The EU Combo Mix Leak Gives Attackers What They Need for Takeover

A combolist named "EU combo mix" was uploaded to Telegram in September 2024, containing 7,784 records of email addresses, plaintext passwords, and the URLs each login was tied to. The name suggests the uploader grouped these credentials as coming from European accounts, though the file offers no further breakdown by country.

Why This Is Dangerous

Because the passwords are stored in plaintext, an attacker can start testing every one of the 7,784 logins immediately, with no need to crack or decrypt anything first. That gives attackers everything they need to attempt account takeover across the accounts in this file right away.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs linked to each login

Why This Matters

Anyone whose credentials appear in this file is at risk of account takeover, and if the password was reused on other services, attackers can use it to attempt credential stuffing against email, banking, or shopping accounts well beyond the site it was originally tied to.

How a Regional Combo Mix Gets Built

Lists labeled by region, like this "EU combo mix," are typically assembled by filtering a larger pool of stolen credentials, pulled from phishing pages, stealer malware, and older breaches, down to accounts believed to originate from a particular area, then packaging the result for distribution on Telegram.

Check If You Are Affected

Search HEROIC's free breach scanner, which checks your email against more than 400 billion leaked records, to see if you are among the 7,784 accounts in this file, and change your password anywhere you have reused it.