ExtraAntivirus is a new rogue. It is from the same family as AV Antispyware, PAntispyware09, MS Antispyware 2009, Pro Antispyware 2009, SysAntivirus 2009, WinSpywareProtect.
It has the same name as another rogue but not from the same family. With so many rogues, it's not a surprise that two families have one day the same product name.
Thanks to Bharath