what are those updated from nod32?

Nod32 has started to update some wired updates that calles: HLLC/Bizarr.17000, HLLC/Dosinfo.52480, HLLO/13112.A, HLLO/4317.B, HLLO/9504, HLLO/Aids.13952, HLLO/Death.8816,
and they have started with this for some days ago, what are those wired names ?
and why dont they updated as usual like example win32.backdoor. or Trojan/Downloader and so an?

 

With Google's help:


HLL Viruses
These viruses are written in a High Level Language such as Pascal, BASIC or C. Since they consist mostly of "canned code", it is much harder to select a "signature" that won't cause false alarms.
HLLC or HLL.cmp
HLLC or HLL.cmp both mean a High Level Language Companion virus. A companion virus is a virus that takes advantage of a quirk in DOS.
If there is a file called PROGRAM.COM and a file called PROGRAM.EXE in the same directory and you type PROGRAM at the DOS prompt, then PROGRAM.COM will be the file that DOS runs.

Once the virus in PROGRAM.COM runs, then the virus runs PROGRAM.EXE so you don't notice anything.

The file being infected, PROGRAM.EXE, doesn't change, but PROGRAM.COM did not exist until the virus created it. The solution is to simply delete the COM file.

If there really is a companion virus, then the antivirus program will find it in a COM file and there will be an EXE file by the same name in the same directory. Otherwise, it's a false alarm.

HLLO or HLL.ow
HLLO or HLL.ow both mean a High Level Language Overwriting virus. A overwriting virus replaces the host file with itself and doesn't store the original file anywhere. These viruses are very obvious and unlikely to be a threat. If the file the antivirus program says is infected still works, then it is a false alarm. Some antiviruses call Dmsetup worms HLLO.DM_Setup even though they aren't really HLLO viruses.
HLLP
These are High Level Language Parasitic viruses. They modify but don't destroy the original file. HLLP viruses known to be "in the wild" are the HLLP.Krile family, the HLLP.Weed family, and the Win32.HLLP.Detroie(a.k.a Cheval De Troie or Sockets de Troie) family.

 

To get the information complette - number after the dot is virus size in bytes.