Onliner Spambot

High

Data breach — August 2017

In August 2017, a spambot by the name of Onliner Spambot was identified by security researcher Benkow moʞuƎq. The malicious software contained a server-based component located on an IP address in the Netherlands which exposed a large number of files containing personal information. In total, there were 711 million unique email addresses, many of which were also accompanied by corresponding passwords. A full write-up on what data was found is in the blog post titled Inside the Massive 711 Million Record Onliner Spambot Dump.

711.5M

Records exposed

2017

Year

Data types

Free

To check

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Quick answer — was Onliner Spambot breached?

Yes. Onliner Spambot was breached in August 2017, exposing 711,477,622 records including email addresses, passwords. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.

What happened in the Onliner Spambot data breach?

The exposed data included 2 types of personal information. Because passwords were exposed, users who reused their password on other sites are at particular risk. Learn more about what a data breach means for you.

Why was the Onliner Spambot breach so dangerous?

The Onliner Spambot breach exposed 711,477,622 records — 711.5M people whose personal data is now circulating in criminal markets.

Because passwords were exposed, attackers can use credential stuffing to automatically test your Onliner Spambot credentials against hundreds of other websites. Read more about what happens to your data after a breach.

Don't wait to find out — check if your email was exposed in this breach.

What data was stolen in the Onliner Spambot breach?

Email addresses Passwords

Email addresses — used for phishing attacks and credential stuffing against your other accounts

Passwords — can be used to access your accounts directly or cracked to reveal your actual password

Is the Onliner Spambot breach still dangerous in 2026?

Yes. Stolen data from the Onliner Spambot breach remains dangerous years after the incident. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2017 are still actively used in automated attacks today.

Personal information like email addresses, phone numbers, and dates of birth does not expire. Even if you changed your Onliner Spambot password, the other exposed data can be combined with information from other breaches to target you. Learn how long stolen data stays dangerous.

What to do if your email was in the Onliner Spambot breach

Change your Onliner Spambot password immediately

Log into Onliner Spambot and change your password to something strong and unique — one you have never used anywhere else.

Change any account sharing that password

If you reused this password elsewhere, change it on every affected account. Attackers test stolen credentials against hundreds of popular sites within hours.

Enable two-factor authentication

Turn on 2FA on Onliner Spambot and every important account. Even if your password is known, attackers cannot access the account without the second factor.

Check your other accounts for this breach

Run a full email scan to see every breach your address appears in — not just this one.

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Frequently asked about the Onliner Spambot breach

How many people were affected by the Onliner Spambot data breach?

Approximately 711,477,622 user records were exposed in the Onliner Spambot breach in August 2017.

Is the Onliner Spambot breach still a risk in 2026?

Yes. Leaked credentials are actively used in credential-stuffing attacks years after a breach. If you reused your Onliner Spambot password elsewhere and have not changed it, those accounts remain at risk today.

How do I check if my email was in the Onliner Spambot breach?

Enter your email in the free checker on EmailLeaked. We scan millions of breach records including the Onliner Spambot dataset and tell you instantly whether your email was exposed and what data was taken.

What should I do if I was in the Onliner Spambot breach?

Change your Onliner Spambot password immediately, update any account where you used the same password, enable two-factor authentication on all important accounts, and monitor for phishing emails over the next 90 days.

How this breach page is reviewed

Breach pages are built from structured breach records and reviewed for practical risk guidance by EmailLeaked. Risk labels reflect exposed data types and are intended to help readers prioritise action.

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