September 18, 2021

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Steganography explained and how to protect against it

Steganography definition

Steganography is a millennia-old concept that means hiding a secret message within an ordinary-looking file that doesn’t raise any suspicions. The word has Greek roots, being a combination of steganos, which translates to “concealed, protected,” and graphein, which means “writing.”

APT groups, ransomware gangs, and other threat actors often hide information when attacking a target. For example, they might conceal data when exfiltrating it, cloak a malicious tool, or send instructions for command-and-control servers. They could put all this information in unassuming image, video, sound, or text files.

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