Steganography #
At a Glance #
Steganography is the art and science of hiding a message, image, or file within another message, image, or file 1
Note: Steganography is used to hide the occurrence of communication.
General #
Determine the file type.
file filename.ext
Read file meta-data.
exiftool filename.ext
Extract printable characters.
strings -n 6 -e s filename.ext
Parameters
-n <length>: Print sequence of at least<length>chars long.-e <encoding>: Character encoding of the strings that are to be found.s: single-7-bit-byte characters (ASCII, ISO 8859, etc., default).S: single-8-bit-byte characters.b: 16-bit bigendian.l: 16-bit littleendian.B: 32-bit bigendian.L: 32-bit littleendian.
Text #
Look for anomalies in font and spacing.
Unicode Text Steganography Encoders / Decoders
Images #
steghide 2 #
Steghide supports JPEG, BMP, WAV and AU file formats.
Display information about a cover or stego file.
steghide info filename.ext
Extract secret data.
steghide extract -sf filename.ext
Parameters
info: Display information about a cover or stego file.extract: Extract secret data from a stego file.-sf <file>: Specify the name for the stego file.
StegoVeritas #
StegoVeritas is a powerful multi-tool. Supports GIF, JPEG, PNG, TIFF, BMP file formats and will attempt to run on any file.
stegoveritas filename.ext
LSBSteg 3 #
LSBSteg uses LSB steganography to hide and recover files from the color information of an RGB image, BMP or PNG.
stegolsb steglsb -r -i filename.ext -o output.zip -n 2
Parameters
-r: To recover data from a sound file.-i <file>: Path to.wavfile.-o <file>: Path to an output file.-n <int>: LSBs to use (default: 2).
Online Tools #
- Steganographic Decoder - Steghide
- Forensically - Digital image forensics multi-tool.
- Magic Eye Solver
Audio #
See steghide
WavSteg 3 #
WavSteg uses LSB steganography to hide and recover files from the samples of a WAV file.
stegolsb wavsteg -r -i filename.ext -o output.txt -n 2 -b 5589889
Parameters
-r: To recover data from a sound file.-i <file>: Path to.wavfile.-o <file>: Path to an output file.-n <int>: LSBs to use (default: 2).-b <int>: How many bytes to recover from the sound file.
Sonic Visualiser #
Sonic Visualizer is an application for viewing and analysing the content of music audio files.
DTMF #
Further Reading #
“Steganography - Wikipedia.” Wikipedia, the Free Encyclopedia, Wikimedia Foundation, Inc., 31 Oct. 2001, https://en.wikipedia.org/wiki/Steganography. ↩︎
Hetzl, Stefan. “Manual.” Steghide, http://steghide.sourceforge.net/documentation/manpage.php. ↩︎
ragibson. “Ragibson/Steganography: Least Significant Bit Steganography.” GitHub, https://github.com/ragibson/Steganography. ↩︎