2、But the latest variant - the "new and improved" Koobface - is even more devious than before.
1、The bad guys certainly know better and Koobface is a perfect example of this.
3、The recent Koobface virus infected thousands of Facebook users, for example, as it was passed along from friend to friend.
5、One of the main reasons Koobface was able to so easily spread on Twitter was due to its use of the URL shortener, now the default on Twitter.
4、不過它的最新變種——“改進”了的新Koobface——比以前更具欺騙*。