VirusTotal Domain Reputation Check: What Attackers Know About Your Domain

Your domain's reputation directly impacts email deliverability, customer trust, and security posture. But you might not know it's been blacklisted.

VirusTotal is a free tool that aggregates threat intelligence from 70+ security vendors. When your domain appears in VirusTotal's database with a low reputation score, it signals to email filters, browsers, and security tools that your domain is suspicious—or outright dangerous.

This guide shows you how to check your domain's reputation and fix damage from past compromises.

What VirusTotal Actually Shows About Your Domain

VirusTotal analyzes domains across multiple threat categories:

• Malware/phishing: Is your domain known for distributing malware or phishing content?
• C2 (Command & Control) infrastructure: Is your domain linked to botnet activity?
• Spam/reputation: Do major email filters flag mail from your domain?
• Blacklist status: Are you listed on DNS blocklists (RBLs), SURBL, or other public lists?
• Certificate data: SSL certificate history, chain of trust, revocation status
• DNS records: MX, SPF, DMARC, DKIM configuration (shows email security posture)
• Passive DNS data: Historical IP ownership, subdomain enumeration, past resolutions

Critical insight: Even if your domain is currently clean, VirusTotal's historical data shows all past IP addresses, registrars, and ownership changes. Attackers use this to find evidence of compromise.

How Your Domain Gets a Bad Reputation

Scenario 1: Your Startup's Email Infrastructure Was Compromised

Someone gained access to your email server or sent spam from your domain. Email providers flagged your domain as a spam source. Months later, even after you patched the vulnerability, email filters still see you as a sender of spam.

Impact: Legitimate emails land in spam. Enterprise prospects never see your sales outreach. Revenue loss.

Scenario 2: Your Domain Was Used for Phishing Before You Owned It

You registered a domain that was previously used for phishing attacks. The domain is still blacklisted under the old owner's activity, but the blacklist doesn't distinguish between past and current owners.

Impact: Your domain is flagged as malicious before you even launch.

Scenario 3: A Subdomain Was Compromised (And You Didn't Notice)

An attacker compromised staging.yourcompany.com and hosted malware there. The malware was reported to VirusTotal, AbuseIPDB, and Google Safe Browsing. You cleaned up staging, but the reputation damage persists.

Impact: Your main domain's reputation suffers. Email filters get stricter with all your subdomains.

Checking Your Domain Reputation: The Step-by-Step Process

Step 1: Run the VirusTotal Check

1. Go to virustotal.com
2. Paste your domain in the search box (e.g., yourcompany.com)
3. Click "Search"
4. Review the results

Step 2: Interpret the Results

Green checkmark = Clean. No major security vendors flagged your domain.

Yellow warning = Caution. Some vendors flagged it. Could be false positive or legitimate issue.

Red/Orange = Bad reputation. Multiple vendors consider your domain malicious.

Key metrics to check:

• Vendors flagging as malicious: How many? If 5+ vendors flag it, reputation is severely damaged.
• Blacklist status: Are you on Spamhaus, SURBL, or other RBLs? These directly impact email deliverability.
• Last analysis date: Was it flagged months ago? Reputation decay is slow but possible.
• URL submissions: Are there URLs under your domain flagged as malware/phishing? (e.g., yourcompany.com/malware.exe)

Step 3: Check Related Infrastructure

From the VirusTotal page, check:

• Subdomains: Look for suspicious subdomains you don't own
• DNS records: Verify your SPF, DMARC, DKIM setup
• WHOIS data: Confirm domain registrar and registration date
• SSL certificate chain: Any suspicious certificates?

Step 4: Deep Dive - URL Reputation

If individual URLs under your domain are flagged:

1. Check virustotal.com/search → "URL" tab
2. Search for yourcompany.com/* to see flagged URLs
3. Note which URLs are flagged and why
4. Verify the files/pages no longer exist (scan with wget to confirm)

Repairing Domain Reputation: The Action Plan

Priority 1: Identify & Remove Compromised Content (Do today)

If VirusTotal shows flagged URLs:

1. Verify they're actually gone: Try accessing the URL. If you get a 404, it's deleted.
2. Check your logs: Did the attack happen? Search your access logs for the flagged URL date.
3. If the file exists: It's still compromised. Remove it immediately.
4. Scan your system: Use grep, filesystem search, and web scanner to find similar malware.

Priority 2: Submit for Delisting (This week)

Once you've confirmed malicious content is removed:

1. VirusTotal: No direct delisting. VirusTotal auto-updates when vendors update their databases.
2. Google Safe Browsing: If flagged, submit delisting request at google.com/safebrowsing
3. Individual vendors: If specific vendors flagged you (Malwarebytes, Norton, etc.), some offer delisting requests through their websites.
4. Email blacklists: For Spamhaus, SURBL, etc., visit their website and submit a removal request. Include proof that the spam/malware issue is resolved.

Priority 3: Fortify Email Infrastructure (This month)

Domain reputation damage usually comes from email compromise. Prevent future damage:

• Implement SPF: Restrict who can send email from your domain
• Implement DMARC: Authenticate email and prevent spoofing
• Implement DKIM: Sign emails cryptographically
• Monitor DNS: Use alerting to catch unauthorized DNS changes
• Secure email accounts: Enforce MFA on all email admin accounts
• Monitor VirusTotal: Check your domain reputation monthly

Priority 4: Monitor for Future Issues (Ongoing)

Set up automated monitoring:

# Weekly cron job to check domain reputation
0 9 * * 1 curl -s "https://www.virustotal.com/api/v3/domains/yourcompany.com" \
  -H "x-apikey: $VIRUSTOTAL_API_KEY" | jq '.data.attributes.last_analysis_stats'

What If You're Still Blacklisted After Cleanup?

Timeline: Blacklist removal typically takes 1-7 days, but can take weeks.

Why the delay: Email vendors don't auto-remove listings. They wait for evidence that you've:

• Fixed the vulnerability
• Not re-infected
• Implemented long-term controls

Proof of fix:

• Monthly VirusTotal checks showing clean status
• SPF/DMARC/DKIM implementation
• Log evidence that suspicious activity has stopped
• Third-party security audit (shows you're serious)

Enterprise impact: If blacklisted, enterprise customers may refuse to do business with you regardless of the reason. Factor this into sales discussions: "We had a security incident. Here's how we fixed it and how we're preventing recurrence."

The Real Cost of Domain Reputation

• Email deliverability: 20-40% of legitimate emails fail to reach inboxes
• Sales impact: Prospects never see outreach emails
• Customer trust: Browsers warn visitors; customers assume breach
• Time to recovery: 4-12 weeks after comprehensive cleanup

The bottom line: Domain reputation damage is slow to fix but fast to prevent. Monthly VirusTotal checks cost 5 minutes. Ignoring them costs weeks of lost revenue.

Check your domain on VirusTotal today. If you're clean, great. If not, start the remediation clock now.

Need a comprehensive security assessment that checks domain reputation, email infrastructure, and external attack surface? RedRadar's automated security reports identify exactly what attackers see about your company. Get your free assessment: redradar.aisolutionsdev.com

Published: 2026-04-21 | Topics: Domain Reputation, Email Security, Threat Intelligence