The latest issue of “Technical Mujahid”, a = training manual for = terrorist organizations, contains a detailed description of = steganography and steganalysis.
http://www.jamestown.org/terrorism/news/article.php?articleid=2370293
The English translation of the manual is available:
http://www.pvtr.org/pdf/Terrorism%20Informatics/Report_Steganography_final.pdf