Researchers Link 493k UHQ Europe Base to 445,218 Stolen Credentials

HEROIC analysts identified this stealer log on 29-Jan-2023. The breach exposed 445,218 records, with stolen data including email addresses, plaintext passwords, and URLs. The source is identified as 493k UHQ Europe Base uploaded by a Telegram User.

Why This Is Dangerous

With 445,218 stolen email and password pairs targeting European accounts, this breach gives attackers a large pool of credentials to use in automated attacks. The included URLs reveal exactly which services victims were accessing, letting attackers prioritize high-value targets like banking portals, email providers, and e-commerce platforms. The plaintext nature of the passwords means there is no decryption required before they can be used.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs

Why This Matters

A dataset of this scale is particularly dangerous because it can be used immediately in large credential stuffing campaigns. Attackers try the stolen username and password combinations on dozens of popular platforms at once, looking for matches. Anyone who reuses passwords across services is at high risk of account takeover. This breach is linked to identity theft, financial fraud, and unauthorized access to personal and work accounts.

How Stealer Logs Work

Stealer logs are produced by malware that infects computers without the user's knowledge. The malware runs in the background, capturing login credentials as they are typed and harvesting passwords saved in the browser. The resulting files are collected and distributed through private Telegram groups and dark web marketplaces, often sold in bulk to other criminal actors.

Check If You Are Affected

HEROIC offers a free breach scanner that searches 400 billion records from known breaches. Search your email address now to find out if your credentials appear in this breach or others. The scan is free and takes seconds.