moltcops

MoltCops — Skill Security Scanner

Scan any skill for security threats before you install it. Detects prompt injection, data exfiltration, sleeper triggers, drain patterns, and 16 more threat categories.

Local-first. Your code never leaves your machine. No API calls. No uploads. No accounts.

When to Use

• Before installing any skill from ClawHub, GitHub, or other sources
• Before running skills shared by other agents
• When evaluating unknown code from any source
• After ClawHavoc: 341 malicious skills were found on ClawHub this week. Scan first.

How to Run

python3 scripts/scan.py <path-to-skill-folder>

Example:

# Scan a skill before installing
python3 scripts/scan.py ~/.openclaw/skills/suspicious-skill

# Scan a freshly downloaded skill
python3 scripts/scan.py ./my-new-skill

No dependencies required — uses only Python 3 standard library.

Reading Results

The scanner returns three verdicts:

Verdict	Exit Code	Meaning
PASS	0	No critical or high-risk threats detected. Safe to install.
WARN	1	High-risk patterns found. Review findings before installing.
BLOCK	2	Critical threats detected. Do NOT install this skill.

What It Detects

20 detection rules across these threat categories:

Category	Rules	Examples
Prompt Injection	MC-001, MC-002, MC-003	System prompt override, jailbreak payloads, tool-use steering
Code Injection	MC-004, MC-005, MC-006, MC-019	Shell injection, eval/exec, base64-to-exec, child_process
Data Exfiltration	MC-007, MC-008, MC-009, MC-010, MC-020	Webhook URLs, env var harvesting, SSH key access, credential files
Hardcoded Secrets	MC-011, MC-012	API keys in source, private key material
Financial	MC-013	Drain patterns, unlimited withdrawals
Lateral Movement	MC-014	Git credential access, repo manipulation
Persistence	MC-015, MC-016	SOUL.md writes, cron job creation
Autonomy Abuse	MC-017	Destructive force flags (rm -rf, git push --force)
Infrastructure	MC-018	Permission escalation (sudo, chmod 777)

False Positive Handling

The scanner includes context-aware filtering to reduce false positives:

• Env var access (MC-008): Only flags when variable names contain KEY, SECRET, PASSWORD, TOKEN, or CREDENTIAL
• Git operations (MC-014): Skips standard remotes (github.com, gitlab.com, bitbucket.org)
• Force flags (MC-017): Only flags on destructive operations, not install scripts

Example Output

MoltCops Security Scanner
========================================
Scanning: ./suspicious-skill
Files: 5
Rules: 20

FINDINGS
----------------------------------------
[CRITICAL] MC-007: Exfiltration URL (main.py:14)
[CRITICAL] MC-004: Shell Injection (helper.sh:8)
[HIGH] MC-005: Dynamic Code Execution (main.py:22)

SUMMARY
========================================
Files scanned: 5
Total findings: 3
  Critical: 2
  High:     1
  Medium:   0

VERDICT: BLOCK
Critical threats detected. Do NOT install this skill.

Web Scanner

For a browser-based version with the same engine, visit: https://scan.moltcops.com

About MoltCops

MoltCops protects the AI agent ecosystem from malicious skills. While VirusTotal catches known malware signatures, MoltCops catches behavioral patterns — drain logic, sleeper triggers, prompt injection, and data exfiltration that signature-based scanning misses.

• Web: https://moltcops.com
• Moltbook: https://moltbook.com/u/MoltCops