The 32K Europe Userpass Base Leak Exposed 26,249 Accounts

In April 2023, HEROIC analysts identified a stealer log advertised as "32k Userpass Europe Base" circulating on a Telegram channel. HEROIC's analysis confirmed 26,249 records in the file, including email addresses, plaintext passwords, and the URLs each login was tied to. As the name indicates, the credentials in this base were specifically curated to focus on European users and services.

Why This Is Dangerous

A regionally targeted base like this one is dangerous because it lets attackers focus their efforts on a specific pool of victims rather than sorting through a mixed, global list. Each of the 26,249 records pairs an email address with its plaintext password and the exact site it belongs to, so an attacker can log in immediately without any additional work. Because the credentials are grouped by region, buyers can more easily match the data to local banking systems, retailers, and services relevant to European accounts.

What Was Exposed

This leak included the following data types:

• Email addresses tied to European users
• Plaintext passwords
• URLs linked to each set of credentials

Why This Matters

With 26,249 records concentrated on European accounts, this base is well suited to credential stuffing campaigns aimed at region-specific banking, email, and retail platforms. Because people frequently reuse passwords across accounts, a single exposed credential from this file could lead to account takeover well beyond whatever service it was originally tied to, and the regional focus makes it easier for attackers to prioritize high-value targets like local financial institutions.

How Stealer Logs Work

A stealer log is created by information-stealing malware, malicious software that infects a device through cracked programs, fake downloads, or phishing attachments, then silently pulls saved browser passwords and active sessions. Sellers often sort large collections of stolen credentials by region, as seen with this Europe-focused base, because buyers frequently want data relevant to a specific country or continent to make their attacks more efficient and harder to detect as unusual activity.

Check If You Are Affected

With 26,249 records concentrated on European users, checking your exposure is especially worthwhile if you are based in Europe. HEROIC's free breach scanner checks your email against a database of more than 400 billion leaked records, including stealer logs like this one, so you can find out quickly and update any reused passwords before someone else logs in first.