Malicious Browser Extensions: How Small Businesses Can Stop Crypto Theft

Why hidden browser extensions can cost your business money

A recent security research report uncovered 19 browser extensions for the Chrome and Edge browsers that silently steal cryptocurrency wallet credentials and drain funds. For a small business that relies on online payments, a compromised wallet can mean lost revenue, damaged reputation, and a painful recovery process. The good news? You can spot and stop these threats yourself – and you don’t need to become a tech expert to do it.

How to protect your business from malicious browser extensions

If you’re wondering how to protect my business from hackers, start by checking every browser extension you’ve installed.

How to audit your browser extensions – a simple checklist

You don’t need a security team to perform a quick health check. Follow these steps once a month, or whenever you add a new extension:

1. Open your extension list
   Chrome: Click the three‑dot menu → More tools → Extensions.
   Edge: Click the three‑dot menu → Extensions.

2. Count the extensions – If you have more than you remember installing, investigate the unknown ones.

3. Check the source – Only keep extensions that come from the official Chrome Web Store or Microsoft Edge Add‑ons store. Extensions installed from third‑party sites are far riskier.

4. Read the permissions – Each extension shows a list of permissions (e.g., “Read and change all your data on websites you visit”). Be wary of extensions that request broad access without a clear reason.

5. Look for recent updates – Extensions that have been updated in the last few weeks but you didn’t trigger the update could be a red flag.

6. Search the name online – A quick Google search for the extension name plus “malware” or “security” often reveals if it has been reported as suspicious.

7. Remove anything you don’t use daily – Even a useful tool that you only need once a month is a potential entry point.

8. Enable automatic updates only for trusted extensions – Turn off auto‑update for extensions you’re unsure about, then manually review each new version.

9. Consider a dedicated security tool – Some security suites can monitor browser activity and alert you when an extension tries to contact unknown servers.

Quick audit example

Imagine you run a small bakery with an online ordering system. You’ve installed a “price‑tracker” extension to monitor competitor prices and a “PDF printer” to generate receipts. Using the checklist above, you discover that the price‑tracker requests “Read and change all your data on websites you visit,” which is excessive for a simple price check. A quick search shows that the same extension name appeared in a recent security report. You remove it, keeping only the PDF printer, which only needs permission to read and write PDFs.

Next steps: secure your browsers with IT Move NL

A quick scan can spot risky add‑ons and set up real‑time alerts. Let us help you keep your browsers safe.

Frequently asked questions

Q: How can I tell if a browser extension is a security risk?
A: Look at the permissions it requests, check where it was installed from, and search online for any reports of malicious behavior. Extensions that ask for broad access without a clear purpose are often risky.

Q: I only use extensions from the official Chrome Web Store. Are they safe?
A: The official store reduces the risk, but malicious extensions can still slip through. Regularly reviewing permissions and recent updates adds an extra layer of protection.

Q: Will disabling extensions break my business tools?
A: Most core business tools (e.g., accounting software accessed via a web browser) work without extensions. If an extension is essential, verify its permissions and consider limiting its use to a separate browser profile.

Q: Can an extension steal data from a site that uses two‑factor authentication (an extra security step, like a code sent to your phone)?
A: two‑factor authentication (an extra security step, like a code sent to your phone) can be compromised. If an extension can read the page content, it can capture the one‑time code you receive, just like it can capture a password.

Take the next step – let us secure your browsers

At IT Move NL we understand that technology should work for you, not become a hidden threat. Our Security & Protection service now includes a Browser Extension Security Audit. We’ll:

• Scan every browser used in your business for risky extensions.
• Block known malicious add‑ons and set up real‑time alerts for suspicious activity.
• Provide a short, actionable report so you can keep your team’s browsers clean and safe.

Free assessment: Contact us for a no‑obligation scan of up to five browsers. Let’s make sure your extensions are helping, not harming, your business.

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Sources:

• 19 Chrome and Edge Extensions Found With Wallet-Stealing and Crypto-Draining Code