What do you think when a Casino software, some toolbars and a girl dancing on your desktop do appear on your computer, without you wanting them to do so? We think that's a typical case of what has different names, from trojan downloader or trojan dropper to hijacker.
Well, those probably not fully naked dancing desktop girls from that malware package are something named DeskMates from a company called Oska Educational Systems Pty Limited. Whether this kind of anatomy is really educational is another question not to be dealt with today, more important is that Oska didn't like their "mates" to be detected as a part of a trojan installation - understandable if they should have nothing to do with the trojan. But then, instead of working...