The supposedly new version of Mydoom that is being discussed today is not new at all. We have been detecting it since July 26, 2004. The so-called new version is the same worm only only only packed with a different packer this time it was MEW, whereas in the summer it was UPX.m.Mydoom.bb. We detect the email worm some av vendors are calling version Mydoe.bb as Email-worm.Win32.mpmp.”]
Source: https://securelist.com/a-rose-by-any-other-name-mydoom-bb/29966/