modbender Skill Flag Skill 🛡️
Scan Clawdbot/OpenClaw skills for malicious patterns, backdoors, and security risks.
Created by: DarkM00n (Bug Bounty Hunter & Security Researcher)
Commands
Scan All Installed Skills
scan skills
scan all skills
security scan
Scan Specific Skill
scan skill <skill-name>
check skill <skill-name>
Scan Before Installing (URL/Path)
scan skill url <clawdhub-url>
pre-scan <skill-name>
Quick Risk Report
skill risk report
security report
How To Use
Run the scanner:
python3 skills/skill-flag/scanner.py [--skill NAME] [--all] [--verbose]
Or ask the agent:
- "Scan all my installed skills for security issues"
- "Check if the crypto-tracker skill is safe"
- "Give me a security report"
What It Detects
| Category | Risk Level | Examples |
|---|---|---|
| 🔴 Data Exfiltration | CRITICAL | curl/wget to external domains, fetch(), requests.post() |
| 🔴 Backdoors | CRITICAL | Reverse shells, nc -e, bash -i, encoded payloads |
| 🔴 Credential Theft | CRITICAL | Access to ~/.ssh, ~/.aws, API keys, .env files |
| 🟠 Prompt Injection | HIGH | "ignore previous", "system override", "new instructions" |
| 🟠 Code Execution | HIGH | eval(), exec(), subprocess with shell=True |
| 🟡 Persistence | MEDIUM | Cron jobs, systemd units, startup scripts |
| 🟡 Obfuscation | MEDIUM | Base64 encoded commands, hex strings, rot13 |
| 🟢 Suspicious | LOW | Uncommon imports, network activity |
Risk Score
Each skill gets a score from 0-100:
- 0-20: ✅ Clean - No issues found
- 21-40: 🟢 Low Risk - Minor concerns
- 41-60: 🟡 Medium Risk - Review recommended
- 61-80: 🟠 High Risk - Careful inspection needed
- 81-100: 🔴 Critical - Do not use without audit
Output
Reports saved to: skills/skill-flag/reports/
Example output:
🛡️ SECURITY SCAN REPORT
━━━━━━━━━━━━━━━━━━━━━━━
Scanned: 12 skills
Clean: 9
Warnings: 2
Critical: 1
⚠️ WARNINGS:
- crypto-tracker: External API calls (expected for price data)
- web-scraper: Uses requests library
🔴 CRITICAL:
- shady-skill:
- Line 45: curl to unknown domain
- Line 67: Base64 encoded payload
- Line 89: Reads ~/.ssh/id_rsa
RECOMMENDATION: Remove immediately
Directories Scanned
~/.clawdbot/skills/- Global installed skills./skills/- Workspace skills~/.npm-global/lib/node_modules/clawdbot/skills/- Built-in skills
False Positives
Some legitimate skills need network access or file operations. The scanner flags them for review but doesn't auto-block. Use judgment:
- Price trackers → API calls expected ✓
- Email skills → Network access expected ✓
- File managers → File operations expected ✓
Pro Version (Coming Soon)
- Continuous monitoring
- ClawdHub pre-install scanning
- Custom whitelist/blacklist
- Scheduled reports
- Webhook alerts