This book will give you a quick and straightforward understanding of the mechanisms that cybercriminals are using to infect systems and steal information from businesses, governments, and individuals. It highlights how steganography and covert channels have been used in cyberattacks involving "modern" malware (APT32, APT37, Ursnif, Powload, LightNeuron/Turla, Platinum APT, Waterbug/Turla, Lokibot, The Dukes (Operation Ghost), Titanium, etc.) to evade detection measures based on antivirus technology or network-level protections. The text includes more than 200 references, where you will find full analyses of the attack campaigns and the APTs examined. In addition, for your convenience, the book delves into the concepts behind the underlying steganographic techniques and should — that, at least, is my intention — leave you better equipped to face these new challenges, especially if you work in information security, reverse engineering, computer forensics/DFIR, or as a malware analyst. And of course, if you work in offensive security, you will learn better techniques for staying hidden.