356k Germany Netherlands Combo: 332,763 Logins Quietly Exposed

A Quiet Leak Involving German and Dutch Domains

HEROIC analysts came across a stealer log dataset called "356k Germany Netherlands Domain Combo" shared in a Telegram channel on January 8, 2023. There was no announcement, no press release, just a file quietly posted for anyone to download. It contains 332,763 records, each pairing an email address with a plaintext password and the URL of the German or Dutch site the login belongs to.

Why This Is Dangerous

The quiet nature of these leaks is part of what makes them dangerous: there is no public disclosure telling affected users to change their passwords, so credentials can sit exposed and usable for a long time before anyone notices. Because the passwords in this file are stored in plaintext, an attacker does not need to do any extra work to use them, they can be tried directly against the associated German or Dutch websites.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of German and Dutch domains tied to each login

Why This Matters

With 332,763 records in play, this is large enough to fuel widespread credential stuffing attacks against German and Dutch websites and any other service where the same email and password might have been reused. Because the leak never made headlines, many affected users may have no idea their information is circulating, which is exactly the kind of silence attackers rely on.

How Stealer Logs Work

Stealer logs like this one come from malware that infects a device and quietly copies saved browser logins in the background, often without the victim ever noticing anything happened. Whoever operates the malware can filter the stolen data by domain or region, in this case pulling out German and Dutch site logins, and package it as a combo list for quiet distribution on Telegram, far from public attention.

Check If You Are Affected

Because leaks like this rarely make the news, checking your own exposure is the only reliable way to know where you stand. HEROIC's free breach scanner searches more than 400 billion breached records, including quiet stealer log dumps like this one, so you can find out privately whether your email address is affected.