ClawHub Skills Safety: How to Vet Before You Install

In March 2026, 1,467 malicious skills flooded ClawHub. An automated audit flagged them for credential stealing, data exfiltration, and file-system attacks. Some deployers didn't catch them in time.

If you're running OpenClaw and considering installing a skill from ClawHub, the question is no longer "is this safe?" It's "how do I verify it's safe before I run it on my infrastructure?"

What Happened: The ClawHavoc Incident

On March 18, ClawHub marketplace experienced a surge of malicious agent skills uploaded under variant accounts. The attack vector: social engineering. Legitimate-sounding usernames ("official_clawhub_devs", "verified_opencloudops", etc.), forked code from real projects, and permission requests that looked normal at first glance.

The damage pattern was consistent:

• Credentials harvesting (API keys, database credentials, OAuth tokens)
• File exfiltration to external servers
• Log tampering to hide execution traces
• Lateral movement attempts to escalate permissions

A non-technical deployer installing one of these skills could expose their entire OpenClaw instance, any connected cloud accounts, and any data the agent had access to.

ClawHub's automated scanning caught the bulk of these within 48 hours, but the manual audit of legitimate edge cases is still ongoing. The good news: there's a concrete vetting process that catches 99% of malicious installs before they run.

The Four-Step Vetting Checklist

Before you click "Install" on any ClawHub skill, you have four tools at your disposal. None require deep technical knowledge, and all together they take about 3 minutes per skill.

Step 1: Check the Author's History

Start here. Open the skill's ClawHub page and look at the author's profile.

What to verify:

• Author verification badge. ClawHub shows a green checkmark for verified authors. This means the author passed identity verification and has a clean history. If the skill is from an unverified account, cross-reference: does this person have a GitHub account? LinkedIn profile? Published work elsewhere? If they're anonymous with zero prior presence, that's a red flag.
• Skills authored count. A single skill from a brand-new account is riskier than skill #47 from someone with years of ClawHub history. Look at their install counts and reviews from other skills.
• Review history. Scroll through the comments. Do other deployers report issues? Are there security concerns flagged in reviews?

If the author fails any of these checks, stop. Don't install it. There are alternatives.

Step 2: Upload to VirusTotal

VirusTotal is a free service that scans code with 70+ antivirus engines. It's not perfect (malware written to evade detection might pass), but it catches the low-hanging fruit — commodity malware signatures, known obfuscation patterns, and obvious credential-stealing code.

How to scan:

1. Download the skill source code from ClawHub (there's a "Download as ZIP" link on every skill page).
2. Go to virustotal.com
3. Drag the ZIP file into the upload area (or paste the file hash if you have it).
4. VirusTotal will scan and report in 30 seconds.

What to look for:

• If any of the 70+ engines flag it as malicious, do not install it. Period.
• If it shows as clean, move to step 3.
• If the file is "not yet analyzed," click "Reanalyze" and wait a minute for fresh results.

VirusTotal won't catch sophisticated attacks, but it's free and it stops the obvious ones.

Step 3: Review Permissions and Tool Access

This is where most non-technical deployers can catch real problems. Even if the code is clean, the permissions the skill requests tell you whether it needs access to sensitive systems.

Every skill declares what it wants to do. ClawHub shows this in a section called "Requested Permissions."

Red flags:

• exec without clear justification. If the skill requests the ability to run arbitrary shell commands and its purpose is "integrate with Slack," that's backwards. It should use the Slack CLI or API, not exec.
• write-files on sensitive paths. Skills should generally write to a temporary directory or a scoped folder. If it requests write access to /home, /root, or your workspace root, question why.
• read-secrets or access to AWS/GCP credentials. Unless the skill is explicitly for credential rotation or secrets management, it shouldn't need this.
• Network access to unusual domains. Some skills legitimately need to call external APIs. But if you see requests to crypto-mining pools, ad networks, or unknown IP ranges, that's suspicious.

Compare the requested permissions against the skill's stated purpose. Does a "Slack notification" skill really need filesystem access? No. Does a "database backup tool" need it? Yes. If there's a mismatch, the skill is either poorly designed or malicious.

Step 4: Test in Isolation

After steps 1-3, you've filtered out 99% of the obvious threats. The last step is a controlled installation.

Before installing:

1. Create a test OpenClaw instance (or a test workspace on your existing instance) with zero access to production data, credentials, or external systems. You can spin up a second OpenClaw on a second machine or a sandbox VPS for $5.
2. Install the skill in the sandbox.
3. Run its basic functionality — does it work as advertised? Does it behave normally, or are there unexpected operations (network calls, file writes, permission escalations)?
4. Check the logs. OpenClaw logs every exec call, file access, and network request. Look for hidden activity.

If the skill passes all this, it's safe to install on production.

What Our Bundles Do by Default

The reason we recommend this process is because the default is risky. But here's what you should know: OpenAgents.mom bundles come pre-configured to minimize exposure even if you do install a malicious skill.

Sandboxed execution — By default, our generated agent workspace includes filesystem restrictions. The agent can't write to your home directory or system paths. Skills run in a scoped sandbox.

Tool allowlisting — Your AGENTS.md file includes an explicit list of which tools the agent can access. Even if a skill attempts to use exec or write-files without permission, OpenClaw denies it. The agent can't execute a tool outside its allowlist.

Permission gating — Certain high-risk operations (credential access, external network calls, destructive commands) go through a human-approval gate by default. If a malicious skill tries to use them, you get an approval prompt. You're not automated away from decisions.

This doesn't eliminate vetting. It's a safety net. The four-step process is still your first line of defense.

Why This Matters Beyond Security

The ClawHavoc incident is a wake-up call, but the bigger point is this: skills are code you're running in your infrastructure. You wouldn't run npm install on a random package with 10,000 downloads without checking its source. You shouldn't install an OpenClaw skill without checking its source either.

The vetting process takes 3 minutes. The cost of a compromised agent could be weeks of forensics and credential rotation.

Deploy agents confidently by vetting them beforehand. Use our bundles' built-in sandbox and allowlist features to defend in depth. You're not paranoid — you're professional.