What is the steganography anti-forensics technique?

Steganography is the practice of concealing data within another non-secret file or message to avoid detection. The primary goal is to hide the very existence of the secret data. In the context of anti-forensics, an attacker embeds malicious code or stolen data within an ordinary-looking carrier file, such as an image, audio, or video file. This carrier file can then be exfiltrated or stored on a system without raising suspicion, as forensic tools may not initially identify the hidden content. The technique relies on the carrier medium appearing completely normal to casual observation and initial digital forensic analysis.

A. This describes hiding data in file system slack space or unallocated clusters, a different anti-forensics technique, not steganography.
B. This is file signature manipulation (or magic number modification), an obfuscation method to disguise a file's true type from analysis tools.
C. This describes network tunneling or encapsulation, where data is hidden within the payload of another network protocol (e.g., DNS, ICMP).

1. Official Vendor Documentation (NIST): National Institute of Standards and Technology (NIST)

Special Publication 800-86

Guide to Integrating Forensic Techniques into Incident Response. Section 3.3.3

"Data Hiding

" states: "Steganography is a technique for hiding data within another file... The original file is known as the carrier file

and the combination of the carrier file and the hidden file is the steganography file." This directly supports the concept of concealing files in ordinary places.

2. Official Vendor Documentation (Cisco): Cisco Press

CCNP and CCIE Security Core SCOR 350-701 Official Cert Guide. Chapter 21

"Forensics

" under the "Anti-Forensic Techniques" section

defines steganography as "the science of hiding information

which allows for the existence of the information to be concealed." This aligns with the chosen answer.

3. Academic Publication: Provos

N.

& Honeyman

P. (2003). Hide and Seek: An Introduction to Steganography. IEEE Security & Privacy

1(3)

32-44. The paper defines steganography as "the art and science of communicating in a way which hides the existence of the communication." This core principle is accurately reflected in option D. DOI: https://doi.org/10.1109/MSECP.2003.1203220