How Often Should You Scan Your Website for Malware?
"How often should I scan my website for malware?" has a simple answer and a better one. The simple answer: more often than you think. The better answer: it depends on what your site does — a store taking payments needs more frequent checks than a brochure site. Here's a practical cadence, plus why continuous monitoring beats any fixed schedule.
Start now, then set a rhythm: run a free MageArgus scan to establish your baseline.
- Skimmers can operate for weeks before discovery without monitoring — Sansec / MageArgus incident data
- Most infections follow a newly-disclosed vulnerability by days — Patchstack / Sansec
A practical cadence
- Ecommerce (Magento, WooCommerce): at least daily automated scanning, plus a scan after every deploy or extension change. Checkout is money — watch it closely.
- Business / CMS sites: weekly is a reasonable minimum.
- After any change: scan following updates, new plugins/extensions, or staff/agency access changes.
- Immediately: any time you see a warning sign — a blocklist notice, odd redirect, or unexpected admin user.
Why 'scanning' should really be 'monitoring'
A scheduled scan is a snapshot; an attacker can inject and profit between snapshots. The stronger model is continuous monitoring: file-integrity checks that alert on change, plus watching the checkout and key pages. Scanning tells you the state now; monitoring tells you the moment it changes.
Tie scan frequency to your risk
Turn the dials up if you: take card payments, run many third-party extensions, have multiple people with admin access, or run an older platform. Each of those raises both the odds and the cost of a compromise, so it justifies more frequent checks.
Make it automatic
A scan you have to remember is a scan you'll skip. Schedule it, route alerts to somewhere you'll see them, and pair remote scanning with an on-disk check for depth. See how website malware scanners work and the Magento scanner tools.
Frequently asked questions
Is a monthly scan enough?
For a low-risk brochure site, maybe. For anything taking payments, no — a skimmer planted the day after a monthly scan could run for four weeks. Ecommerce sites should scan daily and monitor checkout continuously.
Does frequent scanning hurt performance?
Remote scans just fetch public pages and add negligible load. On-disk scans are heavier but can be scheduled for off-peak hours and rate-limited, so they don't affect shoppers.