A new version of the Sundown exploit kit uses a technique called steganography to hide its exploits in harmless-looking image files, Trend Micro reported on Thursday.
Steganography, the practice of hiding information within a file, has been increasingly used by malicious actors, including in the malvertising campaigns conducted recently by the AdGholas and GooNky groups. According to Trend Micro, GooNky has attempted to hide its malvertising traffic by appending malicious code to the end of image files.
