Downadup/Conficker worm

First version of this worm is known from december 2008. Nowadays it has 300+ several variants. More information could be found in Virus Lab Blog.
January 22, 2009

I-Worm/Nuwar

Propagation method of new Nuwar variant is still similar to its precedessors. Spammed mails with link in IP format directs users to the worm web pages where the users are prompted to download one of the worm files with the name funny.exe. Names of other downloadable files are kickme.exe and foolsday.exe. AVG detects this threat as I-Worm/Nuwar.R.
March 31, 2008

Win32/Mabezat.A

In last few days we`ve registered a larger amount of PE files infected by this virus. Win32/Mabezat is polymorphic file infector which infects PE files. More information could be found in our Virus Encyclopedia.
November 14, 2007

Trojan Downloader.Agent.UZM

A new Trojan Downloader was spammed today. Trojan is attached in zip archive to emails in HTML format with subject "Hot game" and body text that claims some Angelina Jolie or Lara Croft undressing game. xgame.zip attachment contains xgame.exe (20992B) which drops executes and deletes kernel driver C:\WINDOWS\System32\drivers\runtime.sys and downloads another downloader smartdrv.exe. runtime.sys runs injects and hides Iexplore.exe process and downloads another components. xgame.exe is detected as Trojan Downloader.Agent.UZM, smartdrv.exe is detected as Trojan Downloader.Agent.UZN, runtime.sys is detected as Trojan Downloader.Agent.THW and other downloaded components are detected as several variants of Trojan Backdoor.Ntrootkit.
November 10, 2007

I-Worm/Stration downloader

Next Stration downloader variant spreads by email in messages with randomly generated subject and body with two attachments. PDF attachment is harmless but EXE attachment which is 18708B long is downloader itself and AVG detects it as I-Worm/Stration. More information about Stration worm familly can be found in the Virus Encyclopedia.
November 5, 2007