As a category, forensics as almost become infamous for this type of challenge: the frankly, uninspired kind.

Common Tools:

Images:

• Steghide

• Zsteg

• Digital Invisible Ink Toolkit (diit)

• Stegsolve

• Exiftool

Text:

• Stegsnow

Audio:

• Deepsound

• WavSteg

Other:

• Binwalk

• Foremost