Six targeted attacks and lessons that could be learnt from them.

APT war story No. 2 is kind of funny and reiterates the fact that "Targeted attacks" are not really "APTs".

The more advanced APTs these days build their own search engines, sometimes with their own APIs or borrowing the APIs of other well-known search engines, to search for specific data.

The link below has all details:
http://www.csoonline.com/article/748680/6-lessons-learned-about-the-scariest-security-threats