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在 OpenClaw 中安装
/install crabukit
功能描述
Security scanner for OpenClaw skills with Clawdex integration. Analyzes SKILL.md and scripts for dangerous permissions, hardcoded secrets, shell injection vu...
使用说明 (SKILL.md)
🔒 Crabukit
Security scanner for OpenClaw skills. Prevents installation of malicious or vulnerable skills by static analysis. Integrates with Clawdex for comprehensive protection.
Quick Start
# Safely install a skill (scans before installing)
crabukit install youtube-summarize
# Scan a local skill before installing
crabukit scan ./suspicious-skill/
# Scan an installed skill
crabukit scan /opt/homebrew/lib/node_modules/clawdbot/skills/unknown-skill
# CI mode - fail on high severity or above
crabukit scan ./my-skill --fail-on=high
# List all detection rules
crabukit list-rules
🔌 Clawdex Integration
Crabukit automatically integrates with Clawdex if installed:
# Install Clawdex for database-based protection
clawdhub install clawdex
# Now crabukit will:
# 1. Check Clawdex database (known 824+ malicious skills)
# 2. Run behavior analysis (zero-day detection)
# → Defense in depth!
Layered Protection:
- Clawdex: Database of known-bad skills (fast lookup)
- Crabukit: Behavior analysis for zero-days (static analysis)
What It Detects
| Category | Issues |
|---|---|
| External DB | Known malicious skills (via Clawdex) |
| Secrets | Hardcoded API keys, private keys, passwords |
| Code Injection | eval(), exec(), subprocess(shell=True) |
| Shell Risks | curl | bash, rm -rf, unquoted variables |
| Permissions | Dangerous tool requests without safety guidance |
| Metadata | Suspicious patterns in SKILL.md descriptions |
Risk Scoring
Crabukit assigns a score (0-100) based on findings:
| Score | Level | Action |
|---|---|---|
| 0 | Clean | Safe to install |
| 1-9 | Low | Minor issues |
| 10-24 | Medium | Review findings |
| 25-49 | High | Careful review required |
| 50+ | Critical | Do not install |
Exit Codes
0- Scan completed, no findings at or above--fail-onthreshold1- Findings at or above threshold detected
CI/CD Integration
# .github/workflows/security.yml
- name: Scan skill
run: |
pip install crabukit
crabukit scan ./my-skill --fail-on=medium
Installation
# Via ClawdHub (when published)
clawdhub install crabukit
# Or via pip
pip install crabukit
# Or from source
git clone https://github.com/tnbradley/crabukit.git
cd crabukit
pip install -e .
安全使用建议
Crabukit appears to be what it claims: a static security scanner with rule sets and tests. Before installing or running it with elevated privileges: 1) Inspect scripts/claw-safe-install.sh and do not blindly copy/source it into your shell — run it in a sandbox first or read it line-by-line. 2) Review external_scanners.py (Clawdex integration) to confirm which remote endpoints are contacted and whether any credentials are needed. 3) Prefer installing from the published package index (or a verified GitHub release) rather than unverified sources; verify the project URL and maintainer. 4) Run the package in an isolated environment (virtualenv/container) and run the test-suite included to verify behavior. 5) Because this is a security tool that looks for dangerous patterns, antivirus false positives are possible — treat those explanations cautiously and audit the code yourself if you rely on it for security-critical workflows.
功能分析
Type: OpenClaw Skill
Name: crabukit
Version: 0.1.3
The OpenClaw skill 'crabukit' is a security scanner designed to detect malicious patterns, vulnerabilities, and prompt injection attempts in *other* OpenClaw skills. While its codebase contains numerous patterns for highly malicious activities (e.g., RCE, data exfiltration, backdoors, `curl|bash`, `eval`/`exec`, prompt injection phrases), these are consistently implemented as *detection rules* within its analyzers and pattern definitions (`crabukit/rules/patterns.py`, `crabukit/analyzers/*.py`), or as *test fixtures* (`tests/fixtures/malicious-skill/`) to validate its detection capabilities. The `SECURITY.md` explicitly addresses potential false positives from antivirus software due to its defensive nature. The only external network call identified (`crabukit/external_scanners.py`) is a legitimate query to the Clawdex threat intelligence API (`https://clawdex.koi.security`) to check the reputation of the *skill being scanned*, not to exfiltrate user data. The `scripts/claw-safe-install.sh` wrapper also implements a defensive 'scan-before-install' mechanism. There is no evidence of intentional harmful behavior by the 'crabukit' skill itself; its purpose is to enhance security.
