugs in the code, W32.Naco.B@mm may not work properly.




Type: Worm
Infection Length: 86,016 bytes
Systems Affected: Windows 95, Windows 98, Windows NT, Windows 2000, Windows XP, Windows Me, Microsoft IIS
Systems Not Affected: Windows 3.x, Macintosh, OS/2, UNIX, Linux
Personal assesment is low chance of seeing it, and only in some regions.. I expect to see more of my friends Klez and Yaha before I see this one.. But don't take this as a reason to be slack whith your virii protection..

Cheers