FireEye security researchers analyzed approximately 2000 incidents classified as APTs that occurred during 2012 and found that most were using Gh0st RAT (RAT stands for Remote Access Tool) to steal information from computers. Read more about this here:
About The Author
Debra Littlejohn Shinder is a technology and security analyst and author specializing in identity, security and cybercrime, utilizing her past experience as a police officer and police academy/criminal justice instructor. She has written numerous books and articles for web and print publications and has been awarded the Microsoft MVP designation for fourteen years in a row.