Bjorn
Bjorn is a Python-based network scanning and offensive security tool designed to run on Raspberry Pi with an e-Paper display. It autonomously discovers hosts, identifies open ports, assesses vulnerabilities, and executes brute-force attacks and data exfiltration.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | infinition/Bjorn |
| Owner | infinition |
| Primary language | Python |
| License | MIT — OSI-approved |
| Stars | 6.1k |
| Forks | 358 |
| Open issues | 59 |
| Latest release | v1.0.0 (2025-12-02) |
| Last updated | 2026-05-05 |
| Source | https://github.com/infinition/Bjorn |
What Bjorn is
A modular Python application leveraging Nmap for vulnerability scanning, supporting multi-service brute-force (SSH, FTP, SMB, RDP, Telnet, SQL), with extensible attack modules, web interface, and real-time e-Paper display integration via GPIO. Status: active development, v1.0.0 released December 2024.
Get the Bjorn source
Clone the repository and explore it locally.
git clone https://github.com/infinition/Bjorn.gitcd Bjorn# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Requires Raspberry Pi OS (32-bit or 64-bit, Debian 12 bookworm) and hardware: Raspberry Pi Zero W or Zero W2 with 2.13-inch e-Paper HAT connected to GPIO pins. Installation via provided shell script automates dependency setup.
- Modular architecture allows custom attack script development; review DEVELOPMENT.md and CONTRIBUTING.md before extending functionality. All discovered data is organized in data/output/ directory accessible via web interface.
- Network scope, target selection, and brute-force credentials must be configured explicitly; tool performs no automatic network discovery without prior configuration to avoid unintended targets.
- Requires stable network access and sufficient Pi storage for vulnerability databases and exfiltrated data. Monitor resource usage; Pi Zero W may experience performance degradation under heavy scanning load.
- Deployment assumes operator responsibility for legal authorization, audit logging, and ethical use. No built-in access controls or kill-switch; manual oversight required before deployment.
When to avoid it — and what to weigh
- Unauthorized or Unethical Use — Bjorn explicitly supports brute-force attacks, file stealing, and host zombification. Deploying it on networks without explicit written authorization is illegal in most jurisdictions and unethical.
- Production Environment Security — This is a penetration testing tool, not a defensive security solution. Do not use for intrusion detection, network hardening, or continuous security monitoring in live production systems.
- Scalability Requirements — Raspberry Pi hardware constraints limit throughput and concurrent operations. Unsuitable for large-scale network scanning, high-volume brute-force campaigns, or enterprise-wide vulnerability management.
- Compliance-Heavy Industries — Use in regulated sectors (finance, healthcare, government) requires careful audit trails, documentation, and legal review. The tool's autonomous behavior and data exfiltration features may conflict with compliance frameworks.
License & commercial use
Distributed under the MIT License, a permissive open-source license permitting use, modification, and redistribution with attribution and liability disclaimer.
MIT License permits commercial use. However, using Bjorn commercially for penetration testing services requires: (1) explicit written authorization from every target organization, (2) documented proof of authorization, (3) understanding that operator bears full legal liability for unauthorized access or data theft. Consult legal counsel before commercial deployment. The tool's offensive nature (brute-force, file theft) makes unauthorized use a serious criminal matter in most jurisdictions.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Adequate |
| License clarity | Clear |
| Deployment complexity | Moderate |
| DEV.co fit | Possible |
| Assessment confidence | High |
Bjorn is an offensive security tool; its security posture is not relevant. Operator considerations: (1) Ensure secure credential storage for brute-force wordlists and target credentials. (2) Restrict physical access to Pi hardware; GPIO access allows direct system compromise. (3) Network segmentation: isolate the Pi from production networks unless explicitly authorized for testing. (4) Data exfiltration feature stores sensitive data locally; ensure encrypted storage and secure deletion post-testing. (5) No built-in audit logging for compliance; implement external logging if required. (6) SSH keys and web interface credentials should follow secure defaults.
Alternatives to consider
Kali Linux on Raspberry Pi
Full penetration testing distribution with Nmap, Metasploit, and community tools; more flexible than Bjorn but lacks autonomous scheduling and e-Paper integration. Better for manual, interactive testing.
Nessus or OpenVAS
Enterprise vulnerability scanners with centralized management, compliance reporting, and remediation workflows. Bjorn is lightweight and autonomous; these are comprehensive but require more infrastructure.
Shodan or Censys
Cloud-based reconnaissance and exposure management platforms. Do not conduct active attacks but provide passive intelligence at scale. Suitable for large organizations; Bjorn is tactical and hardware-bound.
Build on Bjorn with DEV.co software developers
Bjorn is a powerful penetration testing platform for controlled environments. If you require custom security tooling, compliance-aware vulnerability management, or custom development for security operations, Devco can help design, integrate, and deploy solutions tailored to your team.
Talk to DEV.coRelated on DEV.co
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Bjorn FAQ
Can I use Bjorn on networks I don't own or manage?
What Raspberry Pi models are supported?
Can I add my own custom attack modules?
Is there a web interface, and can I monitor Bjorn remotely?
Custom software development services
From first prototype to production, DEV.co delivers software development services around tools like Bjorn. Our software development agency staffs experienced software developers and web developers for custom software development, web development, integrations, and ongoing support across open-source security and beyond.
Need Authorized Security Testing or Custom Offensive Tools?
Bjorn is a powerful penetration testing platform for controlled environments. If you require custom security tooling, compliance-aware vulnerability management, or custom development for security operations, Devco can help design, integrate, and deploy solutions tailored to your team.