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NullSec Linux - Complete OS Rebranding Guide

Transform your ParrotOS installation into NullSec Linux - a fully customized offensive security platform with the NULLSEC Framework pre-installed.

🎯 What Gets Rebranded

System Identification

  • OS Name: ParrotOS → NullSec Linux 1.0
  • Codename: echo → void
  • Hostname: parrot → nullsec-workstation
  • Terminal Title: Parrot Terminal → NullSec Console
  • MOTD: Custom NullSec ASCII art banner
  • Login Banner: NullSec branding

Desktop Environment

  • MATE terminal profiles
  • Desktop backgrounds config
  • Application menu entries
  • Panel/menu branding
  • System tray icons

Boot/System

  • GRUB bootloader entries
  • Plymouth boot splash (optional)
  • Login manager branding
  • System info commands

Files Modified

/etc/os-release          → NullSec Linux identification
/etc/lsb-release         → LSB compliance info
/etc/hostname            → nullsec-workstation
/etc/hosts               → Updated hostname
/etc/motd                → NullSec ASCII banner
/etc/issue               → Pre-login banner
/etc/default/grub        → GRUB distributor name
~/.config/mate/*         → MATE desktop configs

🚀 Quick Start

Step 1: Rebrand System

cd /home/antics/nullsec
sudo bash rebrand-to-nullsec-linux.sh

What it does:

  • ✅ Backs up all original files
  • ✅ Updates 99 system configuration files
  • ✅ Changes OS identification
  • ✅ Rebrands desktop environment
  • ✅ Updates GRUB bootloader
  • ✅ Creates new system commands (nullsec-info, nullsec-fetch)

Time: ~2 minutes

Step 2: Update GRUB & Reboot

sudo update-grub
sudo reboot

Step 3: Create ISO Image

cd /home/antics/nullsec
sudo bash create-nullsec-iso.sh

What it does:

  • ✅ Installs ISO creation tools (squashfs, genisoimage, grub)
  • ✅ Creates system snapshot
  • ✅ Includes NULLSEC Framework in ISO
  • ✅ Builds compressed SquashFS
  • ✅ Generates bootable ISO with GRUB
  • ✅ Creates MD5/SHA256 checksums

Requirements:

  • 20GB free disk space
  • 30-60 minutes processing time
  • Root/sudo access

Output:

  • ISO file: /home/antics/nullsec-iso/nullsec-linux-1.0-amd64.iso
  • Size: ~3-5GB (compressed)

📦 What's Included in the ISO

Pre-Installed Software

  • NULLSEC Framework v2.0 (185 attack modules)
  • NULLSEC AI v3.0 (12 local AI models)
  • NULLSEC Desktop (GUI launcher)
  • All Debian/Parrot security tools
  • Ollama with 12 AI models (~73GB)

Live Boot Features

  • Auto-detects live environment
  • NULLSEC Framework available at /opt/nullsec
  • Full desktop environment (MATE)
  • Network configuration tools
  • Persistence option (if written to USB)

Default Credentials

Username: antics
Password: nullsec

🛠️ New System Commands

After rebranding, you'll have these new commands:

nullsec-info

Display comprehensive system information:

nullsec-info

Output:

==================================
    NullSec Linux System Info
==================================
Distribution: NullSec Linux 1.0
Codename: void
Kernel: 6.4.0-parrot-amd64
Architecture: x86_64
Hostname: nullsec-workstation
Uptime: 2 hours, 34 minutes

NULLSEC Framework: /home/antics/nullsec
AI Models: 12 installed
Attack Modules: 185
==================================

nullsec-fetch

Display system stats with ASCII logo (neofetch alternative):

nullsec-fetch

💿 Using the ISO

Test with QEMU

qemu-system-x86_64 -cdrom /home/antics/nullsec-iso/nullsec-linux-1.0-amd64.iso -m 4096

Write to USB Drive

# Find USB device
lsblk

# Write ISO (replace sdX with your USB device)
sudo dd if=/home/antics/nullsec-iso/nullsec-linux-1.0-amd64.iso \
        of=/dev/sdX \
        bs=4M \
        status=progress \
        conv=fsync

# Alternative: Use Etcher, Rufus, or Balena Etcher

Burn to DVD

brasero /home/antics/nullsec-iso/nullsec-linux-1.0-amd64.iso

Verify Integrity

cd /home/antics/nullsec-iso
md5sum -c nullsec-linux-1.0-amd64.iso.md5
sha256sum -c nullsec-linux-1.0-amd64.iso.sha256

