Steganography, or the practice of concealing a file, message, image or video within another file, message, image or video, may be an older technique, but it continues to be an incredibly versatile and effective method for obscuring or hiding information in plain sight. In 2017, IBM X-Force has identified three different malware samples in network attacks containing cryptocurrency CPU-mining tools hidden within fake image files.
Terrorist uses Steganography:
When a suspected al-Qaeda member was arrested in Berlin in May of 2011, he was found with a memory card with a password-protected folder—and the files within it were hidden. But, as the German newspaper Die Zeit reports, computer forensics experts from the German Federal Criminal Police (BKA) claim to have eventually uncovered its contents—what appeared to be a pornographic video called “KickAss.”