by FunnyWolf
Adversary simulation and Red teaming platform with AI
# Add to your Claude Code skills
git clone https://github.com/FunnyWolf/ViperLast scanned: 4/19/2026
{
"issues": [
{
"type": "npm-audit",
"message": "esbuild: esbuild enables any website to send any requests to the development server and read the response",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "file-type: file-type affected by infinite loop in ASF parser on malformed input with zero-size sub-header",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "open-cli: Vulnerability found",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "vite: Vite Vulnerable to Path Traversal in Optimized Deps `.map` Handling",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "vitepress: Vulnerability found",
"severity": "medium"
}
],
"status": "PASSED",
"scannedAt": "2026-04-19T06:01:44.323Z",
"semgrepRan": false,
"npmAuditRan": true,
"pipAuditRan": true
}Viper is an open-source ai agents skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by FunnyWolf. Adversary simulation and Red teaming platform with AI. It has 5,131 GitHub stars.
Yes. Viper passed SkillsLLM's automated security scan — a dependency vulnerability audit plus prompt-injection heuristics — with no high-severity issues. You can read the full report in the Security Report section on this page.
Clone the repository with "git clone https://github.com/FunnyWolf/Viper" and add it to your Claude Code skills directory (see the Installation section above).
Yes. SkillsLLM lists many other AI Agents skills you can browse and compare side by side. Open the AI Agents category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh Viper against similar tools.
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VIPER is a powerful and flexible red team platform. It integrates the core tools and functionalities required for adversary simulation and red team operations, assisting you in efficiently completing cybersecurity assessment tasks.
User-Friendly Interface
Provides an intuitive interface that enables red team members to rapidly initiate security assessment tasks.
Multi-Platform Support
Supports red team assessments across multiple operating systems, including Windows, Linux, and macOS, ensuring broad compatibility.
Out-of-the-Box Red Teaming Tools
Designed to cover all phases of the MITRE ATT&CK framework, offering a comprehensive attack simulation solution.
Integrated LLM Agent
Built-in Large Language Model (LLM) agent enhances automated processing capabilities and intelligent decision-making support.
Automated Workflows
Supports orchestration and notification mechanisms for 24/7 monitoring of target environments.
Rich Built-in Modules Integrates over 100 post-exploitation modules covering all stages of the MITRE ATT&CK framework, meeting the needs of different scenarios.
Custom Extensibility
Supports Python-based custom module development to meet specialized requirements or add extended functionalities.
More Advanced Features Includes built-in anti-tracing/handler firewall/defense evasion/pivot graph/automated notification functions.

| VIPER | Cobalt Strike | NightHawk | BruteRatel | |
|---|---|---|---|---|
| Implants | WindowsLinuxMacOS | Windows | Windows | Windows |
| Visual UI | ✅ | ✅ | ✅ | ✅ |
| Pivot Graph | ✅ | ✅ | ✅ | ✅ |
| Custom Plugin | Python | CNA | ❌ | ❌ |
| Built-in Evasion | ✅ | ❌ | ✅ | ✅ |
| Automation | ✅ | ❌ | ✅ | ❌ |
| Team Collaboration | ✅ | ✅ | ❌ | ❌ |
| LLM Agent | ✅ | ❌ | ❌ | ❌ |
| Price | Free | $12,600 user/year | $10,000 user/year | $3,000 user/year |