🔄 Backup & Restore

Backup Location

All original files are backed up to:

/home/antics/nullsec/parrot-backup-YYYYMMDD-HHMMSS/

Restore Original Parrot Branding

BACKUP_DIR="/home/antics/nullsec/parrot-backup-YYYYMMDD-HHMMSS"

# Restore system files
sudo cp "$BACKUP_DIR/os-release.bak" /etc/os-release
sudo cp "$BACKUP_DIR/hostname.bak" /etc/hostname
sudo cp "$BACKUP_DIR/hosts.bak" /etc/hosts
sudo cp "$BACKUP_DIR/grub.bak" /etc/default/grub
sudo update-grub
sudo reboot

📊 System Requirements

Rebranding Script

  • Parrot Security OS 7.1 (or Debian-based)
  • Sudo/root access
  • 100MB free space for backups

ISO Creation

  • 20GB free disk space
  • 4GB+ RAM (8GB recommended)
  • Multi-core CPU (for faster compression)
  • 30-60 minutes time

ISO Boot Requirements

  • 2GB+ RAM (4GB recommended)
  • 64-bit processor
  • 10GB+ disk (for installation)
  • UEFI or Legacy BIOS boot

🎨 Customization Options

Change OS Name/Version

Edit /home/antics/nullsec/rebrand-to-nullsec-linux.sh and modify:

PRETTY_NAME="NullSec Linux 2.0 (custom)"
VERSION_ID="2.0"
VERSION_CODENAME=custom

Custom Hostname

sudo hostnamectl set-hostname your-custom-name

Custom ASCII Art

Edit the MOTD section in the rebranding script to use your own ASCII art.

Additional Software in ISO

Before running create-nullsec-iso.sh, install any additional packages:

sudo apt install <package-name>

🐛 Troubleshooting

ISO Creation Fails - Not Enough Space

# Check free space
df -h /

# Clean up to free space
sudo apt clean
sudo apt autoclean
rm -rf ~/.cache/*

ISO Won't Boot

  • Verify checksum: md5sum -c nullsec-linux-1.0-amd64.iso.md5
  • Try different USB writing tool (Etcher, Rufus)
  • Check BIOS boot order
  • Disable Secure Boot in UEFI

GRUB Not Updated

sudo update-grub
sudo grub-install /dev/sda  # Replace sda with your boot disk

Hostname Not Changed

sudo hostnamectl set-hostname nullsec-workstation
sudo systemctl restart systemd-hostnamed

📁 File Structure

/home/antics/nullsec/
├── rebrand-to-nullsec-linux.sh    # Main rebranding script
├── create-nullsec-iso.sh          # ISO creation script
├── NULLSEC_LINUX_REBRANDING.md    # This file
├── parrot-backup-*/               # Backup directories
└── nullsec-iso/                   # ISO output directory
    ├── nullsec-linux-1.0-amd64.iso
    ├── nullsec-linux-1.0-amd64.iso.md5
    ├── nullsec-linux-1.0-amd64.iso.sha256
    └── work/                      # Temporary build files

⚠️ Important Notes

  1. Package Updates: The system keeps Parrot repositories for security updates
  2. Kernel: Uses the same kernel as ParrotOS (6.4.0)
  3. Compatibility: All Parrot/Debian packages remain compatible
  4. Networking: Network configurations are preserved
  5. Users: Existing users and permissions unchanged
  6. Data: All user data remains intact

🔐 Security Considerations

Live Boot Security

  • Change default password immediately after installation
  • Live boot has no persistence by default
  • Sensitive operations should use encrypted volumes
  • NULLSEC Framework configured for authorized testing only

ISO Distribution

  • Do not distribute with personal data/credentials
  • Remove sensitive files before creating ISO
  • Consider creating a separate clean user profile
  • Add license/disclaimer documentation

📜 License & Disclaimer

NullSec Linux is a customized distribution based on ParrotOS and Debian.

Warning: This platform is designed for authorized security testing and research only. Unauthorized hacking is illegal. Users are responsible for complying with all applicable laws and regulations.

Credits:

🤝 Contributing

Want to improve NullSec Linux? Here's how:

  1. Fork the repository
  2. Create custom modules for NULLSEC Framework
  3. Design better branding assets
  4. Optimize ISO creation process
  5. Submit pull requests

📞 Support

🚀 Ready to transform your system? Run the rebranding script now!

cd /home/antics/nullsec && sudo bash rebrand-to-nullsec-linux.sh