能力评估
Purpose & Capability
The skill's name/description (security scanner) matches the code and tests: analyzers for bash/python, permission checks, rules/patterns, CLI, and CI integration. It does not request unrelated credentials or system-wide binaries. One minor mismatch: registry metadata said 'no install spec / instruction-only' while SKILL.md includes package install metadata (pip). This likely reflects packaging metadata being present in SKILL.md but is not a functional risk.
Instruction Scope
SKILL.md contains clear runtime instructions for scanning, installing via pip, and optional integration with Clawdex. It also suggests copying a 'claw-safe-install.sh' wrapper into the user's home and adding it to shell config — that is a persistent change the user must opt into. The SKILL.md also lists prompt-injection trigger phrases (e.g., 'ignore-previous-instructions') as detection targets; the presence of those strings is expected for a scanner but was flagged by the pre-scan detector.
Install Mechanism
Installation is via pip / standard Python packaging and links to a GitHub repo in docs/examples. There is no binary download from an untrusted host or extract-from-arbitrary-URL behavior. CI uses pip install -e . which is standard for Python projects.
Credentials
The package declares no required environment variables, no primary credential, and no config paths. Optional integration with Clawdex is documented; that integration appears to be optional and should be explained to users before providing any Clawdex credentials. No broad unrelated credentials are requested.
Persistence & Privilege
The skill does not request permanent agent inclusion (always:false) and does not modify other skills. However, documentation recommends copying a shell wrapper into the user's home and sourcing it in shell config, which is a user-driven persistent change. Users should inspect that script before adding it to their shell startup.
如何使用
- 确保已安装 OpenClaw（本地或 Docker 部署）
- 在对话框中输入安装命令：
/install crabukit - 安装完成后，直接呼叫该 Skill 的名称或使用
/crabukit触发 - 根据 Skill 的参数说明提供必要输入，即可获得结构化输出
版本历史
v0.1.3
- Internal maintenance updates for broader standards compliance.
- Added SECURITY.md with security policy disclosure.
- Updated package metadata in pyproject.toml.
- No changes to functionality or user-facing features.
v0.1.2
- Updated SKILL.md metadata for improved compatibility with Clawdbot, including expanded file listing and revised metadata key from "openclaw" to "clawdbot".
- No functional changes to the scanning engine or CLI behavior.
- Documentation updates only; package functionality remains unchanged.
v0.1.1
crabukit v0.1.1 changelog
- Added initial test suite (`tests/` directory) to support test-driven development.
- Updated installation metadata: pip install now references source (`package: .`) instead of PyPI, improving support for local installs.
- Updated documentation files for clarity and current usage (README.md, CONTRIBUTING.md, SECURITY.md).
- Improved shell installation script (`scripts/claw-safe-install.sh`).
- Various bugfixes and internal improvements in source files.
v0.1.0
- Initial release of crabukit: a security scanner for OpenClaw skills.
- Analyzes SKILL.md and scripts for secrets, dangerous permissions, shell injection, and malicious code.
- Integrates automatically with Clawdex to detect known-malicious skills.
- Assigns a risk score and supports CI/CD workflows.
- Supports scanning skills during install, development, or auditing installed skills.
元数据
常见问题
Crabukit 是什么？
Security scanner for OpenClaw skills with Clawdex integration. Analyzes SKILL.md and scripts for dangerous permissions, hardcoded secrets, shell injection vu... 它是一个面向 Claude Code / OpenClaw 的 AI Agent Skill 插件，目前累计下载 620 次。
如何安装 Crabukit？
在 OpenClaw 或 Claude Code 对话框中运行命令「/install crabukit」即可一键安装，无需额外配置。
Crabukit 是免费的吗？
是的，Crabukit 完全免费（开源免费），可自由下载、安装和使用。
Crabukit 支持哪些平台？
Crabukit 跨平台运行，可在任意部署了 OpenClaw / Claude Code 的环境中使用（cross-platform）。
谁开发了 Crabukit？
由 tnbradley（@tnbradley）开发并维护，当前版本 v0.1.3。
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