# General

### Steganography

Steganography is the practice of hiding a file, message, image, or video within another file, message, image, or video.

```bash
# Detect hidden data
zsteg <file>
steghide info <file>

# Extract hidden files embedded into media files
steghide extract -sf <file> -p <password>

# Crack steghide encoded files
stegseek <file> wordlist.txt
stegcracker <file>
```

### Images

```bash
# Extract EXIF info
exiftool <file>

# Decode QR Code
zbarimg <file>
```

### PDFs

```bash
# Inspect PDF files and find malformed elements
pdf-parser.py -v <file>

# PDF to text
pdftotext <file>
```

### Video

```bash
# Steganography in WAV audio files
python3 wav-steg.py -r -s <file.wav> -o a -n 1 -b 1000

# Dump audio file spectrogram
sox <file> -n spectrogram 
```

### Spectrogram

```bash
Visual representation of the frequency spectrum of a signal over time.
Also known as sonographs, voiceprints, or voicegrams.

Note: Audio files can store data in various forms, including voice notes and visual graphs.

# Tools
- Audacity
- Sonic Visualiser
- dcode.fr/spectral-analysis to view the hidden message inside
```

### Memory Analysis

{% embed url="<https://github.com/volatilityfoundation/volatility3>" %}

### Extract Macro

```bash
python3 -m pip3 install oletools
olevba file.xlsx
```